KEPCO BOP 5-20DL User 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 and
revision number changes are documented with reference to the equipment serial num-
bers. Before using this Instruction Manual, check your equipment serial number to identify
your model. If in doubt, contact your nearest Kepco Representative, or the Kepco Docu-
mentation Office in New York, [phone], 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™
MODEL
OPERATOR’S MANUAL
KEPCO INC.
ORDER NO. REV. NO.
KEPCO, INC. 131-38 SANFORD AVENUE FLUSHING, NY. 11355 U.S.A. TEL [phone] FAX [phone]
email: [e-mail] World Wide Web: http://www.kepcopower.com
BOP 5-20DL
BIPOLAR OPERATIONAL POWER SUPPLY
100W, 200W AND 400W
BOP 5-20DL
POWER SUPPLY
©2015, KEPCO, INC
P/N 243-1367

BOP 5-20DL 020498 i
TABLE OF CONTENTS
SECTION PAGE
SECTION 1 - INTRODUCTION
1.1 Scope of Manual......................................................................................................................................... 1-1
1.2 General Description.................................................................................................................................... 1-1
1.3 Electrical Specifications, General............................................................................................................... 1-1
1.3.1 Static Specifications................................................................................................................................ 1-5
1.3.2 Dynamic Specifications........................................................................................................................... 1-6
1.4 Miscellaneous Features.............................................................................................................................. 1-6
1.4.1 Output Range.......................................................................................................................................... 1-6
1.4.2 Rear Programming Features................................................................................................................... 1-7
1.4.3 Output ON-OFF Port............................................................................................................................... 1-8
1.4.4 Load Reactance...................................................................................................................................... 1-10
1.4.5 Remote Turn-off...................................................................................................................................... 1-10
1.4.6 Circuit Breaker Shutdown Prevention (at Power Loss) Circuit................................................................ 1-10
1.4.7 References.............................................................................................................................................. 1-10
1.4.8 Series Or Parallel Operation ................................................................................................................... 1-10
1.4.9 Voltage Control Channel......................................................................................................................... 1-11
1.4.10 Mode Switch............................................................................................................................................ 1-11
1.4.11 Current Control Channel ......................................................................................................................... 1-11
1.4.12 Bounding................................................................................................................................................. 1-11
1.4.13 Mode Lights............................................................................................................................................. 1-12
1.4.14 Remote Output ON-OFF LED................................................................................................................. 1-12
1.4.15 Standards................................................................................................................................................ 1-12
1.5 Mechanical Specifications .......................................................................................................................... 1-12
1.6 Equipment Supplied.................................................................................................................................... 1-12
1.7 Accessories ................................................................................................................................................ 1-13
1.8 Safety.......................................................................................................................................................... 1-13
SECTION 2 - INSTALLATION
2.1 Unpacking and Inspection. ......................................................................................................................... 2-1
2.2 Terminations, Controls and Indicators........................................................................................................ 2-1
2.3 A-C Input Requirements ............................................................................................................................. 2-3
2.4 Cooling........................................................................................................................................................ 2-3
2.5 Preliminary Checkout.................................................................................................................................. 2-4
2.6 Installation of Full-rack BOP Models........................................................................................................... 2-6
2.6.1 Slide Installation...................................................................................................................................... 2-6
2.7 Load Connection......................................................................................................................................... 2-7
2.7.1 Load Connection, Local Sensing............................................................................................................. 2-7
2.7.2 Load Connection, Remote Sensing......................................................................................................... 2-8
2.7.3 A-c Ground.............................................................................................................................................. 2-8
2.7.4 D-c Ground.............................................................................................................................................. 2-8
SECTION 3 - OPERATION
3.1 Introduction................................................................................................................................................. 3-1
3.2 Power Supply Basics.................................................................................................................................. 3-1
3.2.1 External Programming Resistors............................................................................................................. 3-3
3.2.2 Active Programming Sources.................................................................................................................. 3-3
3.2.3 External Leads ........................................................................................................................................ 3-3
3.2.4 External Voltage Monitor......................................................................................................................... 3-3
3.2.5 External Current Monitor......................................................................................................................... 3-4
3.3 Local (Front Panel) Output Control............................................................................................................. 3-4
3.3.1 Voltage Mode Operation with Current Limiting........................................................................................ 3-4
3.3.2 Local Control of Current Limiting............................................................................................................. 3-6
3.3.3 Current Mode Operation with Voltage Limiting........................................................................................ 3-6
3.3.4 Local Control of Voltage Limiting............................................................................................................. 3-8
3.4 Remote Control of Voltage Channel........................................................................................................... 3-9
3.4.1 Remote Voltage Control Using Resistance (Potentiometer) ................................................................... 3-9

