MODEL

OPERATOR’S MANUAL

IMPORTANT NOTES:

1) This manual is valid for the following Model and associated serial numbers:

MODEL SERIAL NO. REV. NO.

2) A Change Page may be included at the end of the manual. All applicable changes andrevision number changes are documented with reference to the equipment serial num-bers. Before using this Instruction Manual, check your equipment serial number to identifyyour model. If in doubt, contact your nearest Kepco Representative, or the Kepco Docu-mentation Office in New York, (718) 461-7000, requesting the correct revision for your par-ticular model and serial number.

3) The contents of this manual are protected by copyright. Reproduction of any part can be

made only with the specific written permission of Kepco, Inc. Data subject to change without notice.

KEPCO® THE POWER SUPPLIER™

KEPCO, INC. 131-38 SANFORD AVENUE FLUSHING, NY. 11355 U.S.A. TEL (718) 461-7000 FAX (718) 767-1102email: hq@kepcopower.com World Wide Web: http://www.kepcopower.com

KEPCO INC.An ISO 9001 Company.

©2017, KEPCO, INC.P/N 243-1308-r7

BOP (M) (D) 100W, 200W, 400W BIPOLAR POWER SUPPLY

100W: BOP 20-5, BOP 50-2, BOP 100-1200W: BOP 20-10, BOP 36-6, BOP 50-4, BOP 72-3, BOP 100-2, BOP 200-1

400W: BOP 20-20, BOP 36-12, BOP 50-8, BOP 72-6, BOP 100-4

BOP 100W, 200W, 400WPOWER SUPPLY

1

MISCELLANEOUS FEATURES, PARAGRAPH 1-10B, add the following:B REAR PROGRAMMING CONNECTOR. Models supplied with the newer type PC 15 Rear Programming Connector (P/N 195-0121, see Figure 3-36) have the following changes included to accommodate the REMOTE ON/OFF REATURE found on newer models, as well as the means to compensate for capacitive loads in Voltage Mode.

TERMINAL FUNCTION DESCRIPTION

12, 14 Voltage Mode Compensating Terminals When driving a capacitive load in voltage mode, the system can become unstable. Install an external ceramic capacitor rated for 50V across pins 12 and 14 of the rear programming connector for stable operation. The value of the capacitor is correlated to the load’s capacitance. A value in the range of 0.0047mF to 0.47mF is recommended.

21 On-off Controlling Logic Establishes whether TTL “1” or “0” applied to pin 50, referenced to pin 48 turns the output on or off.No signal (default) or “1” (15V CMOS): “0” = ON, “1” = OFF“0” or short to pin 23: “1” = ON, “0” = OFF

If no signal is applied to pin 50, pin 21 can be used as a non-isolated on-off control: no signal or “1” (15V CMOS) = output ONShort to pin 23 or “0”: = output OFF

48 ISO_GND Return for ON-OFF_CTRL and for /ON_OFF_FLAG signals.

50 ON-OFF_CTRL Optically isolated signal that controls output to be either ON (enabled) or OFF (disabled). The logic of the control is established by pin 21. TTL “0” or no control = ON (default)TTL “1” = OFF ON control (default): 0V to 0.4V or no connection (open circuit) at pin 50, referenced to pin 48. Turns ON within 100S max (between 10% point of controlling signal and a) 10% point of output voltage for voltage mode with no load or b) 10% point of output current for current mode with short circuit). OFF control (default): 3.5V to 24V d-c at pin 50 referenced to pin 48; input current is 1mA ±0.3mA. Turns OFF within 100S max (between 90% point of controlling signal and a) 90% point of output voltage for voltage mode with no load or b) 90% point of output current for current mode with short circuit). If the BOP has a BIT card installed and active, the ON-OFF_CTRL and /ON-OFF_FLAG (pin 46) are disabled to allow the BIT card to control output on-off and monitor output on-off status.

