Home Products Electronic Modules Monitoring Modules MR-4x: Line Monitoring (Wirebreak) Relay

Module

MR-4x: Line Monitoring (Wirebreak) Relay Module

Overview

The MR-4C / MR-4D / MR-4L Line Monitoring (Wirebreak) Relay is a supervisory module which

continually monitors the status of the field wiring by monitoring the current passing through the

supervised loop. Each loop has a End-Of-Line Resistor (EOLR) placed at the end of the loop. When

the wire in any of the four channel breaks, the current flowing through the loop is disrupted and the

module detects this as a open-circuit fault and energizes the fault relay(s).

Features

Input Voltage: 24 VDC

Number of Monitored Channels/Loops: 4

End-of-Line Resistor: 4.7 k-ohm (supplied)

Individual Fault Indicator allows for easy location of faults.

Output Relay Contact: 3A @ 240VAC (resistive)

DIN-Rail Mountable

Applications

The MR-4C / MR-4D / MR-4L is commonly used to monitor signal loop continuity for applications

such as:

Emergency Stop Push-buttons

Smoke Detectors

and more...

Connection Diagram

MAIN MENU

Home

Products

Electronic Modules

Current Sensing

Dimmers

Diode Modules

Level Controllers

Logic Controllers

Monitoring Modules

Signal Generators

Transducers/Transmit

Marine Products

Battery Chargers

Entertainment Products

Industrial Products &

Solutions

News

About Us

Contact Us

WHO'S ONLINEWe have 1 guest online

search...

3/3/2011 MR-4x: Line Monitoring (Wirebreak) R…

pandelta.com/…/90-mr-4x-line-monit… 1/3

Specifications

Model MR-4C / MR-4D / MR-4L

Supply Voltage 24 VDC

Power

Consumption110mA (max)

Ambient Operating

Temperature-10 to +50 degC

Monitoring

Channels

Inputs for 4 Circuits (each with 4k7

End-of-Line resistor)

Individual fault LED allows for easy

location of faults

Output Contacts

MR-4C: 4 x N/C Relay Contacts (NC1,

NC2, NC3, NC4, COM)

MR-4D: 4 x N/O Relay Contacts (NO1,

NO2, NO3, NO4, COM)

MR-4L: 1 x Common Relay Contact

(NO, NC, COM)

Contact Rating: 3 Amps at 240 VAC

(resistive)

Mounting DIN Rail Mountable

Weight 300 g

Dimensions(mm) 112(H) x 55(H) x 74(D)

Dimensions

3/3/2011 MR-4x: Line Monitoring (Wirebreak) R…

pandelta.com/…/90-mr-4x-line-monit… 2/3

Last Updated on Friday, 15 October 2010 17:46

Ordering Information (Part Numbers)

MR-4C - 4-Channel Line Monitoring (Wirebreak) Module with 4 x N/C Relay Contacts (c/w 4 x

4k7 resistor)

MR-4D - 4-Channel Line Monitoring (Wirebreak) Module with 4 x N/O Relay Contacts (c/w 4 x

4k7 resistor)

MR-4L - 4-Channel Line Monitoring (Wirebreak) Module (c/w 4 x 4k7 resistor)

Copyright © 2011 Pan Delta Controls. All Rights Reserved.

3/3/2011 MR-4x: Line Monitoring (Wirebreak) R…

pandelta.com/…/90-mr-4x-line-monit… 3/3