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PMC-T402 Temperature & Iresidual Monitor
User Manual
Version: V1.0
November 09, 2017
CET Inc.
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This manual may not be reproduced in whole or in part by any means without the express
written permission from CET Electric Technology (CET).
The information contained in this manual is believed to be accurate at the time of publication;
however, CET assumes no responsibility for any errors which may appear here and reserves
the right to make changes without notice. Please consult CET or your local representative for
the latest product specifications.
DANGER
This symbol indicates the presence of danger that may result in severe injury or death and
permanent equipment damage if proper precautions are not taken during the installation,
operation or maintenance of the device.
CAUTION
This symbol indicates the potential of personal injury or equipment damage if proper
precautions are not taken during the installation, operation or maintenance of the device.
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DANGER Failure to observe the following instructions may result in severe injury or
death and/or equipment damage.
Installation, operation and maintenance of the device should only be
performed by qualified, competent personnel that have the appropriate
training and experience with high voltage and current devices. The device must
be installed in accordance with all local and national electrical codes.
Ensure that all incoming AC power and other power sources are turned OFF
before performing any work on the device.
Before connecting the device to the power source, check the label on top of
the device to ensure that it is equipped with the appropriate power supply, and
the correct voltage and current input specifications for your application.
During normal operation of the device, hazardous voltages are present on its
terminal strips and throughout the connected potential transformers (PT) and
current transformers (CT). PT and CT secondary circuits are capable of
generating lethal voltages and currents with their primary circuits energized.
Follow standard safety precautions while performing any installation or service
work (i.e. removing PT fuses, shorting CT secondaries, …etc).
Do not use the device for primary protection functions where failure of the
device can cause fire, injury or death. The device should only be used for
shadow protection if needed.
Under no circumstances should the device be connected to a power source if
it is damaged.
To prevent potential fire or shock hazard, do not expose the device to rain or
moisture.
Setup procedures must be performed only by qualified personnel familiar with
the instrument and its associated electrical equipment.
DO NOT open the instrument under any circumstances.
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Limited warranty
CET offers the customer a minimum of 12-month functional warranty on the
device for faulty parts or workmanship from the date of dispatch from the
distributor. This warranty is on a return to factory for repair basis.
CET does not accept liability for any damage caused by device malfunctions. CET
accepts no responsibility for the suitability of the device to the application for
which it was purchased.
Failure to install, set up or operate the device according to the instructions herein
will void the warranty.
Only CET’s duly authorized representative may open your device. The unit should
only be opened in a fully anti-static environment. Failure to do so may damage
the electronic components and will void the warranty.
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Table of Contents
Chapter 1 Introduction ........................................................................................................................ 7
1.1 Overview............................................................................................................................... 7
1.2 Features ................................................................................................................................ 7
1.3 Getting more information ..................................................................................................... 8
Chapter 2 Installation .......................................................................................................................... 9
2.1 Appearance ........................................................................................................................... 9
2.2 Dimensions ......................................................................................................................... 10
2.2.1 Main Unit ................................................................................................................. 10
2.2.2 Terminal ................................................................................................................... 10
2.2.3 Residual Current CTs ................................................................................................ 11
2.2.4 PT100 ....................................................................................................................... 12
2.3 Mounting ............................................................................................................................ 12
2.4 RS-485 Wiring ..................................................................................................................... 14
2.5 Digital Output Wiring .......................................................................................................... 14
2.6 Residual Current Input Wiring ............................................................................................. 14
2.7 RTD Input Wiring ................................................................................................................. 15
2.8 Power Supply Wiring ........................................................................................................... 15
Chapter 3 Front Panel ....................................................................................................................... 16
3.1 LED Indicator ....................................................................................................................... 16
3.2 Buttons ............................................................................................................................... 16
3.3 LED Display ......................................................................................................................... 17
3.3.1 LED Display Symbols ................................................................................................. 17
3.3.2 LED Testing ............................................................................................................... 17
3.3.3 Default Display ......................................................................................................... 17
3.3.4 Data Display ............................................................................................................. 18
3.3.5 SOE Display .............................................................................................................. 18
3.4 Setup Configuration ............................................................................................................ 19
3.4.1 Making Setup Changes ............................................................................................. 19
3.4.2 Setup Menu ............................................................................................................. 20
3.4.3 Configuration ........................................................................................................... 21
Chapter 4 Applications ...................................................................................................................... 23
4.1 Condition Monitoring .......................................................................................................... 23
4.1.1 Residual Current Monitoring .................................................................................... 23
4.1.2 Temperature Alarm .................................................................................................. 23
4.2 Digital Output ..................................................................................................................... 25
4.3 SOE Log ............................................................................................................................... 25
Chapter 5 Modbus Register Map ....................................................................................................... 26
5.1 Basic Measurements ........................................................................................................... 26
5.2 SOE Log ............................................................................................................................... 27
5.3 Device Setup ....................................................................................................................... 28
5.4 Time .................................................................................................................................... 29
5.5 Remote Control ................................................................................................................... 30
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5.6 Device Information.............................................................................................................. 30
Appendix A Technical Specifications .................................................................................................. 31
Appendix B Standards of Compliance ................................................................................................ 32
Appendix C Ordering Guide ............................................................................................................... 33
Contact us ......................................................................................................................................... 34
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Chapter 1 Introduction
This manual explains how to use the PMC-T402 Temperature & Iresidual Monitor.
This chapter provides an overview of the PMC-T402 and summarizes many of its key features.