KEPCO® THE POWER SUPPLIER™

INSTRUCTION MANUAL CORRECTION

KEPCO MODELS:BOP 100W, BOP 200W, BOP 400W

BOP/081617

KEPCO, INC. 131-38 SANFORD AVENUE FLUSHING, NY. 11355 U.S.A. TEL (718) 461-7000 FAX (718) 767-1102email: hq@kepcopower.com World Wide Web: http://www.kepcopower.com

2

LOAD REACTANCE, PARAGRAPH 1-10D, add the following:

INDUCTIVE LOADSThere are two means of eliminating oscillation in the current loop operating with moderate inductive loads and moderate voltage and current:

1. Add capacitance in parallel with the output (inductive load). The value of capacitor can be from 0.1 uF to 1.0 uF depending on the value of the load inductance.

2. Add a series-connected resistor capacitor network in parallel with the output (inductive load). The value of resistor should be in the range of 100 to 500 Ohms and the value of capacitor should be 0.1 uF to 0.5 uF, depending on the load inductance value.

Both options are recommended when the BOP is used with very low frequency output into inductive loads.

NOTE:BOP 200W and 400W units may be converted to ML units in order to eliminate oscilla-tion when dealing with a large range of inductive load values. This upgrade must be accomplished at the Kepco factory in Flushing New York and includes component changes and re-calibration of the unit. Please contact Kepco Sales for price and delivery schedule regarding this upgrade.

When driving heavy inductive loads with high currents, it is possible for the BOP and the load to be damaged by an A-C input power loss which prevents the load's stored energy from being dissipated inside the BOP. To avoid possible damage observe the following:• Use UPS to supply the BOP.• Set BOP output current and/or voltage to zero and turn off the BOP after the output current

actually reaches a zero value.• Use properly rated (voltage and current) bipolar transorbs or a properly rated bipolar crow-

bar element connected directly at the output of the BOP. An alternative is an A-C Normally Closed Contactor connected directly at the output of the BOP. These options may also be combined.

CAPACITIVE LOADSWhen driving a capacitive load in voltage mode, the system can become unstable. Install an external ceramic capacitor rated for 50V across pins 12 and 14 of the rear programming con-nector for stable operation. The value of the capacitor is correlated to the load’s capacitance. A value in the range of 0.0047mF to 0.47mF is recommended.

MISCELLANEOUS FEATURES, ADD PARAGRAPH 1-10N

N) REMOTE ON/OFF: A new remote on-off feature is now included in most BOP models as indicated by the front panel (see FIG 2-2A . As shown in FIG 2-2A, if the front panel REMOTE indicator is labelled REMOTE (W/ DIG ON)/OUT ON (W/DIG OFF then the feature is included. This indicator is a dual-function indicator. When digital programming is ON (optional BIT card in use), the indicator is on to show remote mode. When digital programming is OFF (not installed or not in use), the indicator only goes on when the OUTPUT is ON.

3

Isolated remote on-off control of the output and associated flag signal is configured at the PC 15 programming connector. • pin 21 (previously unused) is used for logic selection of isolated on-off.• pin 48 (previously shorted to pin 47) is now the return for isolated on-off control and flag (pin

47 unchanged).• pin 50 (previously shorted to pin 49) now used as isolated on off control (pin 49 unchanged).

Older models (see FIG 2-2) do not have the remote on/off capability and the REMOTE indicator is only on if an optional BIT card is in use. Contact Kepco regarding a KIT to retrofit an older model BOP to include the Remote on/off feature.

FIGURE 2-2A. BOP FRONT TERMINATIONS AND CONTROLS (NEWER MODELS)

BOP FULL RACK

BOP 3/4 RACK

4

PAR. 3-3 SAFETY PRECAUTIONS add the following precaution:

(5) The BOP must always have sensing configured between OUT and OUTS and between COM and COMS. For voltage mode choose either local or remote sensing as desired (front or rear). For current mode use local sensing (front or rear).

