KEPCO 1KW-EL User manual

110918 228-1699 REV 8 1
KEPCO, INC.  131-38 SANFORD AVENUE  FLUSHING, NY. 11355 U.S.A. TEL [phone]FAX [phone]
http://www.kepcopower.com email: [e-mail]
QUICK START GUIDE
KEPCO An ISO 9001 Company.
BOP
1KW-EL
1KW-GL
BOP 1KW-EL, BOP 1KW-GL
POWER SUPPLY
This guide gives a brief introduction to the BOP 1KW-
EL and -GL Power supply, shows simple load connec-
tions, and allows you to verify the power supply is
working. The guide also shows you how to perform the
most commonly used functions.
Models with EL and GL suffixes are identical except
that the EL units have a factory-installed LAN interface,
and the GL units have a GPIB interface that replaces
the LAN interface. Unless otherwise noted this guide
applies to both models.
ACCESSING MANUALS. First determine your
Firmware Version (see below), then download the BOP
1KW-EL/GL Operator’s Manual from
www.kepcopower.com/support/opmanls.htm#bop-gl
Refer to the BOP 1KW-EL/GL Operator’s Manual for
full specifications, installation considerations and oper-
ating instructions. The BOP 1KW-EL/GL Operator’s
Manual also includes a full description of the digital
interfaces and the SCPI command language.
FIRMWARE VERSION. With no load connected
use either the GPIB port or RS 232 port (see page 6) or
LAN port (see page 8) to accept remote commands.
If necessary, refer to “Reset Power-up” on page 9 and
Figure 6 to configure the GPIB address (default is 6) or
configure the RS 232 baud rate (default is 9600).
Apply power to the unit and send *IDN? query. The unit
responds with a character string containing the follow-
ing fields: <Manufacturer>,<Model Voltage- Current
Calibration Date>,<Serial Number>, <Firmware Ver-
sion> e.g., KEPCO, BOP1KW 20-50 09/30/
2001,123456,4.01.
ACCESSING DRIVERS. Drivers are accessed
from www.kepcopower.com/drivers/drivers-dl3.htm.
CONTENTS
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Equipment Supplied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Preliminary Operational Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Input Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Load Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Local Sensing (Factory Default). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Remote Sensing Select. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Analog I/O Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Trigger Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
GPIB Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
RS 232 Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
LAN Connections (EL Models Only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Finding Kepco Power Supplies on the LAN (EL Models Only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Power-up Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Turning The Power Supply On. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Reset Power-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
LAN Reset (EL models only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Normal Power-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Power Supply Basics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Voltage and Current Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Setting Voltage or Current Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Voltage/Current Protect Limits (Limit Channel Software Limits). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Software Limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Maximum/Minimum Protection Limits (Software-controlled). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Determining How the Unit Responds when Output is OFF (Load Type). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Configure Load Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Enabling/disabling Output Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Additional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2228-1699 REV 8 110918
KEPCO, INC.  131-38 SANFORD AVENUE  FLUSHING, NY. 11355 U.S.A. TEL [phone]FAX [phone]
http://www.kepcopower.com email: [e-mail]
I — DESCRIPTION
The BOP 1KW-EL and 1K-GL Series hereafter
referred to as BOP-EL/GL, are true 4-quadrant pro-
grammable voltage and current power supplies,
meaning they are capable of both sourcing and sink-
ing power (see Figure 1). Models with EL and GL
suffixes are identical except that the GL units have a
factory-installed GPIB interface, and the EL units
have a LAN interface that replaces the GPIB inter-
face.
The BOP-EL/GL models have been optimized for
exceptionally low current ripple and noise and
improved stability (drift and temperature), making
them ideal for driving inductive loads such as large
magnets or motors. These bipolar power supplies
pass smoothly through zero without switching to pro-
vide true ± voltage and ± current. These BOP-EL/GL
power supplies use switch mode technology for low
dissipation. A bi-directional, isolating, a-c input
power factor correcting (PFC) circuit recuperates
energy sinked from an active load and sends it back
into the line to maintain low dissipation.
These BOP power supplies can be controlled
remotely by an analog ±10V input for the main chan-
nel (voltage or current), and by a +1 to +10V input
for the limit channels. They can also be controlled
through one of the standard digital interfaces (RS
232, LAN on EL models or GPIB on GL models) to
set voltage and current and the four protection limits
(+voltage, –voltage, +current and –current.) Output
voltage and current can be remotely monitored via
the analog monitor signals present at the rear panel
Analog I/O Port connector, or by using SCPI com-
mands via either the one of the digital interfaces..
.
II — UNPACKING
This instrument has been thoroughly inspected and
tested prior to packing and is ready for operation.
After careful unpacking, inspect for shipping damage
before attempting to operate. Perform the “Prelimi-
nary Operational Check” on page 5. If any indication
of damage is found, file an immediate claim with the
responsible transport service.
III — EQUIPMENT SUPPLIED
See Table 2.
TABLE 1. BOP-EL/GL 1000 WATT MODEL PARAMETERS
Model
(See Note 1.)
d-c Output Range Closed Loop Gain
EO Max IO Max Voltage
Channel Current Channel
1000 WATT MODELS
BOP 10-100EL/GL ±10V d-c ±100A d-c 1.0 10.0
BOP 20-50EL/GL ±20V d-c ±50A d-c 2.0 5.0
BOP 36-28EL/GL ±36V d-c ±28A d-c 3.6 2.8
BOP 50-20EL/GL ±50V d-c ±20A d-c 5.0 2.0
NOTES:1. EL suffix models include LAN interface, GL suffix models include GPIB interface.
2. When connecting active loads, the steady-state voltage of the active load must not exceed the maximum
voltage rating of the BOP. Otherwise the overvoltage protection will shut down the power supply.
TABLE 2. EQUIPMENT SUPPLIED
ITEM FUNCTION PART NUMBER
Source Power Entry mating connector Mates with source power entry connector 142-0381 (Kepco) (IEC 320)
PAR/SER CONTROL - IN
mating connector Mates with PAR/SER CONTROL - IN port to allow access to pins required for calibration 142-0488 (Kepco)
Mating Connector, Trigger Mates with Trigger port. 142-0527 (Kepco)
SP2501 (CUI Stack)
Mating Connector, Analog I/O Port
(15-pin DSUB Connector) Mates with connector for Analog I/O port A2A5J6 Dsub 15 pin hood
Dsub 15 pin male
108-0374
(Tyco-Amp 207470-1)
142-0449
(Amphenol 17S-DA15P)