ii BOP 5-20DL 081915
TABLE OF CONTENTS
SECTION PAGE
3.4.2 Remote Voltage Control Using Resistance (Decade Box) ..................................................................... 3-10
3.4.3 Remote Voltage Control Using D-C Signal Voltage................................................................................ 3-11
3.4.4 Using the BOP as a Voltage Amplifier.................................................................................................... 3-12
3.4.5 Remote Control of Current Limiting........................................................................................................ 3-14
3.5 Remote Control of Current Control Channel.............................................................................................. 3-15
3.5.1 Remote Current Control Using Resistance (Potentiometer)................................................................... 3-16
3.5.2 Remote Current Control Using Resistance (Decade Box)...................................................................... 3-16
3.5.3 Remote Current Control Using D-C Signal Voltage................................................................................ 3-17
3.5.4 Using the BOP as a Current Amplifier.................................................................................................... 3-18
3.5.5 Remote Control of Voltage Limiting........................................................................................................ 3-19
3.6 Series and Parallel Connection of BOP Power Supplies........................................................................... 3-20
3.6.1 Series Connection, Master/slave Operation........................................................................................... 3-21
3.6.2 Circuit Breaker Control Circuit................................................................................................................ 3-22
3.6.3 Parallel Connection, Master/Slave Operation......................................................................................... 3-23
3.7 Indicator And Flag Logic Circuit................................................................................................................. 3-27
3.8 Digital Control of BOP Power Supplies...................................................................................................... 3-28
SECTION 4 - INTERNAL ADJUSTMENTS AND CALIBRATION
4.1 General...................................................................................................................................................... 4-1
4.2 Equipment Required .................................................................................................................................. 4-1
4.2.1 Adjustment of (±) 10 Volt Calibration Controls (A1R31, A1R32)............................................................ 4-2
4.2.2 Uncommitted Amplifier “A” Zero Adjustment (A1R41)............................................................................ 4-3
4.2.3 Uncommitted Amplifier “B” Zero Adjustment (A1R42)............................................................................ 4-3
4.2.4 Adjustment of Ammeter Zero Control (A1R50)....................................................................................... 4-3
4.2.5 Adjustment of IO-OFF Zero (A1A1R13) and EO-OFF Zero (A1A1R16)................................................. 4-4
4.2.6 Voltage Channel Zero Adjustment (A1R81) ........................................................................................... 4-4
4.2.7 Current Channel Zero Adjustment (A1R83)............................................................................................ 4-5
4.2.8 Calibration of IOFull Scale Output Current (A3R316) and Front Panel Ammeter (A7AR3B)................. 4-5