AFTER PAR. 3-3 B) LOAD CONNECTION (I) and PAR. 3-3 C) LOAD CONNECTION (II) add the following:

Load connections to the BOP power supply are achieved via the OUTPUT and COMMON ter-minals located on either the front or the rear panel, but not both. Sense connections must be made from the same location (front or rear panel) as the output and common connections.

AFTER PAR. 3-3 D) A-C GROUND add the following:

The GROUND terminal is connected to CHASSIS of the unit and to the local EARTH-GROUND potential through the A-C power line cord. It can be used a) as a monitoring reference point, b) as a grounding point for the output of the unit, and c) for doubling the a-c power cord EARTH-GROUND connection if necessary by providing a separate connection to the local EARTH-GROUND point.

CAUTION: NEVER CONNECT THE BOP OUTPUT TERMINAL (OR THE LOAD TERMINAL TIED TOTHE OUTPUT TERMINAL) TO EARTH-GROUND. OTHERWISE, IF THE CONTROLLINGDEVICE IS GROUNDED, THE BOP CAN BE DAMAGED BY THE OUTPUT LIMIT CUR-RENT FLOWING INSIDE THE BOP ALONG THE PROGRAMMING SIGNAL RETURNPATH.

CAUTION: DO NOT CONNECT BOTH THE LOAD AND THE PROGRAMMING DEVICE RETURN(COMMON) TO EARTH-GROUND POTENTIAL AND DO NOT USE THE PROGRAMMINGRETURN TERMINAL AS A TAP POINT FOR THE LOAD RETURN. OTHERWISE, IF THECOMMON POWER CONNECTION BETWEEN THE BOP AND THE LOAD IS LOST, THEBOP CAN BE DAMAGED BY OUTPUT CURRENT FLOWING INSIDE THE BOP ALONGTHE PROGRAMMING SIGNAL RETURN PATH.

CAUTION: DO NOT USE THE PROGRAMMING RETURN TERMINAL AS A TAP POINT FOR THELOAD RETURN BECAUSE THE BOP CAN BE DAMAGED BY OUTPUT CURRENTFLOWING INSIDE THE BOP ALONG THE PROGRAMMING SIGNAL RETURN PATH.

AFTER PAR. 3-3 E) D-C (SIGNAL) GROUND add the following:

The GROUNDING NETWORK terminal is tied to GROUND (CHASSIS) terminal through a series capacitor-resistor network. Connecting the GROUNDING NETWORK terminal to the COMMON terminal reduces common noise current flowing through the load and, if a BIT card is installed, it ensures that the dynamic swing of the output does not affect the digital section.

5

AFTER PAR. 3-3 J) EXTERNAL LEADS add the following:

K) EXTERNAL VOLTAGE MONITOR. Use signal EO Monitor Output at pin 20 of the PC12 pro-gramming connector (see Figure 4-5) for external voltage monitoring. Caution should be exer-cised in handling this signal: use a series 5K resistor in combination with a high impedance monitoring device, or an external high impedance buffer between the BOP and the monitoring device. This signal is buffered by OPAMP IC23 (see Figure 6-4) which functions as a repeater for the signal coming from the RN3 matched pair divider connected at the output. There is no overvoltage protection. This stage is protected against short-circuit by the intrinsic protection of the OPAMP generating this signal. This signal is used by the BIT card if it is installed.

L) EXTERNAL CURRENT MONITOR. Use signal IO Sensing Output at pin 10 of the PC12 pro-gramming connector (see Figure 4-5) for external current monitoring. This signal is not buff-ered. Use a series 5K resistor in combination with a high impedance monitoring device, or an external high impedance buffer between the BOP and the monitoring device. CAUTION: An accidental short-circuit at this terminal while the unit is in Current mode or Current limit mode will damage the BOP power stage. There is no overvoltage protection. This stage is protected against short-circuit by the intrinsic protection of the OP AMP generating this signal. This signal is used by the BIT card if it is installed.