110918 228-1699 REV 8 3
KEPCO, INC.  131-38 SANFORD AVENUE  FLUSHING, NY. 11355 U.S.A. TEL [phone]FAX [phone]
http://www.kepcopower.com email: [e-mail]
FIGURE 1. BOP-EL/GL OUTPUT CHARACTERISTICS

4228-1699 REV 8 110918
KEPCO, INC.  131-38 SANFORD AVENUE  FLUSHING, NY. 11355 U.S.A. TEL [phone]FAX [phone]
http://www.kepcopower.com email: [e-mail]
IV — ACCESSORIES See Table 3.
V — SAFETY See Table 4
TABLE 3. ACCESSORIES
ITEM FUNCTION PART NUMBER
Mating Connector, Trigger Mates with Trigger port. 142-0527 (Kepco)
SP2501 (CUI Stack)
IEEE 1118 (BITBUS)
Mating connector Allows connection to IEEE 1118 (BITBUS) port. 142-0485 (Kepco) KMDLA-5P (Kycon Inc.)
IEEE 488 Cable, (1 meter long) Connects BOP-GL power supply to GPIB bus. SNC 488-1
IEEE 488 Cable, (2 meter long) Connects BOP-GL power supply to GPIB bus. SNC 488-2
IEEE 488 Cable, (4 meter
longs) Connects BOP-GL power supply to GPIB bus. SNC 488-4
Line Cord (250V, 20A) Provides connection to a-c mains via Nema 6-20P connector. 118-1087
Line Cord (250V, 20A) Provides connection to a-c mains via Nema L6-20P locking type con-
nector. 118-1088
RS 232 Cable Kit Contains RJ11 to RJ45 Patch cord, RJ 45 Patch cord, two RS 232
adapters, one with male pins to connect to DTE equipment and one
with female pins to connect to a PC (personal computer), two RS 232
Loop Back test Connectors (one 6-pin and one 8-pin) to test RS 232
communication and aid in isolating RS 232 communication problems.
KIT 219-0436
RS 232 Adapter (Male pins) Allows RS 232 port to be connected to DTE equipment. (Supplied in
KIT 219-0436.) 142-0487 (L-COM RA098M)
RS 232 Adapter (Female pins) Allows RS 232 port to be connected to a PC (personal computer). (Sup-
plied in KIT 219-0436.) 142-0506 (L-COM RA098F)
15-pin DSUB Connector Mating connector for Analog input connector A2A5J6 Dsub 15 pin hood
Dsub 15 pin male
108-0374
(Tyco-Amp 207470-1)
142-0449
(Amphenol 17S-DA15P)
IDC 6-pin connector Mating connector for RS-232 PORT, connector A1J5 and PROTEC-
TION EXT. PORT, connector A2A5J7 142-0536 (Amphenol 5-555176-3)
IDC 8-pin plug Mating connector for PAR/SER PROTECT PORT (IN and OUT) con-
nectors. 142-0535 (Amphenol 5-555176-3)
Slides Allows easy withdrawal of unit from rack (Model CS 04 includes slides,
brackets, all mounting hardware and installation instructions.) CS 04
Heat Sink Provides adequate cooling for calibration sense resistors. 136-0451
Output Terminal Cover Protects against inadvertent contact with output and barrier strip termi-
nals 129-0423
TABLE 4. SAFETY SYMBOLS
SYMBOL MEANING
CAUTION: RISK OF ELECTRIC SHOCK.
CAUTION: REFER TO REFERENCED PROCEDURE.
WARNING INDICATES THE POSSIBILITY OF BODILY INJURY OR DEATH.
CAUTION INDICATES THE POSSIBILITY OF EQUIPMENT DAMAGE.
!