LIST OF FIGURES
FIGURE TITLE PAGE
BOP 5-20DL 081915 iii
1-2 BOP Output Characteristic.......................................................................................................................... 1-6
1-3 BOP Output WaveForm with Phase Shift ................................................................................................... 1-7
1-4 Boundaries and Limits ................................................................................................................................ 1-11
1-5 Mechanical Outline Drawing, BOP 5-20DL................................................................................................. 2-15
2-1 BOP 5-20DL, Terminations and Controls, Front Panel............................................................................... 2-1
2-2 BOP Terminations and Controls, Rear Panel ............................................................................................. 2-3
2-3 A-C Source Voltage Selection .................................................................................................................... 2-3
2-4 Slide Installation on Full-rack Units............................................................................................................. 2-7
2-5 Load Connection Using Local Sensing at Rear Panel................................................................................ 2-9
2-6 Load Connection Using Local Sensing at Front Panel ............................................................................... 2-9
2-7 Load Connection Using Remote Sensing at Rear Panel............................................................................ 2-10
2-8 Load Connection Using Remote Sensing at Front Panel ........................................................................... 2-10
3-1 Rear Programming Connector Terminals................................................................................................... 3-2
3-2 BOP Voltage Control Channel (Local Control, Local Sensing)................................................................... 3-4
3-3 BOP (±) Current Limiting Circuit (Local Control, Local Sensing) ................................................................ 3-6
3-4 BOP Current Control Channel (Local Control, Local Sensing) ................................................................... 3-7
3-5 BOP (±) Voltage Limiting Circuit (Local Control, Local Sensing)................................................................ 3-8
3-6 Remote Potentiometer Control of D-C Output Voltage............................................................................... 3-9
3-7 Remote D-C Output Voltage Control Using Two-Terminal Resistance (Decade)....................................... 3-10
3-8 Digital Control of the D-C Output Voltage................................................................................................... 3-11
3-9 D-C Output Voltage Control with Non-inverting Configuration and High Impedance ±1V Signal Source... 3-12
3-10 Graphs Of Possible Input/output Waveshapes........................................................................................... 3-13
3-11 Basic Programming Circuit for Use of BOP as Bipolar Amplifier (Voltage Mode)....................................... 3-13
3-12 Programming Circuit for Driving Output Voltage with.................................................................................. 3-14
3-13 Symmetrical Remote Control of the Current Limits..................................................................................... 3-15
3-14 Independent Remote Control of + IOand – IOLimits.................................................................................. 3-15
3-15 Remote Potentiometer Control of the BOP Output Current........................................................................ 3-16
3-16 Remote D-C Output Current Control Using Two-Terminal Resistance (Decade)....................................... 3-16
3-17 Digital Control of Output Current................................................................................................................. 3-17
3-18 BOP Output Current Control with Non-inverting Configuration
and High Impedance (±)1 Volt Signal Source......................................................................................... 3-17
3-19 Basic Programming Circuit for BOP as Bipolar Current-stabilized Amplifier............................................... 3-18
3-20 Programming Circuit for Driving Output Current with Bipolar Signal Less Than ±10V ............................... 3-18
3-21 Programming Circuit for Driving Output Current with a High Impedance Source....................................... 3-19
3-22 Symmetrical Remote Control of Voltage Limit ............................................................................................ 3-19
3-23 Independent Remote Control of +EOand –EOVoltage Limit...................................................................... 3-20
3-24 Series Connection (Master/Slave) of two BOP Power Supplies,
with Remote Error Sensing at the Common Load................................................................................... 3-21
3-25 Circuit Breaker Control Circuit, Simplified Diagram. ................................................................................... 3-23
3-26 Parallel Connection (Master/Slave) of Two BOP Power Supplies
with Remote Error Sensing at the Common Load................................................................................... 3-25
3-27 Alternative Parallel Connection (Master/Slave) for
Greater Precision and Stability of Two or More BOP Power Supplies..................................................... 3-26
3-28 Indicator Light and Flag Logic..................................................................................................................... 3-27
3-29 Simplified Schematic Diagram, BOP 5-20DL.............................................................................................. 3-29
4-1 Location of Internal Calibration Controls..................................................................................................... 4-2
4-2 Cover Removal and Internal Component Locations, BOP 5-20DL............................................................. 4-6

iv BOP 5-20DL 081915
LIST OF TABLES
TABLE TITLE PAGE
1-1 General Specifications ...............................................................................................................................1-2
1-2 Output Range and Output Impedance .......................................................................................................1-4
1-3 Static Specifications: Output Effects, Offsets, And Reference Specifications ............................................1-5
1-4 Dynamic Specifications for Nominal Resistive Load ..................................................................................1-6
1-5 Dynamic Specifications, in Current Mode for 2mH Inductive Load ............................................................1-6
1-6 Rear Programming Connector Terminal Functions .................................................................................... 1-7
1-7 Output ON-OFF Port A2J211, Pin Assignments ........................................................................................1-9
1-8 Current Loop Bandwidth Reduction by Adding Compensation
Capacitor to Rear Programming Connector (Resistive Load) ................................................................1-10
1-9 Equipment Supplied ...................................................................................................................................1-12
1-10 Accessories - Not Supplied ........................................................................................................................1-13
1-11 Safety Symbols ..........................................................................................................................................1-13
2-1 BOP Front Panel Terminations and Controls .............................................................................................2-1
2-2 BOP Rear Panel Terminations and Controls ..............................................................................................2-2
2-3 Chassis Slide Mounting Holes ....................................................................................................................2-6
4-1 Internal Calibration Controls .......................................................................................................................4-1