1.1 Overview
The PMC-T402 is CET’s latest offer for the Temperature (RTD) and Residual Current monitoring for the
Commercial and Industrial markets. Housed in a compact form factor measuring only
72(L)×72(H)×87.8(D)mm, the PMC-T402 can be used as a stand-alone device that offers real-time
monitoring and alarming of Residual Current and Temperature with its LED display, Front Panel buttons,
1xDO for Alarm Output or General Purpose Control and a built-in Alarm Buzzer. With the standard RS-
485 port and Modbus RTU protocol support, the PMC-T402 becomes a vital component of an
intelligent, centralized Condition Monitoring.
Intelligent Electrical Fire and Condition Monitoring for Industrial or Commercial facilities
Industrial and Commercial Electrical Power System
AC Low Voltage Distribution System
Condition monitoring of electrical equipment
1.2 Features
Ease of use
Bright 2-line LED display with high visibility for Temperature and Residual Current measurements
LED Indicators for Run, Fault, Warning, Alarm, Comm. Activities, Measurement Channel and Unit
indicators
Built-in Alarm Buzzer
Password-protected setup via front panel or free PMC Setup software
Panel or DIN Rail (with adapter) Mount
Support Firmware Upgrade over Communications
Residual Current Measurement
4 channels Residual Current Input (CT not included)
Two Setpoint Alarm Levels between 20 and 1000mA
Temperature Measurement
4 channels RTD Input (PT100 sensor not included)
Two Setpoint Alarm levels between 45°C and 140°C
SOE Log
64 events time-stamped to ±1ms resolution
Setup changes, Setpoint Alarms, Power Reset …etc.
Digital Output
1 Form A mechanical DO (3A @ 250VAC or 30VDC)
Can be used for Alarm Output or General Purpose Control
Communications
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1xRS-485 port @ 9600bps, 8E1
Modbus RTU protocol
1.3 Getting more information
Additional information is available from CET via the following sources:
Visit www.cet-global.com
Contact your local representative
Contact CET directly via email at [email protected]
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Chapter 2 Installation
2.1 Appearance
Figure 2-1 Appearance
Caution
Installation of the PMC-T402 should only be performed by qualified, competent personnel
that have the appropriate training and experience with high voltage and current devices.
The monitor must be installed in accordance with all local and national electrical codes.
During the operation of the monitor, hazardous voltages are present at the input terminals.
Failure to observe precautions can result in serious or even fatal injury and equipment
damage.
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2.2 Dimensions
2.2.1 Main Unit
Figure 2-2 Main Unit Dimensions
2.2.2 Terminal
Figure 2-3 Terminal Dimensions
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Terminal Terminal Dimension (mm) Wire Size (mm2) Max. Torque 1 DO & RS-485
2.5 x 2.8 1.5 4.5 kgf.cm/M2.5 (3.9 lb-in) 2 TCn
3 IRn
4 Power Supply 6.0 x 6.0 1.0mm2 - 2.5mm2 (14AWG - 22AWG)
6.0 kgf.cm/M3 (5.2 lb-in)
Table 2-1 Terminal Dimensions
2.2.3 Residual Current CTs
PMC-MIR-46 (160A, Ø=46mm)
Figure 2-4 PMC-MIR-46 Dimensions
PMC-MIR-80 (400A, Ø=80mm)
Figure 2-5 PMC-MIR-80 Dimensions
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PMC-MIR-120 (1000A, Ø=120mm)
Figure 2-6 PMC-MIR-120 Dimensions
PMC-MIR-220x50 (630A, 220x50mm)
Figure 2-7 PMC-MIR-220x50 Dimensions
2.2.4 PT100
Figure 2-8 PT100 Dimensions
2.3 Mounting
The PMC-T402 should be installed in a dry environment with no dust and kept away from heat,
radiation and electrical noise source. The PMC-T402 supports two installation modes: Panel mount
and DIN-Rail mount.
Panel Installation steps:
o Remove the installation clips from the PMC-T402
o Fit the PMC-T402 through a 68mm x 68mm cutout as shown in Figure 2-9
o Re-install the installation clips and push the clips tightly against the panel to secure the PMC-
T402
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Figure 2-9 Panel Installation
DIN-Rail Installation steps:
o Before installation, please make sure that the DIN rail and the adapter are already in place.
o Remove the installation clips from the PMC-T402
o Fit the PMC-T402 through the adapter as shown in Figure 2-10
o Re-install the installation clips and push the clips tightly against the adapter to secure the
PMC-T402
Figure 2-10 DIN-Rail Installation
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2.4 RS-485 Wiring
The PMC-T402 provides a standard RS-485 port that supports the Modbus RTU protocol. Up to 32
devices can be connected on a RS-485 bus. The overall length of the RS-485 cable connecting all
devices should not exceed 1200m.
If the master station does not have a RS-485 communications port, a RS-232/RS-485 or USB/RS-485
converter with optically isolated outputs and surge protection should be used. The following figure
illustrates the RS-485 connections on the PMC-T402.
Figure 2-11 RS-485 Connections
2.5 Digital Output Wiring
The following figure illustrates the Digital Output connections on the PMC-T402:
Figure 2-12 DO Connections
2.6 Residual Current Input Wiring
The following figures illustrate the Residual Current Input connection on the PMC-T402 and typical
wiring with a 3P4W system, respectively:
Figure 2-13 Residual Current Input Connections
Notes:
1) The Residual Current terminals (either IR11 or IR12) should be left open and should not be connected to ground if unused. Otherwise, doing so would damage the device.
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2) The alarming feature of the Residual Current measurement is disabled by default and can be enabled via the Front Panel or
through communications. 3) Please ensure that the device power is OFF when connecting the Residual Current CT.
2.7 RTD Input Wiring
The following figure illustrates the Temperature Input connections on the PMC-T402:
Figure 2-14 Temperature Input Connections
Notes:
1) The alarming feature of the Temperature measurement is disabled by default and can be enabled via the Front Panel or through communications. 2) Please ensure that the device power is OFF when connecting the RTD.