DIGITAL CONTROL OF BOP POWER SUPPLIES, PARAGRAPH 3-46 add the following:

The SN and SNR Programmers and the BIT 488 cards described in this manual are older meth-ods of controlling BOP power supplies via digital means. Although these products still function as described, one recommended method of digital control is now the use of Kepco’s BIT 4886 16-bit plug-in card with resolution of 1/216. This plug-in card provides talk-listen support for the IEEE 488.2 bus using SCPI commands. The BIT 4886 card allows a BOP to communicate as a stand-alone instrument, directly on the GPIB. The BIT 4886 card also allows the BOP to be pro-grammed over the RS232C bus using either SCPI or CIIL commands via either an RS232-C terminal, or from a PC using a terminal emulation program with a baud rate of 9600, no parity, eight data bits and one stop bit. The downloadable BIT 4886 driver supports digital calibration (no manual pots) and multiple control and read-back ranges.

Another recommended method of digital control is the BIT 802E card, which makes it possible to control the BOP output by means of digital input signals via a LAN (Local Area Network) using SCPI commands. The BIT 802E card acts as an interface between the digital data bus and the BOP, accepting the digital input data and converting it to an analog signal, which in turn, controls the BOP output. The BIT 802E is fully compliant with the SCPI programming language. The BIT 802E is a 16-bit interface card which allows either plus or minus voltage or current out-put at 15 bits of resolution

For more information refer to:www.kepcopower.com/bit.htm.

6

INTERNAL ADJUSTMENTS, PARAGRAPH 3-87, add the following:

Newer models of Series BOP include two additional internal adjustments, A1R133 and A1R136. If your unit has these adjustment pots (see Figure 2-1A), proceed to Paragraph E (below).

FIGURE 2-1A. INTERNAL ADJUSTMENTS, LOCATION OF A1R133 AND A1R136.

E) ADJUSTMENT OF IO-OFF ZERO (A1R133) AND EO-OFF ZERO (A1R136)

Refer to Table 3-1 for adjustment tolerances.

1. At rear panel, connect a wire jumper between terminals 21 and 23 of the Rear Program-ming connector to set the output to OFF (disabled).

2. Connect temperature-compensated precision shunt resistor across the BOP OUTPUT andCOMMON terminals. Connect DVM to the shunt’s sensing terminals for output currentmeasurements.

3. Set MODE switch to CURRENT and CURRENT CONTROL switch to OFF, then turn theBOP on.

4. Adjust IO-OFF ZERO (A1R133) potentiometer (see Figure 2-1A) as specified in for 0A±(0.01% of IOnom) as read on the DVM connected to the shunt (see Table 3-1 for adjust-ment tolerance).

5. Turn off the BOP and remove the shunt resistor from the output. Connect the DVM to theoutput sensing terminal of the BOP (OUT S and COM S).

6. Set MODE switch to VOLTAGE and VOLTAGE CONTROL switch to OFF, then turn theBOP on.

7. Adjust EO-OFF ZERO (A1R136) for 0V ±(0.01% of EOnom) as read on DVM (see Table 3-1 for adjustment tolerance).

7

PERIODIC MAINTENANCE, PARAGRAPH 5-6, add the following:

To clean the unit, proceed as follows:1. Disconnect the unit from mains power.2. Using a damp, lint-free cloth, wipe the exterior of the unit to remove accumulated dirt.3. Reconnect AC power to the unit.

MASTER/SLAVE PARALLEL CONNECTIONS, PARAGRAPH 3-44, add the following:

For two or more parallel units, refer to Figure 3-27A, below. This configuration is more stable and accurate than the simple configuration shown in Figure 3-27; it eliminates the parasitic volt-age drop on the COM connection of the slaves.