(v Blank)/vi BOP 5-20DL 081915
FIGURE 1-1. BOP 5-20DL POWER SUPPLY

BOP 5-20DL 081915 1-1
SECTION 1 - INTRODUCTION
1.1 SCOPE OF MANUAL.
This manual contains instructions for the installation and operation of the BOP 5-20DL 100 Watt
Bipolar Operational Power Supply manufactured by Kepco, Inc., Flushing, New York, U.S.A.
The L suffix indicates that the unit is optimized to drive large inductive loads in a stable manner.
Not that throughout this manual EOrepresents the rated output voltage, 5V, and IOrepresents
the rated output current, 20A.
1.2 GENERAL DESCRIPTION.
Kepco Series BOP Bipolar Power Supplies are fully dissipative, linear stabilizers for laboratory
and systems applications. The BOP is an all solid-state design, featuring IC operational amplifi-
ers in the control circuit section and silicon power transistors mounted on special fan-cooled
heat sinks in the complementary power stage.
The BOP has two bipolar control channels (voltage or current mode), selectable and individually
controllable either from their front panel controls, or by remote signals. Each of the principal con-
trol channels is protected by bipolar limit circuits. In these limit circuits the positive and negative
current or voltage limit points can be manually set or remotely programmed simultaneously or
individually. Automatic crossover between each principal control channel and its associated limit
channel is provided.
All control and limit channels are connected to the complementary output stage via an EXCLU-
SIVE OR gate, so that only one channel is in control of the BOP output at any one time. The
BOP output can be programmed over its full output range by a ±10 volt signal applied to either
one of the inputs to the voltage or the current channel. The limit control channels can be
remotely controlled by a 0 to +10 volt signal applied to their respective inputs. Two uncommitted
preamplifiers, with both inverting and non-inverting inputs available at the Rear Programming
Connector, can scale any programming source to the required input levels. Zero adjustments for
both amplifiers are provided.
The BOP is a fast programmable power supply. The dynamic specifications, given in Table 1-3,
are valid for resistive loads, while those shown in Table 1-5 are for a benchmark inductive load
of 2mH, with the BOP operating in current mode.
1.3 ELECTRICAL SPECIFICATIONS, GENERAL
See Table 1-1 for general specifications

1-2 BOP 5-20DL 081915
TABLE 1-1. GENERAL SPECIFICATIONS
SPECIFICATION RATING/DESCRIPTION CONDITION/COMMENT
A-C Input Voltage Nominal 104V / 115V / 208V / 230V Internal setting, see Figure 2-3
Range 95-113V / 105-125V / 190-226V / 210-250V
Brown-out 93V / 103V / 186V / 206V
Frequency 50 / 60 Hz nominal, ±3Hz range
A-C Input Current 11.0A Nominal output power,
sourcing, @115V/ 60Hz
Active Input power 1050W Nominal output power,
sourcing, @115V/ 60Hz
Power Factor 0.83 Nominal output power,
sourcing, @115V/ 60Hz
Input Leakage Current
(through earth-ground
connection)
0.1mA rms 115V/ 60Hz
Insulation Coordination Input Installation Cat. 2, Overvoltage Cat. 2,
Pollution Deg. 2 For TN or TT power systems
Output Installation Cat. 2, Overvoltage Cat. 2,
Pollution Deg. 2 Max. 500V between COMMON output terminal and chassis
Topology Linear Half bridge (AB Class)
Mode of operation Voltage Mode with
Current Limit and Voltage Limit
OR
Current Mode with
Voltage Limit and Current Limit
Mode of operation selectable
by front panel switch.
DC Transfer Factor
(Closed Loop Gain) Voltage in Voltage mode -0.5V/V ±0.5%, with default preamplifier For the default “inverting” configuration.
Current in
Current mode -2A/V ±0.1% with or without default pream- plifier, after recalibration/readjustment See Figures 3-9 and 3-18 for “non-inverting”configurationsin
voltage/current mode.
Preamplifier’s amplification
factor can be changed by
modifying connections and
adding resistors at rear
programming connector.
DC Transfer Factor is not
adjustable for voltage in voltage
mode nor for voltage and
current limits.
The DC Transfer Factor in
current mode is adjustable ±5%
by A3R316 (see PAR. 4.2.8).
Voltage in
Voltage limit +0.55V/V ±2% for positive limit -0.55V/V ±2% for negative limit
Current in
Current limit +2.2A/V ±2% for positive limit -2.2A/V ±2% for negative limit