2.8 Power Supply Wiring
The following figure illustrates the Power Supply connections on the PMC-T402:
Figure 2-15 Power Supply Connections
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Chapter 3 Front Panel
The PMC-T402 has a bright 2-line LED display and 4 buttons for both data display and setup
configuration purposes.
Figure 3-1 Front Panel Display
3.1 LED Indicator
There are 17 LED indicators on the PMC-T402’s front panel as described below:
LED Indicator Color Description Run Green Blinking when the system is running normally
IR1~IR4 TC1~TC4 Green Lit if the corresponding IRn or TCn measurement or Alarm/Fault event is
displayed Warn Red Lit if any measurement has breached the Warning Setpoint Limit Alarm Red Lit if any measurement has breached its Alarm Setpoint Limit Mute Green Lit if the activated buzzer is muted (by pressing < /Mute> button)
Comm. Green Blinking when communicating mA/°C/s Green Lit to display the present measurement unit
Table 3-1 LED Indicators
3.2 Buttons
Buttons Data Display Mode Setup Configuration Mode Alarm/Fault Mode
< /Diag.>
Pressing this button scrolls to the next available parameter or menu item.
If the selected parameters is a numeric value, pressing this button moves the cursor to the left by one position. Once the cursor has reached the left most digit, pressing this button returns to the first digit.
Pressing this button queries other Fault or Alarm events under the event display screen.
< /Mute>
Pressing this button scrolls to the previous available parameter or menu item.
If the selected parameter is a numeric value, pressing this button increments the selected digit. Once the number reaches to 9, pressing this button again will become to 0.
If the selected parameter is an enumerated value, pressing this button scrolls through the enumerated
When the buzzer is active due to an Alarm or a Fault, pressing this button for one second mutes the sound.
Under an Alarm event screen, pressing this button switches to the Fault event screen.
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list.
< /Enter> This button is ignored in the Data Display mode.
Pressing this button for three seconds toggles between Data Display mode and Setup Configuration Mode.
Once inside the Setup Configuration mode, pressing this button selects a parameter for modification. After changing the parameter, pressing this button again saves the new setting into memory.
This button is ignored in the Alarm/Fault Mode.
< /Esc>
Pressing this button returns to the previous menu level.
Press this button to discard the changes or cancel the current operation.
Pressing this button for three seconds to reset the Alarm and Fault.
Table 3-2 Buttons Description
3.3 LED Display
3.3.1 LED Display Symbols
The following table shows the special LED display symbols:
Label Description
A B C D E F
G H I J K L
M N O P Q R
S T U V W Y
0 1 2 3 4
5 6 7 8 9
Table 3-3 LED Display Segments
3.3.2 LED Testing
Pressing < /Diag.> button for one second enters the LED Testing mode. During testing, all LED
segments and indicators are illuminated for 1 second. This cycle will repeat 6 times to allow for the
detection of faulty LED segments or indicators. In addition, the Alarm Buzzer will sound for 3 seconds
first and then short sound for 3 times during illumination LED segments and indicators. The LED will
return to its normal display mode afterwards.
3.3.3 Default Display
The PMC-T402 has a Default Display that shows the IR1 and IR2 parameters as shown below. The user
can use the < /Diag.> and < /Mute>> buttons to scroll and display other parameters. Please refer
to Section 3.2 above for a complete description of the front panel and button operations.
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Figure 3-2 Default Display
3.3.4 Data Display
The following table illustrates the available measurements under the Data Display Mode.
Menu Display screens Measurements
IRn Display 1 IR1 IR2 Display 2 IR3 IR4
TCn Display 1 TC1 TC2 Display 2 TC3 TC4
DO Display 1 DO Status
Table 3-4 PMC-T402 Data Display Pages
3.3.5 SOE Display
The PMC-T402 can display Alarm/Fault events on its LED. The users can scroll the display screens by
pressing < /Diag.> button. When there is an Alarm or a Fault event:
The Front Panel displays the Alarm/Fault channel and the detailed information
The Alarm buzzer would sound
The correspond IRn/TCn LED indicator and Alarm/Fault indicator would be lit
The Alarm event has a higher priority than the Fault event. Users can press < /Mute> button to switch
to the Fault event screen. Once there is no more Alarm or Fault event, the display will return to the
Default Display screen automatically. In addition, users can query other Fault or Alarm events by
pressing < /Diag.> under an event screen.
Examples of Event Log Display:
IRn/TCn Alarm Events:
Figure 3-3 IRn/TCn Alarm Events
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IRn/TCn Fault Events:
Figure 3-4 IRn/TCn Fault Events
3.4 Setup Configuration
3.4.1 Making Setup Changes
1) Entering the Password:
Press < /Enter> for three seconds to enter Setup Configuration mode, and the LED displays
PROG.
Press < /Diag.> to advance to the Password page.
A correct password must be entered before changes are allowed. The factory default password is
“0000”.
Press< /Diag.> to shift the cursor to the left by one position and press < /Mute> to increment
the numeric value for the password.
When the password has been entered, pressing < /Diag.> or < /Mute> advances to the setup
menu if the password is correct.
2) Selecting a parameter to change:
Press < /Diag.>or < /Mute> to scroll to the desired sub-menu or parameter.
Press < /Enter> to select the sub-menu or parameter. Once a parameter has been selected, its
value will blink.
3) Changing and saving a setup parameter:
For a Numeric parameter, press < /Diag.> to shift the cursor to the left by one position. Press <
/Mute> to increment the numeric value
For an Enumerated parameter, press < /Mute> to scroll through the enumerated list.
After modification, press < /Enter> to save the change into memory or < /Esc> to exit the
currently selected parameter without change.
Repeat step 3) until all setup parameters have been changed.