110918 228-1699 REV 8 5
KEPCO, INC.  131-38 SANFORD AVENUE  FLUSHING, NY. 11355 U.S.A. TEL [phone]FAX [phone]
http://www.kepcopower.com email: [e-mail]
VI — PRELIMINARY OPERATIONAL CHECK
A simple operational check after unpacking and
before equipment installation is advisable to ascer-
tain whether the power supply has suffered damage
resulting from shipping.
1. With POWER switch set to off position, connect
the power supply to source power (see “Input
Connections” below).
2. Verify that the power-up switches at the top cover
are set to the factory default positions shown in
Figure 6. This establishes GPIB address 6, stand-
alone operation, Voltage mode, Analog Input
enabled and internal ±current limits enabled and
set to maximum.
NOTE: The unit is shipped with load type set to
Active (for inductive loads). To change the
load type refer to the “Reset Power-up” on
page 9. The logic for Remote on/off input
at pin 2 of the Trigger port is set to high (1)
or open circuit for output on, low (0) or
short circuit for output off.
3. Connect a twisted wire pair (either #24 or #22
AWG) to the mating connector for the Analog I/O
port pins 11 and 10. Connect +10V d-c ±0.1mV to
pin 11, referenced to pin 10, then install the mat-
ing connector on the Analog I/O port at the rear
panel.
CAUTION:
DO NOT repeatedly toggle the
POWER circuit breaker/switch as
this may damage the unit.
4. Connect the power supply to source power. With
no load connected, set POWER switch to the ON
position.
5. Each time the unit is turned on an internal self-
test is performed. If the unit passes, it initializes
with the power-up settings established in step 2
and the front panel POWER/FAULT/LIMIT light is
green (power good), the DIGITAL CONTROL light
is not lit (analog input enabled) and the VOLT-
AGE/CURRENT light is green (voltage mode),
MASTER/SLAVE light is green (standalone or
master configuration) and the OUTPUT ON light
is lit (output enabled). If the front panel POWER/
FAULT/LIMIT light is red, the unit has failed self-
test; contact Kepco for further instructions. If the
unit beeps, or the MASTER/SLAVE or VOLTAGE/
CURRENT light blinks, refer to the BOP-EL/GL
Operator Manual for troubleshooting.
6. Connect a digital voltmeter (DVM) with resolution
and accuracy of 0.001% or better to the OUT S
and COM S terminals at the rear panel terminal
block.
7. Verify DVM voltage reading matches the nominal
voltage of the unit within 0.01% of rated maximum
voltage.
VII — INSTALLATION
Install units either on a bench or in a 19 inch-wide
rack. For rack mounting: first remove four feet; rack
must provide support at the rear. Optional slides
may be used. Leave the front and rear panels clear
of obstructions to ensure adequate cooling.
INPUT CONNECTIONS. Source power is con-
nected to the power supply via three-wire input
power using the source power mating connector
supplied (see Table 3). This power supply operates
from single phase a-c mains power (or between two
phases of 3-phase a-c mains power), 230V, 50/60Hz
nominal (range: 176 - 264V, 47-63Hz) without any
need for range selection. The user must provide a
properly sized and rated mains lead (line cord) and
service with a current rating compatible with the
required input current. Line cords available as
accessories are listed in Table 3. Plug the source
power connector into the source power inlet connec-
tor at the rear panel.
LOAD CONNECTIONS.
CAUTION:
Before connecting a load, set the
power up switches (see “Power-up
Settings” on page 8 and “Turning
The Power Supply On.” on page 9)
to be compatible with your load.
Power connections require wires that are properly
rated for the nominal output current of the unit. Con-
nect the load to the OUTPUT and COMMON power
terminals on the rear panel (see Figure 3). OUT S
and COM S terminal of the Monitor and Sensing Ter-
minal block are for connection of remote sensing
leads (after removing the factory-installed local
!
!

6228-1699 REV 8 110918
KEPCO, INC.  131-38 SANFORD AVENUE  FLUSHING, NY. 11355 U.S.A. TEL [phone]FAX [phone]
http://www.kepcopower.com email: [e-mail]
sensing links). NOTE: Output Sense lines must be
connected for proper operation, either locally, or
at the load (remote). Also use OUT S and COM S
to monitor voltage at the load using external equip-
ment such as a DVM, oscilloscope, etc. Use OUT
MON and COM MON to monitor output voltage
locally at the BOP-EL/GL output.
LOCAL SENSING (FACTORY DEFAULT).
Unit is shipped with local sensing links installed:
OUT S connected to OUT MON and COM MON
connected to COM S (see Figure 4A).
REMOTE SENSING SELECT. First remove the
factory-installed local sensing links between OUT S
and OUT MON and between COM MON and COM
S. Then connect the OUT S and COM S lines at the
load (see Figure 4B) using #22 AWG wire, twisted
pair.
ANALOG I/O CONNECTIONS. The Analog I/O
Port connector, located on the rear panel of the
BOP-EL/GL 1KW power supply (see Figure 3), pro-
vides access to analog programming inputs which
can control the mode of operation (voltage or cur-
rent), output voltage or current, and establish posi-
tive and negative voltage and current limits. Output
analogs corresponding to output current and voltage
are also provided. Refer to Operator’s manual for
details.
TRIGGER CONNECTIONS. The Trigger Port
(see Figure 3) provides for an external trigger input
for use with SCPI *TRG and TRIG commands. Refer
to Operator’s manual for details.
GPIB CONNECTIONS. Your computer must
have a GPIB interface card installed. Connect the
power supply to the computer’s GPIB interface card.
Use a standard GPIB interface cable at the GPIB
port on the rear panel (see Figure 3). The default
GPIB address is 6; refer to the Operator’s Manual to
change it.
RS 232 CONNECTIONS. Connect the BOP-EL/
GL to a modem using a Null Modem patch cable at
the RS 232 port located on the rear panel (See Fig-
ure 3). A Null Modem cable is not required for older
MAC computers with D-sub serial port in which the
RXD and TXD line transposition is accomplished via
external hardware. The baud rate (9600 or 19200) is
established by performing a “Reset Power-up” (see
page 9).
FIGURE 2. BOP-EL/GL 1KW SERIES, FRONT PANEL CONTROLS AND INDICATORS