TABLE 3-1 ADJUSTMENT TOLERANCES FOR A1R133 AND A1R136

MODEL A1R33 Adjustment Tolerance

A1R36 Adjustment Tolerance

BOP 20-5 ±0.5mA ±2mV

BOP 50-2 ±0.2mA ±5mV

BOP 100-1 ±0.1mA ±10mV

BOP 20-10 ±1.0mA ±2mV

BOP 36-6 ±0.6mA ±3.6mV

BOP 50-4 ±0.4mA ±5mV

BOP 72-3 ±0.3mA ±7.2mV

BOP 100-2 ±0.2mA ±10mV

BOP 200-1 ±0.1mA ±20mV

BOP 20-20 ±2.0mA ±2mV

BOP 36-12 ±1.2mA ±3.6mV

BOP 50-8 ±0.8mA ±5mV

BOP 72-6 ±0.6mA ±7.2mV

BOP 100-4 ±0.4mA ±10mV

8

FIGURE 3-27A. ALTERNATIVE MASTER/SLAVE PARALLEL CONNECTION (FOR MORE PRECISE AND STABLE CONTROL) OF TWO OR MORE BOP POWER SUPPLIES

Io ZERO

3043677 SLAVE 2

BOP CURRENTCONTROL CHANNEL

COMMON S

ON

OFF

ON

OFF

PART OFPC 12

43

22

+

C

10V

+

28

10V

44

MASTER

10

22

C

+

10V

28

+ 10V

Eo ZERO

VOLTAGEPROGRAMMING

INPUTIo SENSING

AMP

BOP VOLTAGECONTROL CHANNEL

Io COMPAMP

NOTES (SLAVE 2):1. MODE Switch position to: CURRENT.2. CURRENT CONTROL Switch to: OFF.3. R1 (A and B) and R2 (A and B) are matched pairs, 0.01% tolerance, metal film, 0.25W.4. Remove PC 12 jumpers between pins 4 and 13 and between pins 15 to 27.

13

15CURRENTCONTROL

10K

19

ZERO

PREAMP"B"

4

10K

C

GATE

DRIVER

2

R

POWERSTAGE

S

OUT

COM

S

COMMON

S

Eo COMPAMP

10K

VOLTAGECONTROL

10K

C

17

ZERO

PREAMP"A"

11

7

9

10K

NOTES (MASTER):1. For Voltage Mode (shown) set MODE Switch to VOLTAGE and VOLTAGE CONTROL Switch to ON.2. For Current mode, set MODE Switch to CURRENT and CURRENT CONTROL Switch to ON. 3. If external control is needed, set the CONTROL switch to OFF and use either the corresponding VOLTAGE or CURRENT PROGRAMMING INPUT or the appropriate PC 12 terminals.

GATE

DRIVER

5

R

POWERSTAGE

S COM

OUT

S

TWIST

LOAD

TWIST

REMOVELINKS

COMMON

POWERSTAGE

Io ZERO

NOTES (SLAVE 1):1. MODE Switch position to: CURRENT2. CURRENT CONTROL Switch to: OFF3. R1 (A and B) and R2 (A and B) are matched pairs, 0.01% tolerance, metal film, 0.25W.4. Remove PC 12 jumpers between pins 4 and 13 and between pins 15 to 27.

15

13

28

SLAVE 1

+

C

+

22

10V

10V

CURRENTCONTROL

PART OFPC 12

OFF

ON

43

44

10K

4

C

PREAMP"B"

BOP CURRENTCONTROL CHANNEL

ZERO

2

10K 19

Io COMPAMP

COMSR

S

OUT

STWIST

DRIVERGATE

+

-

-

+

-+

TWIST

TWIST

-

+

-

+

-

+-

+

1. SYSTEM IS SET IN VOLTAGE MODE, LOCAL CONTROL, REMOTE SENSING.2. FOR MASTER AND SLAVE(S) PIN C OF PC 12 CONNECTOR IS THE "C" POINT (COMMON), AND IS AVAILABLE AT PINS 23, 25, 27, 29, 31 AND 33 OF THE PC 12 CONNECTOR.