BOP 5-20DL 081915 1-3
Output Power Source 100W (d-c or peak) For full operating temperature
range and full a-c input voltage
range.
Sink 100W (d-c or peak) Internal dissipative sink.
Fully operation in all voltage-
current quadrants.
Source/Sink Output
Range- Main channel Voltage Remote: -5V to +5V Local: -5.25V to +5.25V For remote, use programming signal in +10V to -10V range
(with the default preamplifier).
See “DC Transfer Factor” on
page 1- 2 for tolerances
Current Remote: -20A to +20A
Local: -21A to +21A
Source/Sink Output
Range- Limit channel Voltage +0.05V to +6.2V, for positive limit -0.05V to -6.2V, for negative limit Remote or local. For remote programming of all
limits, use programming signal
in 0V to +10V range.
±2% Full scale tolerance
Current +0.05A to +22A, for positive limit
-0.05A to -22A, for negative limit
Static Specifications See Table 1-3
Output Impedance See Table 1-2
Analog Readback
Accuracy Voltage 0.02% of rated output voltage (1mV) Zero to ±10V for zero to ± Rated output voltage or
current
Current 0.1% of rated output current (20mA)
Front Panel Monitoring
for Voltage and Current Type 3 and ½ digit DPMs
Resolution 0.1V for voltage, 0.1A for current
Accuracy 0.2% of rated output,
10mV for voltage and 40mA for current
Output Flags Voltage Mode TTL signal, logic 0 for voltage mode Not isolated, referenced to
common (signal-ground)
Current Mode TTL signal, logic 0 for current mode
Voltage Limit TTL signal, logic 0 for voltage limit
Current Limit TTL signal, logic 0 for current limit
Output On-Off See Table 1-7 (ON-OFF Port, pin 4) Isolated flag
Output On-Off control See Table 1-7 (ON-OFF Port, pin 2) Isolated control
Output Voltage
Off Level 0V ±0.01% EOnom Adjustable (see PAR. 4.2.5).
Output Current
Off Level 0A ±0.01% IOnom Adjustable (see PAR. 4.2.5).
Dynamic Specifications See Tables 1-5 and 1-8
Calibration See Table 4-1 Using reduced range 10-turn
trimpots for some signals
Kelvin Connection
(remote error sensing) max. 0.25V/ wire Without protection or limiting circuit.
TABLE 1-1. GENERAL SPECIFICATIONS
SPECIFICATION RATING/DESCRIPTION CONDITION/COMMENT

1-4 BOP 5-20DL 081915
Protection Input overcurrent Always trips input circuit breaker
Heatsink
overtemperature Always trips input circuit breaker
Input power loss Jumper on rear programming connector
offers choice whether or not to trip input cir-
cuit breaker
Series or Parallel
connection of identical
units
Type of
connection Master-Slave Contact factory for more than 3- units being connected in series
or in parallel
Implementation Using external wiring, no standard cables
provided
Front Panel See Figure 2-1 and Table 2-1
Rear Panel See Figure 2-2 and Tables 1-6 and 1-7 Provides access to rear
programming connector and
Output ON-OFF port
Output Leakage Current
(COMMON terminal to chassis-ground,
with GND-network disconnected)
0.05mA rms / 5mA p-p Nominal output power,
sourcing, @115V/ 60Hz
Temperature: Operating 0°C to +55°C
Storage -40°C to +85°C.
Humidity 0 to 95%RH Non-condensing
Cooling Two internal a-c fans Intake from the top & sides,
exhaust to the rear
Shock 20g/ 11ms/ 50% half sine Non-operating
Vibration 5-10Hz 10mm, double amplitude Non-operating
10-55Hz 2g
Altitude Sea level to 10,000ft For operating temperature
range
Dimensions See Figure 1-5
Weight 75 lbs Unpacked
TABLE 1-2. OUTPUT RANGE AND OUTPUT IMPEDANCE
MODEL
d-c OUTPUT RANGE CLOSED LOOP GAIN OUTPUT IMPEDANCE
EOI
OVOLTAGE
CHANNEL
GV(V/V)
CURRENT
CHANNEL
GI(A/V)
VOLTAGE MODE CURRENT MODE
SERIES
RSERIES LSHUNT RSHUNT C
100 WATTS
BOP 5-20DL 0 to ±5V 0 to ±20A 0.5 2.0 20 10H 20k10F
TABLE 1-1. GENERAL SPECIFICATIONS
SPECIFICATION RATING/DESCRIPTION CONDITION/COMMENT