110918 228-1699 REV 8 7
KEPCO, INC.  131-38 SANFORD AVENUE  FLUSHING, NY. 11355 U.S.A. TEL [phone]FAX [phone]
http://www.kepcopower.com email: [e-mail]
FIGURE 3. BOP-EL/GL 1KW SERIES, REAR PANEL VIEW, LINKS INSTALLED FOR LOCAL SENSING
FIGURE 4. LOAD CONNECTION
A. LOCAL SENSING B. REMOTE SENSING
GND
NET
OUT
MON
N / C OUT
SCOM S
COM
MON
GND

8228-1699 REV 8 110918
KEPCO, INC.  131-38 SANFORD AVENUE  FLUSHING, NY. 11355 U.S.A. TEL [phone]FAX [phone]
http://www.kepcopower.com email: [e-mail]
LAN CONNECTIONS (EL MODELS ONLY).
Connect the BOP 1KW-EL to a Microsoft Windows-
based computer via the LAN connector (see Figure 3).
Use a standard ethernet cable whether using a router
or hub, or connecting the BOP 1KW directly to a com-
puter. The BOP 1KW-EL is Auto-MDI-X enabled and
does not require a crossover cable for direct connec-
tion. For Unix and Safari connections see full Operator
Manual (refer to “Accessing Manuals.” on page 1).
FINDING KEPCO POWER SUPPLIES ON
THE LAN (EL MODELS ONLY). The PSfind
utility can be downloaded from the Kepco web site
at:
www.kepcopower.com/drivers/drivers-dl3.htm#bop1k
This utility finds all operational Kepco power sup-
plies connected to the LAN and then shows the
MAC and IP addresses of the models found.
To run the utility from your PC download the
psfind.zip file to your computer. Extract psfind.exe
from the zip file to a location of your choice, then
double-click psfind.exe to run the application. A
separate window opens as shown in Figure 5.
Once the search is completed, all found units are
displayed in the Select a Unit window (the MAC
address appears in parentheses). If you do not see
your device in the Select a Unit window or if the icon
to the left of the selected instrument is red (not
green), make sure it is turned on and connected to
the network, then click the Search Again button.
FIGURE 5. PS FIND SCREEN
VIII — OPERATION
The user is urged to download the Operator’s man-
ual (see “Accessing Manuals.” on page 1) for com-
plete operating instructions. Some additional
features covered in the Operator Manual are listed
on page 14. In addition, the Operator’s Manual also
covers the digital interfaces, including the use of the
drivers downloadable from:
www.kepcopower.com/drivers/drivers-dl3.htm#bop1k
POWER-UP SETTINGS Read this before con-
necting a load!
CAUTION:
The unit will power-up as specified
by the power-up switches (see Fig-
ure 6). Use the “Reset Power-up”
on page 9 to change the load type
settings to match your load charac-
teristics. To change any default set-
ting not covered by this guide, refer
to the Operator’s Manual.
Default settings are in BOLD (other
choices are in italics):
• Load type Active (Battery, Resistive)
•Standalone configuration (Master, Slave)
• Analog Control enabled (disabled)
•Voltage mode (Current mode)
•Protection: internal control, ± limit values at
max (1.01 x EOnom or IOnom)
• • (internal control, +limit values at maximum
(1.01 x EOnom or IOnom), –limit values
at minimum (box))
• • (internal control, –limit values at maximum
(1.01 x EOnom or IOnom),
+limit values at minimum (box))
• • (External protection limits)
• RS 232 Baud rate 9600 (19.2K)
•GPIB address 6 (0 to 30)
• Trigger port pin 2 remote on/off logic set for:
logic 1 or open = output enabled,
logic 0 or short = output enabled,
logic 0 or short = output disabled
logic 1 or open = output disabled
FIGURE 6. TOP COVER POWER-UP SWITCHES,
FACTORY DEFAULT SETTINGS
!