GENERAL NOTES:

PARTOF

PC 12

PART OFPC 12

PART OFPC 12

PART OFPC 12

NOTE 3

(EXT.) R2B

20K

(EXT.) R1B

20K

(EXT.) R2A

20K

(EXT.) R1A

20K

(EXT.) R2A

20K

(EXT.) R2B

20K

(EXT.) R1B

20K

(EXT.) R1A

20K

NOTE 3

NOTE 3

NOTE 3

C

C

020317 31

Figure 3-35. Simplified Schematic Diagram, BOP Series

I

I

I

I

I

I

I

I

I

I

I

I

I

I

-I

I

I

I

3-37/(3-38 Blank)

-36/(-37

020317 31

Figure 3-36. PC 15/PC 12 Rear Programming Connector Interconnections

HOUSING

CONNECTORP/N 195-0121

MOUNTING SCREWS (2)4-40 x 1/2, PHILLIP

KEY BETWEENPINS 34 AND 36

FASTENINGSCREWS (2)

VIEW “B”SEE

3044081

CONNECTORP/N 195-0121

LOCKWASHERS (2)NO. 4

FLAT WASHERS (2)NO. 4

SEE VIEW “A”

CONNECTORP/N 195-0039

MOUNTING SCREWS (2)4-40 x 1/2, PHILLIP

HOUSING

KEY BETWEENPINS 34 AND 36

FASTENINGSCREWS (2)

VIEW “A”P/N 195-0039REAR VIEW

3044081

CONNECTORP/N 195-0039

FLAT WASHERS (2)NO. 4

LOCKWASHERS (2)NO. 4

VIEW “B”

PIN 1

PIN 49

PIN 50

PIN 2

INSTALLED(TYPICAL)

P/N 195-0121PIN AND TEST POINT LOCATIONS

TEST POINT

1

3

5

7

9

11

13

15

17

19

21

23

31

27

25

29

2

4

6

8

16

12

10

14

22

28

30

32

18

26

24

20

37

33

35

49

34

36

39

47

4142

38

40

48

50

46

TP4

1 2 TP5

1 2

TP10

12

J1

123456789

1011121314151617181920212223242526272829303132333435363738394041424344454647484950

TP1

1 2

TP2

1 2 TP3

1 2

TP11

12TP6

12

TP8

12

TP9

12

TP7

12

ISOLATEDCIRCUITS

PC12CONNECTOR

3021008

NOTES:

1. Connectors 195-0039 and 195-0121 both perform the same function. Connections shown are for PC 15, local control.

2. For 195-0039, wires are added directly to the terminals for local control. User-added wires or components are connected directly to the terminals.

3. For P/N 195-0121 connections are made via the PWB traces and test points installed at the factory. The following table lists the pins con-nected when the test points are installed. For complete PWB connections, refer to the sche-matic diagram at the left.

4. For P/N 195-0121 if necessary to isolate any pins connected by a test point, cut the test point. CAUTION: Improper soldering tech-nique may damage the PWB beyond repair. Holes are provided at the test points for user-added wires or components. In addition, three holes per pin are provided on the PWB for user-added wires or components.

5. PC 12 (unwired) is supplied either without wires or without test points, depending on the connector used.

TEST POINTPINS CONNECTED WHEN TEST POINT

INSTALLED

TP1 PIN 1 PIN 8

TP2 PIN 1 PIN 34

TP3 PIN 2 PIN 19

TP4 PIN 3 PIN 6

TP5 PIN 3 PIN 32

TP6 PIN 4 PIN 13

TP7 PIN 5 PIN 17

TP8 PIN 7 PIN 9

TP9 PIN 11 PIN 25

TP10 PIN 15 PIN 27

TP11 PIN 26 PIN 36

3-39/(3-40 Blank)

-38/(-39