4) Exiting the Setup Mode
Press < /Enter> for three seconds to return to the Display Mode.
Also, the Setup Mode will be automatically exited if there is a period of inactivity of 5 minutes or
longer.
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3.4.2 Setup Menu
Figure 3-5 Setup Menu
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3.4.3 Configuration
The Setup Configuration mode provides access to the following setup parameters:
Label Description Range Default Menu
Main Sub PROG Setup Configuration / / PASS Enter Password 0 to 9999 0 COM1 Set Comm. Parameters Yes/No
Id Set Unit ID 1 to 247 100 FP Set Setpoint Parameters Yes/No
IRn Set IRn Alarm parameters (n=1, 2, 3, 4)
SEL IRn Alarm Setpoint 0=OFF
1=DO Alarm 2=No DO Alarm
0
VAL IRn Alarm Limit 20 to 1000 mA 500 dLY IRn Alarm Time Delay 0 to 20s 5s
PSEL IRn Warning Setpoint 0=OFF
1=DO Warning 2=No DO Warning
0
rAIo IRn Warning Level Ratio 0.1 to 0.8 0.6 PdLY IRn Warning Time Delay 0 to 20s 5s
TCn Set TCn Alarm parameters (n=1, 2, 3, 4)
SEL TCn Alarm Setpoint 0=OFF
1= DO Alarm 2=No DO Alarm
0
VAL TCn Alarm Limit 45 to 140°C 100°C dLY TCn Alarm Time Delay 0 to 40s 0s
PSEL TCn Warning Setpoint 0=OFF
1=DO Warning 2=No DO Warning
0
rAIo TCn Warning Level 0.1 to 0.8 0.6 PdLY TCn Warning Time Delay 0 to 40s 0s
DO Set DO parameter do DO pulse width 0 to 6000 (x0.1) s 1.0s
RES FP Set other Alarm parameters
TCCP Enable RTD Compensation2 0=OFF 1=ON 1
TCTH Temperature threshold3 0 to 45°C 0°C IRTH Residual Current threshold3 10 to 500mA 20mA
dT Set Clock D Enter the Current Date YY-MM-DD / T Enter the Current Time HH:MM:SS /
MT PASS SET Set New Password
nEW Enter New Password 0 to 9999 0 SoE
ALM SoE Display Alarm events FAIL SoE Display Fault events MT SoE Display Maintenance events Clr SoE Clear SOE Yes/No
InFo View Device Information (Read Only) Yes/No
V Firmware Version For example, 1.00.00 means the firmware version is V1.10.00.
/
Pro Protocol Version e.g. 1.0 means V1.0 / d Firmware Update Date e.g. 20160915 /
Table 3-5 Setup Parameters
Notes: 1) The PMC-T402 only supports the configuration of Unit ID for its Com port. The default settings
for Baud Rate and Data Format are 9600 bps and 8E1, respectively and cannot be changed from the Front Panel.
2) In general, the RTD sensor comes standard with a 3m wire, and the wiring resistance may lead to a relatively large error, it is recommended that the RTD Sensor Compensation be used to reduce
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the error if the length of the wire exceeds 3m. 3) When the measurements of the Residual Current or Temperature are less than the Residual
Current or Temperature Threshold, the measurements will be displayed as 0.
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Chapter 4 Applications
4.1 Condition Monitoring
PMC-T402 provides intelligent condition monitoring of Residual Current and Temperature through
external Residual CTs and PT100 Temperature Probes. It can determine if the sensors are working
normally, the setpoint limits have been breached or if the wires of the sensors are broken. The device
can be configured to generate an alarm using the on-board buzzer and activate the Digital Output for
external control when a measurement exceeds the pre-set alarm limit. In addition, a SOE Event would
be generated.
4.1.1 Residual Current Monitoring
The PMC-T402 supports up to four Residual Current Inputs and provides two Setpoint levels between
20 and 1000mA: Warning and Alarm. If the Residual Current measurements exceed the pre-set limits,
the Residual Current Setpoint will become active. The monitoring of Residual Current provides an
indication of the amount of Leakage Current existing in the electrical system as a result of degraded
insulation or poor wiring and acts as an early warning system to alert users of potential safety hazards
as well as the health of the electrical system.
The PMC-T402’s Residual Current inputs are required to be paired with CET’s PMC-MIR series of
Residual CT. Please refer to Section 2.2.3 and Appendix A for their dimensions and specifications.
Residual Current Setpoint parameters can be programmed via the Front Panel or through
communications:
Setup Parameter Definition Default IRn Alarm Setpoint OFF / DO Alarm / No DO Alarm OFF Alarm Limit 20 to 2000mA 500mA Time Delay 0 to 20s 5s Active Condition Iresidual ≥ Alarm Limit Inactive Condition Iresidual < 0.9 * Alarm Limit Alarm Trigger SOE, Alarm Buzzer, LED and/or DO
Table 4-1 Residual Current Alarm Setpoint Parameters
Setup Parameter Definition Default IRn Warning Setpoint OFF / DO Warning / No DO Warning OFF Warning Level 0.1 ~ 0.8 0.6 Time Delay 0 to 20s 5s Active Condition Iresidual ≥ Alarm Limit * Warning Level Inactive Condition Iresidual < 0.9 * [Alarm Limit * Warning Level] Warning Trigger SOE, Alarm Buzzer, LED and/or DO
Table 4-2 Residual Current Warning Setpoint Parameters
The following figures illustrate the logic diagrams of the Residual Current Alarm and Warning.
Figure 4-1 Residual Current Alarm Logic Diagram
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Figure 4-2 Residual Current Warning Logic Diagram
Notes:
1) The IRn Alarm or Warning must return to Normal first before a new Alarm or Warning would be generated.