110918 228-1699 REV 8 9
KEPCO, INC.  131-38 SANFORD AVENUE  FLUSHING, NY. 11355 U.S.A. TEL [phone]FAX [phone]
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TURNING THE POWER SUPPLY ON.
The status of the unit upon power-up depends on
the configuration of the three power-up switches
(see Figure 6). Each power-up switch has five seg-
ments. For convenience the switch settings are often
given for all segments; e.g., 00110 indicates seg-
ments 5, 4 and 1 are off (0) and segments 2 and 3
are on (1). In other instances a particular segment
(e.g., S3-5) is specified.
Reset Power-up The reset power-up allows the
power-up switches to establish 1) load type, 2)
Remote On/off logic at Trigger port pin 2 and 3) RS
232 baud rate. The reset power-up also resets all
limits to the factory default condition (overrides limit
settings previously saved by MEM:UPD LIM com-
mand). If load type, baud rate and Trigger Port
remote on/off logic do not need to be changed, refer
to “Normal Power-up” on page 9.
1. With power off, refer to Figure 6 and set switches
S1-1 through S1-5 to 1 (GPIB address to 11111)
and set all S3 switches to 0.
2. Set S3 as follows to establish the load type upon
power-up: Resistive load: S3-2 to 1, S3-3 to 0,
Active Load: S3-2 to 0, S3-3 to 1, Battery load:
S3-2 to 1, S3-3 to 1. Setting both S3-2 and S3-3
to 0 is invalid and causes the unit to continuously
beep three times.
3. Set S3-1 to establish the baud rate for RS 232
operation: 1 = 19.2K, 0 = 9600.
4. Set Remote On/Off signal logic at pin 2 of the
External Trigger Port as follows:
5. Do not change S2 settings.
CAUTION:
DO NOT repeatedly toggle the cir-
cuit breaker/switch as this may
damage the unit.
6. Set POWER ON/OFF circuit breaker/switch on
front panel to ON. If actuator does not lock when
released, wait a few seconds before trying again.
The circuit breaker is “trip-free” design; if overload
exists, contacts cannot be held closed by actua-
tor.
7. The unit will begin beeping on and off at equal
intervals. Set POWER ON/OFF circuit breaker/
switch on front panel to OFF and proceed to nor-
mal power-up (see below) to complete power-up
configuration.
LAN Reset (EL models only) .If the LAN inter-
face is set to a specific address, it may not be com-
patible with new network connections if the unit is
moved. To make the unit accessible, press the LAN
Reset switch on the rear panel (see Figure 3) using
a small screwdriver or the end of a paper clip. LAN
reset causes DHCP and AUTOIP to be set to ON,
allowing the network to establish a valid address.
Normal Power-up The normal power-up estab-
lishes the operating mode of the unit, whether con-
trol will be analog or digital, whether the unit is
standalone or part of a multi-unit configuration, and
selects the GPIB address to be used.
1. With power off, set power-up switches S1, S2 and
S3 as follows (see Figure 6):
a. Set S3 to 11111 to establish voltage mode,
analog input on, ±V Protect Max and ±C Pro-
tect Max set to maximum (change S3-1 to 0 for
current mode, change S3-2 to 0 for Analog
Input off). For EL models it is recommended
that S3-2 be set to 0 so the web page can con-
trol the output.
b. Set S2 to 00001 to select standalone opera-
tion.
c. Set S1 with valid GPIB address from 0 to 30.
S1-1 through S1-5 is 20through 24. Default
GPIB address is 00110 = 6.
CAUTION:
DO NOT repeatedly toggle the cir-
cuit breaker/switch as this may
damage the unit.
2. Set POWER ON/OFF circuit breaker/switch on
front panel to ON. If actuator does not lock when
released, wait a few seconds before trying again.
The circuit breaker is “trip-free” design; if overload
exists, contacts cannot be held closed by actua-
tor.
3. Unit performs self-test upon power-up initializa-
tion. If the unit passes self-test, the POWER/
S3-4 S3-5 To Set Output: At Pin 2 Apply:
0 0 ON Low or short
0 1 ON High or open
1 1 OFF High or open
1 0 OFF Low or short
NOTE: For older GL models without LAN indicator, consult com-
plete Operator Manual (see “Accessing Manuals.” on page 1.
!
!