BOP 5-20DL 081915 1-5
1.3.1 STATIC SPECIFICATIONS
The static specifications are listed in Table 1-3. The BOP output effects, in response to the tabu-
lated variations in the Influence Quantities, are given In Table 1-3 for the built-in input and feed-
back resistor values of the voltage and current channel preamplifiers.
The tabulated Preamplifier Offset values (see Table 1-3) may be used to calculate the BOP out-
put effects if the BOP voltage or current channel is remotely programmed and different values
for the feedback resistors (Rf) and the input resistors (Ri) are used. In this case, the tabulated
Preamplifier offsets and the values of the feedback and input resistors are combined in an “Error
Equation,” which represents the “Worst Case” output effect for the application at hand:
NOTE: Variations in the value of the feedback and input resistors are considered secondary
effects in the Error Equation.
VOLTAGE MODE:
CURRENT MODE:
Where:
= Total Output Current Change.
= Closed Loop Gain, Voltage Mode, (see Table 1-1).
= Closed Loop Gain, Current Mode, (see Table 1-1).
= Total Output Voltage Change.
= Change in the Voltage Reference.
= Change in Offset Voltage.
= Change in Offset Current.
= External Feedback Resistor.
= External Input Resistor.
TABLE 1-3. STATIC SPECIFICATIONS: OUTPUT EFFECTS, OFFSETS, AND
REFERENCE SPECIFICATIONS
INFLUENCE QUANTITY
OUTPUT EFFECTS (1) PREAMPLIFIER (4)
OFFSETS
VOLTAGE MODE CURRENT MODE REFERENCE
±10V
TYPICAL MAXIMUM TYPICAL MAXIMUM )
SOURCE VOLTAGE (min-max):  0.001%  0.005% <5V <1nA <0.0005%
LOAD (no load-full load):  0.008% 0.5mA 1mA ——<0.0005%
TIME (8-hour drift): 0.005% 0.01% 0.01% 0.02% <20V <1nA 0.005%
TEMPERATURE (per °C): 0.005% 0.01% 0.01% 0.02% <20V <1nA 0.005%
RIPPLE AND NOISE:(2) rms 1mV 3mV 0.01% 0.03% — — —
p-p (3) 10mV 30mV 0.1% 0.3% —— —
(1) Output effects, expressed as a percentage, are referred to the maximum rated output voltage or current.
(2) Measured with the common terminal grounded so that the common mode current does not flow through the load.
(3) Peak-to-peak ripple Is measured over a 20 Hz to 10 MHz bandwidth.
(4) To permit calculating of the effect of non-standard control current (less than the normal 1 mA) of non-standard gain
ratios.
Eio
Iio
EoGVEio 1R
fRi
+IioRfEref +=
IoGIEio 1R
fRi
+IioRfEref +=
Io
GV
GI
Eo
Eref
Eio
Iio
Rf
Ri

1-6 BOP 5-20DL 081915
1.3.2 DYNAMIC SPECIFICATIONS
Dynamic specifications are listed in Table 1-5 for a nominal resistive load, and in Table 1-5 for a
2mH inductive load (current mode). The typical dynamic responses of the BOP output are tabu-
lated in both the time domain (Output response to a step program) and in the frequency domain
(bandwidth) for large and small signals.
1.4 MISCELLANEOUS FEATURES
1.4.1 OUTPUT RANGE
The BOP can be locally (front panel) adjusted, or remotely programmed, from (–)100% to
(+)100% of its specified d-c voltage and current range. The Class A bipolar output stage permits
operation as either a source or a sink. (See Figure 1-2).
FIGURE 1-2. BOP OUTPUT CHARACTERISTIC
TABLE 1-4. DYNAMIC SPECIFICATIONS FOR NOMINAL RESISTIVE LOAD
MODEL
3dB
BANDWIDTH
(KHz)
RISE AND FALL
TIME 10-90%
(S)
LARGE SIGNAL FRE-
QUENCY RESPONSE
(KHz)
SLEW
RATE
REOVERY AT
STEP LOAD
(S)
Voltage Current Voltage Current Voltage Current Voltage Current Voltage Current
BOP 5-20DL 3.5 10 125 50 3.5 10 0.08V/S0.9A/S 250 75
TABLE 1-5. DYNAMIC SPECIFICATIONS, IN CURRENT MODE FOR 2mH INDUCTIVE LOAD
MODEL 3dB BANDWIDTH
(Hz)
RISE & FALL TIME
10%-90%
msec)
BOP 5-20DL 140 2.5