4.1.2 Temperature Alarm
The PMC-T402 supports up to four PT100 Temperature Inputs and provides two Setpoint levels
between 45 and 140°C: Warning and Alarm. If the temperature measurements exceed the pre-set
alarm limit, the Temperature Setpoint will become active. The PMC-T402’s Temperature inputs provide
a way to monitor the temperature condition of a certain piece of equipment and acts as an early
warning system to alert users of potential safety hazards as a result of over-heating.
The PMT-T402’s Temperature inputs are required to be pared with external 2-wire PT100 sensors,
please refer to Section 2.2.4 and Appendix A for its dimensions and specifications.
The Temperature Setpoint parameters can be programmed via the Front Panel or through the
communications:
Setup Parameter Definition Default TCn Alarm Setpoint OFF / DO Alarm / No DO Alarm OFF Alarm Limit 45 to 140 °C 100 °C Time Delay 0 to 40s 5s Active Condition Temperature ≥ Alarm Limit Inactive Condition Temperature < 0.9 * Alarm Limit Alarm Trigger SOE, Alarm Buzzer, LED and/or DO
Table 4-3 Temperature Alarm Setpoint Parameters
Setup Parameter Definition Default TCn Warning Setpoint OFF / DO Warning DO / No DO Warning OFF Warning Level 0.1 ~ 0.8 0.6 Time Delay 0 to 40s 5s Active Condition Temperature ≥ Alarm Limit * Warning Level Inactive Condition Temperature < 0.9*[Alarm Limit * Warning Level] Warning Trigger SOE, Alarm Buzzer, LED and/or DO
Table 4-4 Temperature Warning Setpoint Parameters
The following figures illustrate the logic diagrams of the Temperature Alarm and Warning.
Figure 4-3 Temperature Alarm Logic Diagram
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Figure 4-4 Temperature Warning Logic Diagram
Notes:
1) The TCn Alarm or Warning must return to Normal first before a new Alarm or Warning would be generate.
4.2 Digital Output
The PMC-T402 comes standard with one Form A mechanical DO (3A @ 250VAC or 30VDC). Digital
Outputs are normally used for Alarm Output or Remote Control applications.
1) Alarm Output The Residual Current Alarm and Temperature Alarm Setpoint can
be configured to trigger DO actions in response to the Residual
Current Alarm or Temperature Alarm becoming active. Please
refer to Section 4.1.1 and 4.1.2 for a detailed description.
2) Remote Control Remotely operated over communications via our free PMC Setup
software or PecStar® iEMS Integrated Energy Management
System.
The Remote Control has a higher priority than the Alarm Output, meaning that even if the DO has been
configured to operate in response to an Alarm, it may still be overridden for remote control operation.
4.3 SOE Log
The PMC-T402 has a SOE Log that can store up to 64 events such as Power-On, Alarm, DO action and
Setup changes …etc. in its non-volatile memory. Each event record includes an Event Classification, its
relevant parameter values and a timestamp in ±1 ms resolution.
All events can be retrieved via the Front Panel or through communications. If there are more than 64
events, the newest event will replace the oldest event on a First-In-First-Out basis. The SOE Log can be
reset from the Front Panel or via communications.
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Chapter 5 Modbus Register Map
This chapter provides a complete description of the Modbus register map (Protocol Version 1.1) for
the PMC-T402 to facilitate the development of 3rd party communications driver for accessing
information on the PMC-T402. For a complete Modbus Protocol Specification, please visit
http://www.modbus.org. The PMC-T402 supports the following Modbus functions:
1) Read Holding Registers (Function Code 0x03)
2) Force Single Coil (Function Code 0x05)
3) Preset Multiple Registers (Function Code 0x10)
The following table provides a description of the different data formats used for the Modbus registers:
Format Description UINT16/INT16 Unsigned/Signed 16-bit Integer UINT32/INT32 Unsigned/Signed 32-bit Integer
Float IEEE 754 32-bit Single Precision Floating Point Number
5.1 Basic Measurements
Register Property Description Format Scale Unit 40000 RO SOE Pointer1 UINT32 40002 RO Iresidual Self-Diagnostic Status2 UINT16 40003 RO Temp. Self-Diagnostic Status3 UINT16 40004 RO Iresidual Alarm Status4 UINT16 40005 RO Iresidual Warning Status5 UINT16 40006 RO Temp. Alarm Status6 UINT16 40007 RO Temp. Warning Status7 UINT16 40008 RO Reserved UINT16 40009 RO Reserved UINT16 40010 RO Global Fault/Alarm Status8 UINT16 40011 RO DO Status9 UINT16 40012 RO IR1 (RMS)10 UINT16
x10 mA 40013 RO IR2 (RMS)10 UINT16 40014 RO IR3 (RMS)10 UINT16 40015 RO IR4 (RMS)10 UINT16 40016 RO TC110 INT16
x10 °C 40017 RO TC210 INT16 40018 RO TC310 INT16 40019 RO TC410 INT16 40020 RO IR1 (Fundamental) UINT16
x10 mA 40021 RO IR2 (Fundamental) UINT16 40022 RO IR3 (Fundamental) UINT16 40023 RO IR4 (Fundamental) UINT16
Table 5-1 Basic Measurements
Notes: 1) The range of the SOE Log Pointer is between 0 and 0xFFFFFFFF, and it is incremented by one for
every new log generated and will roll over to 0 if its current value is 0xFFFFFFFF. A value of zero indicates that the SOE does not contain any Log. If a Clear SOE Log is performed via the Front Panel or through communications, the SOE Log Pointer will be reset to zero.
Use the following equation to determine the latest log location:
Latest Log Location = Modulo [SOE Log Pointer / Log Depth] Where SOE Log Depth = 64 (fixed)
2) For the Iresidual Self-Diagnostic Status register, the bit values of B0 to B3 represent the status of the external CT for IR1 to IR4, respectively, with “0” meaning Normal and “1” meaning Abnormal.