10 228-1699 REV 8 110918
KEPCO, INC.  131-38 SANFORD AVENUE  FLUSHING, NY. 11355 U.S.A. TEL [phone]FAX [phone]
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FAULT/LIMIT light turns green and the unit is
ready for operation; if it fails, the light turns red.
POWER SUPPLY BASICS. When in Voltage
mode, the power supply will (within the configured
and rated limits) provide the programmed output
voltage. Current is determined by the load, and can-
not exceed the Current Protect limits. If the protect
limit is reached, the POWER/FAULT/LIMIT LED light
changes from green (power OK) to orange.
When in Current mode, the power supply will (within
the configured and rated limits) provide the pro-
grammed output current. Voltage is determined by
the load, and cannot exceed the Voltage Protect lim-
its. If the protect limit is reached, the POWER/
FAULT/LIMIT LED light changes from green (power
OK) to orange.
VOLTAGE AND CURRENT PARAMETERS.
Table 5 defines the voltage and current parameters
used in this manual and provides references to the
SCPI commands and queries associated with the
parameter.
SETTING VOLTAGE OR CURRENT MODE.
The BOP-EL/GL uses two separate channels, one to
set output voltage or current and one to set the cor-
responding protection limit. The main channel is
determined by the power-up switches during normal
power-up:
Voltage Mode: S3-5 = 1, S3-1 = 1
Current Mode: S3-5 = 1, S3-1 = 0
The protection channel is determined automatically
by the main channel selected. When Voltage mode
is selected, the current protection channel is in use,
and when Current mode is selected, the Voltage pro-
tection channel is in use.
VOLTAGE/CURRENT PROTECT LIMITS
(LIMIT CHANNEL SOFTWARE LIMITS).
These values are the references for the complemen-
tary channels: voltage in current mode and current in
voltage mode. The range for these values is
between a minimum (box) value (see Figure 1) and
1% above the rated nominal value. If the unit is in
voltage mode, it will enter current protect mode
when the load demands more current and energy
than permitted by the ±current protect settings. Simi-
larly, if the unit is in current mode, it will enter voltage
protect mode if the load demands more voltage and
energy than permitted by the ±voltage protect set-
tings. When the protect settings are exceeded, the
protection channel limits the output current or volt-
age, the POWER/FAULT/LIMIT LED lights orange
(LIMIT), and the power supply continues operation
in the complementary mode of operation.
The BOP can be configured to program the protec-
tion limits as a single value that applies to both pro-
tection channels (using CURR:PROT:LIM or
VOLT:PROT:LIM) or by individual commands:
(CURR:PROT:LIM:POS, CURR:PROT:LIM:NEG,
VOLT:PROT:LIM:POS, VOLT:PROT:LIM:NEG) to
program individual settings for positive and negative
protection limits.
SOFTWARE LIMITS. The software limits for the
main channels (+Voltage Max, –Voltage Min, +Cur-
rent Max and –Current Min) are the maximum (posi-
tive) and minimum (Maximum negative) values
allowable for voltage and current. The default soft-
ware limits are determined by the model: the nomi-
nal (rated) values for voltage and current (e.g., 36V
and 28A for the BOP 36-28GL). These four values
can be adjusted independently. For example, a BOP
36-28GL, capable of delivering ±36V in voltage
mode can be configured to allow voltage to be
adjusted only from –1V to +15V by setting –Voltage
Min to –1 and +Voltage Max to +15. This can be
done by sending VOLT:LIM:POS 15 and
VOLT:LIM:NEG 1 commands via either GPIB or RS
232 ports.
NOTE: If main channel software limits are changed
from the default, the corresponding protection limits
are automatically set to 1% above the new maxi-
mum value. The complementary software limits are
unchanged - they must be changed manually if
needed.
MAXIMUM/MINIMUM PROTECTION LIM-
ITS (SOFTWARE-CONTROLLED). The ± pro-
tection limits are software limits that establish the maxi-
mum and minimum (maximum negative) allowable
levels of output voltage in current mode and current in
voltage mode. The default protection limits are 1%
above EOmax or 1% above IOmax.
CAUTION:
When working with active loads,
always adjust the BOP protection
limits to be above the maximum
values of voltage or current
expected from the load. For exam-
ple, when the BOP is operating in
voltage mode sinking energy from
a constant current type load, set
the current protection limits of the
BOP above the maximum current
expected from the load.
!

110918 228-1699 REV 8 11
KEPCO, INC.  131-38 SANFORD AVENUE  FLUSHING, NY. 11355 U.S.A. TEL [phone]FAX [phone]
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The protect channel limits are +V (voltage) Protect max,
–V Protect min, +C (current) Protect max and –C Pro-
tect min (see Table 5); these prevent the unit from
sourcing or sinking voltage or current that exceeds
these settings. In voltage mode the current protect
channel is clamped to the limit value; in current mode
the voltage protect channel is clamped to the limit value.
Adjustment range is between a minimum (box) value
(see Figure 1) and 1% above the nominal (rated) value.
TABLE 5. VOLTAGE AND CURRENT PARAMETER DEFINITIONS
Term Definition Associated SCPI
command/query
+EOnom
–EOnom The nominal (rated) output voltage of the unit determined by model; e.g. for
a BOP 36-28GL, ±EOnom is 36V. N/A
+IOnom
–IOnom The nominal (rated) output current of the unit determined by model; e.g. for
a BOP 36-28GL, ±IOnom is 28A. N/A
+Voltage
–Voltage Voltage mode only. Positive (+) and negative (–) output voltage values established by remote command.
Range (+): 0 to +Voltage max
Range (–): 0 to –Voltage min
VOLT
+Voltage max
–Voltage min Voltage mode only. Maximum (positive) and minimum (maximum negative) voltage that can be set.
Value (+): 0 to +EOnom
Value (–): 0 to –EOnom
VOLT:LIM[:BOTH]
VOLT:LIM:NEG
VOLT:LIM:POS
+Current Protect
–Current Protect Voltage mode only. Defines maximum (+) current and Minimum (maximum negative) (–) that unit can source or sink.
Range (+): +Current Protect min to +Current Protect max
Range (–): –Current Protect max to –Current Protect min
CURR:PROT
CURR:PROT:NEG
CURR:PROT:POS
+Current Protect Max
–Current Protect Min Voltage mode only. Maximum setting for +Current Protect and Minimum (maximum negative) setting for –Current Protect.
Value (+): +Current Protect min to (1.01 x +Current max)
Value (–): –Current Protect max to (1.01 x –Current min)
CURR:PROT:LIM
CURR:PROT:LIM:NEG
CURR:PROT:LIM:POS
Minimum (box)
+Current Protect Min
–Current Protect Max
Voltage mode only. Minimum (positive) setting for +Current Protect and
maximum (maximum negative) setting for –Current Protect. Values of ±Cur-
rent Protect between +Current Protect Min and –Current Protect Max (near
zero) are not allowed. This zone (also referred to as the minimum (box) is
automatically calculated by the BOP (see Figure 1).
N/A
+Voltage Protect
–Voltage Protect Current mode only. Maximum positive (+) and minimum (maximum negative) (–) voltage that can appear at the output.
Range (+): +Voltage Protect min to +Voltage Protect max
Range (–): –Voltage Protect max to –Voltage Protect min
VOLT:PROT
VOLT:PROT:NEG
VOLT:PROT:POS
+Voltage Protect Max
–Voltage Protect Min Current mode only. Maximum (positive) setting for +Voltage Protect and Minimum (maximum negative) setting for –Voltage Protect.
Value (+): +Voltage Protect min to (1.01 x +Voltage max)
Value (–): –Voltage Protect max to (1.01 x –Voltage min)
VOLT:PROT:LIM
VOLT:PROT:LIM:NEG
VOLT:PROT:LIM:POS
Minimum (box)
+Voltage Protect Min
–Voltage Protect Max
Current mode only. Minimum (positive) setting for +Voltage Protect and
maximum (maximum negative) setting for –Voltage Protect. Values of ±Volt-
age Protect between +Voltage Protect Min and –Voltage Protect Max (near
zero) are not allowed. This zone (also referred to as the minimum (box) is
automatically calculated by the BOP (see Figure 1).
N/A
+Current
–Current Current mode only. Positive and negative output current established by remote command.
Range (+): 0 to +Current max
Range (–): 0 to –Current min
CURR
+Current max
–Current min Current mode only. Maximum (positive) and minimum (maximum negative) current that can be set.
Value (+): 0 to +IOnom
Value (–): 0 to –IOnom
CURR:LIM
CURR:LIM:NEG
CURR:LIM:POS