BOP 5-20DL 081915 1-7
NOTE: The BOP is operating as a source if the direction of its output voltage is the same as
the direction of its output current. The BOP is operating as a sink if the direction of its
output voltage is opposite that of its output current. An illustrative case is shown in Fig-
ure. 1-3, where the BOP is programmed to deliver a sine wave output and where the
load produces a phase shift between the output voltage and current.’
FIGURE 1-3. BOP OUTPUT WAVEFORM WITH PHASE SHIFT
1.4.2 REAR PROGRAMMING FEATURES
The external Rear Programming Connector (See Table 2-2, Items 22 and 23 and Figure 3-1), is
a 50-pin edge connector, providing access to all circuit features. The BOP is delivered with one
(1) PC-15 connector, which is prewired with jumpers for local (front-panel) operation. Spare con-
nectors may be purchased from Kepco under the model number PC-12 for the unwired connec-
tor and PC-15 for a connector wired for local operation. The functions of the Rear Programming
Connector terminals are listed below in Table 1-6.
TABLE 1-6. REAR PROGRAMMING CONNECTOR TERMINAL FUNCTIONS
TERMINAL
(Figure 3-1 FUNCTION DESCRIPTION
1 Current Limit Bias Refer to PAR. 3.3.2
3 Voltage Limit Bias Refer to PAR. 3.3.4
11
Preamp “A” Refer to PAR. 3.4.1 for example.
9
5
7
15
Preamp “B” Refer to PAR. 3.5 for example.
13
2
4
6+E
oLimit Input Refer to PAR. 3.3.4
Eo
Io
SOURCE SOURCE
SINK SINK
(+)
(-)
3043440

1-8 BOP 5-20DL 081915
1.4.3 OUTPUT ON-OFF PORT
The output of the unit can be turned ON (enabled) or turned OFF (disabled) from the rear panel
isolated ON-OFF Port. The pin configuration and requirements for the associated signals for the
Output ON-OFF port are described in Table 1-7. Output off signal value is adjustable (see PAR.
4.2.5):
to 0V ±0.001V by EO- OFF ZERO potentiometer in voltage mode
to 0A ±0.001A by IO- OFFZERO potentiometer in current mode.
NOTE: Contact Kepco if digital control of the model BOP 5-20DL power supply is desired.
Before installing any BIT card for digital control, the output ON/OFF feature must be
disabled. Once disabled, ON-OFF control is via the digital control card.
8+IoLimit Input Refer to PAR. 3.3.2
32 –EoLimit Input Refer to PAR. 3.3.4
34 –IoLimit Input Refer to PAR. 3.3.2
10 Current Sensing Amp. Output Analog output voltage (0 to ±10V, 1 mA max) proportional
to the prevailing BOP output current for remote metering
or monitoring.
20 Voltage Sensing Amp. Output Analog output voltage (0 to ±10V, 1 mA max) proportional
to the prevailing BOP output voltage.
21, 43, 44,
45, 46 Not Used.
12, 14 Reserved. (Not to be used).
16, 18 Current Mode Compensating Terminals Refer to PAR. 1.4.4
26, 36 Turn-off Signal Output Refer to PAR, 3.6.2
24 Circuit Breaker Control Refer to PAR, 3.6.2
41 Non-isolated Turn-off Signal Input Refer to PAR, 3.6.2
47/48,
49/50 Optically Isolated Turn-off Signal Input Refer to PAR, 3.6.2
17 Voltage Comparison Amp Input Analog input voltage of 0 to ±10V will produce 0 to ± full
output voltage.
19 Current Comparison Amp Input Analog input voltage of 0 to ±10V will produce 0 to ± full
output current.
22 –10V Reference Voltage 4mA Max Refer to PAR. 3.4.1 for examples.
28 +10V Reference Voltage 4mA Max Refer to PAR. 3.4.1 for examples.
23, 25, 27,
29, 31, 33 Sensing Common
30 Reserved (Not to be used).
35 Reserved (Not to be used).
37 +5V Built-in TTL Logic supply, 5V @ 40mA max.
38 IoLimit Flag Refer to PAR. 3.7
39 EoLimit Flag Refer to PAR. 3.7
40 EoMode Flag Refer to PAR. 3.7
42 IoMode Flag Refer to PAR. 3.7
TABLE 1-6. REAR PROGRAMMING CONNECTOR TERMINAL FUNCTIONS (CONTINUED)
TERMINAL
(Figure 3-1 FUNCTION DESCRIPTION