3) For the Temp. Self-Diagnostic Status register, the bit values of B0 to B3 represent the status of the external Temperature Probe for TC1 to TC4, respectively, with “0” meaning Normal and “1” meaning Abnormal.
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4) For the Iresidual Alarm Status register, the bit values of B0 to B3 represent the Alarm Status of IR1 to IR4, respectively, with “1” meaning Active and “0” meaning Inactive.
5) For the Iresidual Warning Status register, the bit values of B0 to B3 represent the Warning Status of IR1 to IR4, respectively, with “1” meaning Active and “0” meaning Inactive.
6) For the Temp. Alarm Status register, the bit values of B0 to B3 represent the Alarm Status of TC1 to TC4, respectively, with “1” meaning Active and “0” meaning Inactive.
7) For the Temp. Warning Status register, the bit values of B0 to B3 represent the Warning Status of TC1 to TC4, respectively, with “1” meaning Active and “0” meaning Inactive.
8) The table below illustrates the bit values of the Global Fault/Alarm Status register, where “1” means Active and “0” means Inactive.
Bit3 Bit2 Bit1 Bit0 IRn Warning IRn Alarm RTD Probe Fault Residual CT Fault
Bit15 Bit14 Bit13~Bit6 Bit5 Bit4 Global Alarm Global Fault Reserved TCn Warning TCn Alarm
Table 5-2 Global Fault/Alarm Status Register
Bit 0/Bit 1/Bit 2/Bit 3/Bit 4/Bit 5 = 1 if there is any Residual CT/RTD Probe Fault, IRn or TCn
Alarm/Warning.
Bit14 (Global Fault) = 1 if there is either an Iresidual or Temperature Fault.
Bit 15 (Global Alarm) = 1 if there is either an IRn or TCn Alarm/Warning. 9) For the DO Status register, the bit value of B0 represents the status of DO, with “1” meaning
Active (Closed) and “0” meaning Inactive (Open).
10) If the Residual CT or RTD Probe is detected as Fault, the corresponding IRn RMS or TCn register’s reading is 0x7FFF.
5.2 SOE Log
The SOE Log Pointer points to the register address within the SOE Log where the next event will be
stored. The following formula is used to determine the register address of the most recent SOE event
referenced by the SOE Log Pointer value:
Register Address = 52000 + Modulo(SOE Log Pointer-1/64)*8
Register Property Description Format 52000~52007 RO Event 1
See Table 5-4 SOE Log Data
Structure
52008~52015 RO Event 2 52016~52023 RO Event 3 52024~52031 RO Event 4 52032~52039 RO Event 5 52040~52047 RO Event 6 52048~52055 RO Event 7
… … 52504~52511 RO Event 64
Table 5-3 SOE Log
Notes: 1) SOE Log Data Structure
Offset Property Description Unit +0 RO Log Position 0 to 63
+1 RO High-order Byte: Event Classification2 RO Low-order Byte: Sub-Classification2
+2 RO Record Time: Year 0-99 (Year-2000) RO Record Time: Month 1 to 12
+3 RO Record Time: Day 1 to 31 RO Record Time: Hour 0 to 23
+4 RO Record Time: Minute 0 to 59 RO Record Time: Second 0 to 59
+5 RO Record Time: Millisecond 0 to 999 +6 RO Event Value2-Low-order Byte +7 RO Event Value2-High-order Byte -
Table 5-4 SOE Log Data Structure
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2) SOE Classification
Table 5-5 SOE Classification
5.3 Device Setup
Register Property Description Format Range, Default*
51000 RW Alarm Buzzer UINT16 0 = Disabled
1 = Intermittent* 2 = Continuous
51001 RW Fault Buzzer UINT16 0 = Disabled
1 = Intermittent* 2 = Continuous
51002 RW Alarm Reset Mode UINT16 0 = Manual*, 1 = Auto 51003 RW RTD Probe Compensation UINT16 0 = Disabled, 1 = Enabled* 51004 RW Temp. Threshold UINT16 0 to 45°C, 0°C* 51005 RW Iresidual Threshold UINT16 10 to 500 mA, 20 mA*
51006 RW DO Pulse Width UINT16 0 to 6000 (0.1s), 1.0s* 0=Latch Mode
51007 RW Reserved UINT16 -
51008 RW IRn Alarm Setpoint UINT16 0 = IRn RMS* 1 = IRn Fundamental
51009 RW Reserved UINT16 - 51010 RW IR1 Setpoint UINT16 See Note 1), 0* 51011 RW IR1 Alarm Limit UINT16 20 to 1000 mA, 500 mA* 51012 RW IR1 Alarm Time Delay UINT16 0 to 20s, 5s* 51013 RW IR1 Warning Level UINT16 0.1 to 0.8, 0.6*
Event Classification
Sub- Classification Event Value Description
1 1 Reserved 2 Reserved 3 1/0 DO Operated/Released
2
1
Triggered Value
TC1 Alarm 2 TC2 Alarm 3 TC3 Alarm 4 TC4 Alarm 5 IR1 Alarm 6 IR2 Alarm 7 IR3 Alarm 8 IR4 Alarm 9 Reserved
10 TC1 Warning 11 TC2 Warning 12 TC3 Warning 13 TC4 Warning 14 IR1 Warning 15 IR2 Warning 16 IR3 Warning 17 IR4 Warning