12 228-1699 REV 8 110918
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DETERMINING HOW THE UNIT RESPONDS
WHEN OUTPUT IS OFF (LOAD TYPE). The
BOP-EL/GL supports three Load Type selections
which determine how the power supply responds
when the output is off: ACTIVE, RESISTIVE and
BATTERY (see Table 6). The Load Type selection
does not affect the settings of the power supply for
ON state; it only affects the main internal reference
level and the protection levels during the OFF state.
Load type is selected by performing a Reset Power-
up or by using the OUTP:MODE command.
WARNING
For inductive loads, and especially
superconducting magnet type
loads, the inherent offset of the
BOP-EL/GL in the OFF state may
generate significant current in the
circuit. A properly rated switch in
parallel with a resistor must be con-
nected between the power supply
and the load. The switch must be
open and voltage and current mea-
surements at the output must read
0V, 0A before removing or installing
connections between BOP and
load.
Active. Active mode (default setting) is necessary
for the power supply to function properly and safely
with inductive loads and constant-current-type active
electronic loads. Active mode can also be used with
resistive loads. Table 6 indicates how the power sup-
ply responds to a command to go from Output ON to
OFF. When the output is disabled, the unit is set to
voltage mode, voltage is set to zero and both current
protect and voltage limit are set to maximum. When
the unit is enabled, the pre-existing settings for volt-
age, current protect and voltage limit are restored.
WARNING
For both inductive loads and con-
stant-current-type active electronic
loads, when the BOP-EL/GL output
is set to OFF, a path is provided for
absorbing either the energy accu-
mulated in the reactance of the load
during the ON state, or energy
delivered by an electronic load.
This prevents damage to the load
and power supply as well as pro-
viding safety for the user. However,
in addition to the built-in safety fea-
tures, constant-current-type active
electronic loads must be adjusted
to zero and voltage and current
measurements at the output must
read 0V, minimum current, before
handling the power supply-to-load
connections.
Resistive. This mode, as the name suggests, is
useful for resistive loads. Table 6 indicates how the
power supply responds to a command to go from
Output ON to OFF.
TABLE 6. POWER SUPPLY BEHAVIOR WHEN OUTPUT IS SET TO OFF
LOAD TYPE
SETTING If unit was in Voltage Mode when output OFF command issued. If unit was in Current Mode when output OFF command issued.
ACTIVE
• Unit remains in voltage mode.
• Voltage set to zero.
• Both ± Current Protect set to maximum.
• Both ± Voltage Limit remain at maximum.
• Unit set to voltage mode.
• Voltage set to zero.
• Both ± Current Protect remain at maximum.
• Both ± Voltage Limit set to maximum.
RESISTIVE
• Unit remains in voltage mode.
• Voltage set to zero.
• Both ± Current Protect set to minimum box values.
• Both ± Voltage Limit remain at maximum.
• Unit remains in current mode.
• Current set to zero.
• Both ± Current Protect set to minimum box values.
• Both ± Voltage Limit set to maximum,
BATTERY
• Unit set to current mode.
• Current set to zero.
• Both ± Voltage Protect remain at maximum.
• Both ± Current Limit set to maximum.
• Unit remains in current mode,
• Current set to zero.
• Both ± Voltage Protect set to maximum.
• Both ± Current Limit remain at maximum.