18~19 Reserved 20 0 TC1 RTD Probe Fault 21 0 TC2 RTD Probe Fault 22 0 TC3 RTD Probe Fault 23 0 TC4 RTD Probe Fault 24 0 IR1 Residual CT Fault 25 0 IR2 Residual CT Fault 26 0 IR3 Residual CT Fault 27 0 IR4 Residual CT Fault
3
1 0 System Parameter Fault 2 0 Calibration Parameter Fault 3 0 Ferroelectric Fault 4 0 AD Fault
4
1 0 Setup Changed via Communication 2 0 Clear SOE via Communication 3 0 Power On 4 0 Setup Changed via Front Panel 5 0 Clear SOE via the Front Panel
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51014 RW IR1 Warning Delay UINT16 0 to 20s, 5s* 51015 RW IR2 Setpoint UINT16 See Note 1), 0* 51016 RW IR2 Alarm Limit UINT16 20 to 1000 mA, 500mA* 51017 RW IR2 Alarm Time Delay UINT16 0 to 20s, 5s* 51018 RW IR2 Warning Level UINT16 0.1 to 0.8, 0.6* 51019 RW IR2 Warning Time Delay UINT16 0 to 20s, 5s* 51020 RW IR3 Setpoint UINT16 See Note 1), 0* 51021 RW IR3 Alarm Limit UINT16 20 to 1000 mA, 500 mA* 51022 RW IR3 Alarm Time Delay UINT16 0 to 20s, 5s* 51023 RW IR3 Warning Level UINT16 0.1 to 0.8, 0.6* 51024 RW IR3 Warning Time Delay UINT16 0 to 20s, 5s* 51025 RW IR4 Setpoint UINT16 See Note 1), 0* 51026 RW IR4 Alarm Limit UINT16 20 to 1000 mA, 500 mA* 51027 RW IR4 Alarm Time Delay UINT16 0 to 20s, 5s* 51028 RW IR4 Warning Level UINT16 0.1 to 0.8, 0.6* 51029 RW IR4 Warning Time Delay UINT16 0 to 20s, 5s* 51030 RW TC1 Setpoint UINT16 See Note 1), 0* 51031 RW TC1 Alarm Limit UINT16 45 to 140 °C, 100°C* 51032 RW TC1 Alarm Time Delay UINT16 0 to 40s, 0s* 51033 RW TC1 Warning Level UINT16 0.1 to 0.8, 0.6* 51034 RW TC1 Warning Time Delay UINT16 0 to 40s, 0s* 51035 RW TC2 Setpoint UINT16 See Note 1), 0* 51036 RW TC2 Alarm Limit UINT16 45 to 140 °C, 100°C* 51037 RW TC2 Alarm Time Delay UINT16 0 to 40s, 0s* 51038 RW TC2 Warning Level UINT16 0.1 to 0.8, 0.6* 51039 RW TC2 Warning Time Delay UINT16 0 to 40s, 0s* 51040 RW TC3 Setpoint UINT16 See Note 1), 0* 51041 RW TC3 Alarm Limit UINT16 45 to 140 °C, 100°C* 51042 RW TC3 Alarm Time Delay UINT16 0 to 40s, 0s* 51043 RW TC3 Warning Level UINT16 0.1 to 0.8, 0.6* 51044 RW TC3 Warning Time Delay UINT16 0 to 40s, 0s* 51045 RW TC4 Setpoint UINT16 See Note 1), 0* 51046 RW TC4 Alarm Limit UINT16 45 to 140 °C, 100°C* 51047 RW TC4 Alarm Time Delay UINT16 0 to 40s, 0s* 51048 RW TC4 Warning Level UINT16 0.1 to 0.8, 0.6* 51049 RW TC4 Warning Time Delay UINT16 0 to 40s, 0s*
51050~51120 RW Reserved UINT16 51121 RW Unit ID UINT16 1 to 247, 100* 51122 RW Baud Rate1 UINT16 0=9600*, 1=19200
51123 RW Comm. Config. UINT16 0=8N2, 1=8O1, 2=8E1* 3=8N1, 4=8O2, 5=8E2
Table 5-5 Basic Setup Parameters
Notes: 1) The following table illustrates the IRn/TCn Setpoint Register:
Bit15~Bit4 Bit3~Bit2 Bit1~Bit0
Reserved 00: OFF
01: DO Warning 10: No DO Warning
00: OFF 01: DO Alarm
10: No DO Alarm Table 5-6 IRn/TCn Setpoint Register
5.4 Time
There is one set of Time registers supported by the PMC-T402 – Year / Month / Day / Hour / Minute /
Second (Register # 60000 to 60002). All registers within a Time register set must be written in a single
transaction. Writing to the Millisecond register (60003) is optional during a Time Set operation. When
broadcasting time, the function code must be set to 0x10 (Pre-set Multiple Registers). Incorrect date
or time values will be rejected by the device. In addition, attempting to write a Time value less than
Jan 1, 2000 00:00:00 will be rejected.
Register Property Description Format Note
60000 RW High-order Byte: Year
UINT16 0-37 (Year-2000)
Low-order Byte: Month 1 to 12 60001 RW High-order Byte: Day UINT16 1 to 31
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Low-order Byte: Hour 0 to 23
60002 RW High-order Byte: Minute
UINT16 0 to 59
Low-order Byte: Second 0 to 59 60003 RW Millisecond UINT16 0 to 999
Table 5-8 Time Registers
5.5 Remote Control
Before executing an Open, Close or Reset command on a target register, it must be “Armed” first. This
is achieved by writing the value 0xFF00 to the appropriate register to “Arm” a particular Open, Close
or Reset operation. The Open, Close or Reset will be “Disarmed” automatically if an “Execute”
command is not received within 15 seconds after it has been “Armed”. If an “Execute” command is
received without first having received an “Arm” command, the PMC-T402 ignores the “Execute”
command and returns the 0x04 exception code.
Register Property Description Format Note 60064 WO Arm DO Close UINT16
Writing “0xFF00” to the register to
perform the described action.
60065 WO Execute DO Close UINT16 60066 WO Arm DO Open UINT16 60067 WO Execute DO Open UINT16
60068~60124 WO Reserved UINT16 60125 WO Buzzer Mute UINT16 60126 WO System Self-Diagnostic UINT16 60127 WO Clear SOE UINT16 60128 WO Arm Reset Alarm & Fault Register UINT16 60129 WO Execute Reset Alarm & Fault Register UINT16
Table 5-9 DO Control
5.6 Device Information
Register Property Description Format Note
60200~60219 RO Device model1 UINT16 See Note 1
60220 RO Firmware Version UINT16 e.g. 10000 shows the version is V1.00.00
60221 RO Protocol Version UINT16 e.g. 10 shows the version is V1.0
60222 RO Firmware Date: Year-2000 UINT16 e.g. 160110 means January 10, 2016
60223 RO Firmware Date: Month UINT16 60224 RO Firmware Date: Day UINT16 60225 RO Serial Number UINT32
60227-60228 RO Reserved UINT16 60229 RO Feature Code UINT16 0: 4xIR+4xTC
Table 5-10 Device Information
Notes: 1) The Device Model appears in registers 60200 to 60219 and contains the ASCII encoding of the
string “PMC-T402” as shown in the following table. Register Value(Hex) ASCII 60200 0x0050 P 60201 0x004D M 60202 0x0043 C 60203 0x002D - 60204 0x0054 T 60205 0x0034 4 60206 0x0030 0 60207 0x0032 2
60208-60219 0x20 Null
Table 5-11 ASCII Encoding of “PMC-T402”
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Appendix A Technical Specifications
RTD Temperature Inputs (TC1, TC2, TC3, TC4) RTD Type PT100 Alarm Range
2-Wire PT100 (sensor not included) 0-200°C 45-140°C
Residual Current Inputs (IR1, IR2, IR3, IR4) Standard (In) Range
0.5mA 2-200% In
Power Supply (L/+, N/-, GND) Standard Burden Frequency
95-250VAC/DC, ±10%, 47-440Hz <1.5W 50Hz/60Hz
Digital Output Type Loading
Form A Mechanical Relay 3A @ 250VAC or 30VDC
Communications Type Baud Rate Communication Format Protocol
RS-485 9600bps 8E1 (8 Data Bits, Even Parity, 1 Stop Bit) Modbus RTU
Setpoint Range Residual Current Temperature
20-1000mA in 1mA resolution 45-140°C in 1°C resolution
Buzzer Decibel 70dB (measured at 1m range)
Installation Torque Power Supply Terminals 0.6 N.m Other Terminals 0.4 N.m
Environmental conditions Operating Temperature Storage Temperature Humidity Atmospheric Pressure Pollution Degree
-25°C to +70°C -40°C to +85°C 5% to 95% non-condensing 70 kPa to 106 kPa II
Mechanical Characteristics Mounting Unit Dimensions IP Rating
Panel or DIN Rail 72(L)×72(H)×87.8(D) mm 30
Residual Current CT (not included) Load Current (Solid Core) Load Current (Split Core) Primary Input (Residual) Secondary Output Range Overload Accuracy Frequency Dielectric Strength Operating Temperature Storage Temperature
160A (PMC-MIR-46, Ø=46mm) 400A (PMC-MIR-80, Ø=80mm) 630A (PMC-MIR-220x50, 220x50mm) 1000A (PMC-MIR-120, Ø=120mm) 160A (CT553203, Ø=48mm) 225A (CT553303, Ø=68mm) 1A 0.5mA 2-200% 44A Class 0.5 (Solid Core), Class 3 (Split Core) 50 / 60Hz 3kV rms @ 1 minute -25 ~ +70°C(Solid Core), -12 ~ +45°C(Split Core) -40 ~ +85°C(Solid Core), -25 ~ +70°C(Split Core)
RTD Temperature Sensor (not included) Type Range Accuracy Cable Length Protective Tube Length
2-Wire PT100 -50°C to 200°C IEC 60751 Class B 3m, 5m or 8m 300mm
Accuracy Parameters Measurement Range Accuracy Resolution Residual Current 20 - 2000mA ±1% 0.1mA Temperature 0 - 200°C ±1°C 0.1°C
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Appendix B Standards of Compliance
Safety Requirements
CE LVD 2014 / 35 / EU EN 61010-1: 2010 EN 61010-2-030: 2010
Insulation Dielectric test Insulation resistance Impulse voltage
IEC 60255-5-2000 2kV @ 1 minute >100MΩ 5kV, 1.2/50µs
Electromagnetic Compatibility Immunity Tests
Electrostatic Discharge IEC 61000-4-2:2001 Level III Radiated Fields IEC 61000-4-3:2006 Level (10V/m) Fast Transients IEC 61000-4-4:2004 Level III Surges IEC 61000-4-5:2005 Level III Conducted Disturbances IEC 61000-4-6:1995 Level III Magnetic Fields IEC 61000-4-8:2001 Level IV Oscillatory Waves IEC 61000-4-12:1995 Level III
Mechanical Tests
Vibration Test Response IEC 60255-21-1:1998 Level I Endurance IEC 60255-21-1:1998 Level I
Shock Test Response IEC 60255-21-1:1998 Level I Endurance IEC 60255-21-1:1998 Level I
Bump Test IEC 62052-11: 2003 Level I
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Appendix C Ordering Guide
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Contact us
CET Inc.
8/F, Westside, Building 201, Terra Industrial & Tradepark,
Che Gong Miao, Shenzhen, Guangdong, P.R.China 518040
Tel: +86.755.8341.5187
Fax: +86.755.8341.0291
Email: [email protected]
Web: www.cet-global.com