110918 228-1699 REV 8 13
KEPCO, INC.  131-38 SANFORD AVENUE  FLUSHING, NY. 11355 U.S.A. TEL [phone]FAX [phone]
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WARNING
Accessing the BOP-EL/GL after the
output is disabled in BATTERY
mode is hazardous because (1)
high current arcing is possible and
(2) either the external battery volt-
age, or the voltage (±Voltage Pro-
tection max) on the BOP-EL/GL
output terminals may be danger-
ous. Therefore, for battery and con-
stant-voltage-type active electronic
loads it is recommended that two
properly rated external switches be
installed for safety: one in series
with the battery, and one across the
BOP-EL/GL output. After the unit is
set to OFF, first open the switch in
series with the battery, then close
the switch across the BOP-EL/GL
output to ensure safety before han-
dling BOP-EL/GL connections.
When connecting the battery, the
switch across the output should be
opened after the connections are
complete and then the switch in
series with the battery should be
closed. If the constant-voltage-type
active electronic load is adjusted to
zero before handling the power
supply-to-load connections, only
the switch across the BOP-EL/GL
output is required.
Battery. This mode is necessary for the power sup-
ply to function properly and safely with either battery
or constant-voltage-type active electronic loads. This
mode prevents the battery from discharging during
the OFF state. When the output is disabled (set to
OFF), the BOP-EL/GL will go to current mode, cur-
rent will be set to zero, with voltage protect and cur-
rent limit set to maximum. In this way the battery will
not be discharged while the output is OFF. For con-
stant-voltage-type active electronic loads this mode
stops energy flow during the OFF state. Table 6 indi-
cates how the power supply responds to a command
to go from Output ON to OFF.
CONFIGURE LOAD TYPE. To configure, per-
form “Reset Power-up” on page 9 and change S3 as
desired.
ENABLING/DISABLING OUTPUT POWER.
The behavior of the unit when disabled depends on
the Load Type setting (see Table 6 for details). There
are four ways to disable the output, refer to Operator
Manual for details:
1. Using Remote Shutdown pin 2 (referenced to pin
1) of the Protection Ext. port. This faults the unit,
and requires the unit to be turned off, then on in
order to restore operation.
2. Using Remote On-Off at pin 2 (referenced to pin
1) of the Trigger port which sets the output to off
(disabled) or on (enabled) by toggling a signal
applied to the Trigger port. This requires sending
a digital command, either:
a. OUT:CONT HON - output on if pin 2 open or
high, output off if pin 2 shorted or low.
b. OUT:CONT LON - output on if pin 2 shorted or
low, output off if pin 2 open or high.
3. Using Remote On-Off at pin 2 (referenced to pin
1) of the Trigger port to disable the output and the
digital command OUTP ON to enable the output.
This requires first sending OUTP:CONT LOFF
command.
4. Using digital commands OUTP OFF and OUTP
ON to disable and enable the output. This
requires first sending OUTP:CONT DIS com-
mand.

14 228-1699 REV 8 110918
KEPCO, INC.  131-38 SANFORD AVENUE  FLUSHING, NY. 11355 U.S.A. TEL [phone]FAX [phone]
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IX — ADDITIONAL FEATURES
The user is urged to refer to the Operator’s Manual
for full explanations of all BOP-EL/GL 1KW features,
including:
• Changing the Default Power up Settings.
• Remote Shutdown.
• Digital Remote Operation - using SCPI com-
mands via one of the digital interfaces
• Analog Remote Operation - via Analog I/O
port.
• Details about Protect Limits and Software-
controlled limits.
• Storing/Recalling Power Supply Output Set-
tings.
• Waveform Generation - Sine, Triangle,
±Ramp, Square and Level segments. Remote
operation allows 1 waveform, maximum of
126 segments using LIST commands.
• Operator Testing.
• Calibration - via remote SCPI commands.
• Parallel/Series Configurations -increase cur-
rent capability, voltage capability, or both.

110918 228-1699 REV 8 15
KEPCO, INC.  131-38 SANFORD AVENUE  FLUSHING, NY. 11355 U.S.A. TEL [phone]FAX [phone]
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20.000[508.00]
21.439[544.54]
22.800[579.11]
21.564[547.73]
22.000[558.79]
23.863[606.12]
18.235 [463.16]
18.985 [482.21]
1.470[37.34]
1.738[44.15]
5.218[132.54]
2.215[56.27]
OBROUND 0.25x0.453 (4 LOC.)
16.835 [427.60]
17.675 [448.93]
18.018 [457.64]
18.805 [477.63]
FIGURE 7. BOP 1KW OUTLINE DIMENSIONS (SHEET 1 OF 2)

16 228-1699 REV 8 110918
KEPCO, INC.  131-38 SANFORD AVENUE  FLUSHING, NY. 11355 U.S.A. TEL [phone]FAX [phone]
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FIGURE 7. BOP 1KW OUTLINE DIMENSIONS (SHEET 2 OF 2)
REAR VIEW
BOP 1KW-EL
BOP 1KW-GL
22.000 [558.79]
SLIDES TRAVEL DISTANCE: 23.000 [584.2]
SEE NOTE 6.
SEE FIGURE 6.