BOP 5-20DL 081915 1-9
TABLE 1-7. OUTPUT ON-OFF PORT A2J211, PIN ASSIGNMENTS
PIN SIGNAL NAME FUNCTION
1---NotUsed
2 ON-OFF_CTRL Optically isolated signal that controls output to be either ON (enabled)
or OFF (disabled).
OFF: 0V to 0.4V or no connection (open circuit) at pin 2, referenced
to pin 3. Turns OFF within 100S 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.
ON: 3.5V to 24V d-c at pin 2 referenced to pin 3; input current is 1mA
±0.3mA. Turns ON within 100S 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.
3 ISO_GND Return for ON-/OFF_CTRL and for /ON_OFF_FLAG signals.
4 /ON-OFF_FLAG Flags whether output set to ON or OFF. This isolated flag signal is the
collector of an optocoupler-transistor, with the emitter connected to pin
3. Optocoupler transistor is saturated when the output is ON (enabled).
Current through the transistor should not exceed 1.6mA and supply
voltage should not exceed 24V.
OFF level: determined by (Vext) - (Rext) (Icoff) where:
Vext = External positive voltage
Rext = Vext/1.6mA (External current-limiting resistor).
Icoff = 0.0001mA (optocoupler transistor maximum dark current)
The flag’s rise time for either voltage mode with no load, or current
mode with short circuit, is within 150S max (between 10% point of
controlling signal and 90% point of on-off flag).
ON level: +0.4V max. for 1.6mA current. The flag’s fall time for either
voltage mode with no load, or current mode with short circuit, is within
150S max (between 90% point of controlling signal and 10% point of
of on-off flag).
5---NotUsed
6---NotUsed

1-10 BOP 5-20DL 081915
1.4.4 LOAD REACTANCE
The BOP 5-20DL power supply is optimized for driving large inductor loads (L suffix). Factory
test were performed with loads up to 1H, however higher values are possible.
CAUTION: 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 pos-
sible 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 crowbar element connected directly at the output of the
BOP. An alternative is a Normally-Closed Contactor connected across the
output of the BOP. These options may also be combined.
When driving an inductive load, if the system becomes unstable at the crossover between volt-
age limit mode and current mode, the BOP 5-20DL can be further optimized by reducing the
current loop bandwidth. This can be accomplished by connecting a ceramic capacitor across
pins 16 and 18 of the Rear Programming Connector (see Figure 3-1 and Table 1-6). Refer to
Table 1-8 for bandwidths resulting from typical capacitor values.
1.4.5 REMOTE TURN-OFF
Remote turn-off of the BOP, equivalent to tripping the front panel ON/OFF circuit breaker to
OFF, can be accomplished by a contact closure, or by an optically isolated signal.
1.4.6 CIRCUIT BREAKER SHUTDOWN PREVENTION (AT POWER LOSS) CIRCUIT
See PAR. 3.6.2.
1.4.7 REFERENCES
Two reference/bias sources (±10V at 4 mA max.) are provided for control and biasing purposes.
These reference sources are available at the rear programming connector (with reference to the
“COMMON” terminal). Their specifications are tabulated In Table 1-3.
1.4.8 SERIES OR PARALLEL OPERATION
See PAR. 3.6
TABLE 1-8. CURRENT LOOP BANDWIDTH REDUCTION BY ADDING COMPENSATION
CAPACITOR TO REAR PROGRAMMING CONNECTOR (RESISTIVE LOAD)
Ceramic Capacitor Value connected across Rear Programming Connector pins 16 and 18
0.01F 0.022F0.047F0.1F0.22F0.47F1.0F
3dB Bandwidth 2.1KHz 1.7KHz 1.1KHz 0.6KHz 0.31KHz 0.12KHz 0.06KHz
!

BOP 5-20DL 081915 1-11
1.4.9 VOLTAGE CONTROL CHANNEL
The Bipolar Voltage Amplifier, with a fixed gain (See Table 1-1 for gain value) is connected via
the MODE switch to the Voltage Preamplifier (see Figure 3-2). If the VOLTAGE CONTROL
switch is on, the BOP output voltage can be locally controlled by means of the (front panel) (±)
10 volts bias source, from (–) 100% (through zero) to (+) 100% of the rated value. The Voltage
Preamplifier is provided with a Zero control and all its terminals are available at the Rear Pro-
gramming Connector for remote control of the output voltage. Control methods are described in
PAR. 3.4.
1.4.10 MODE SWITCH
The BOP is equipped with a front panel-mounted MODE switch, which selects bipolar voltage or
bipolar current control. See paragraph 1.4.14 for remote MODE control.
1.4.11 CURRENT CONTROL CHANNEL
The Bipolar Current Amplifier, with a fixed gain (See Table 1-2 for gain value) is connected via
the MODE switch to the Current Preamplifier (see Figure 3-4). If the CURRENT CONTROL
switch is on, the BOP output current can be locally controlled by means of the (front panel) (±)
10 volts bias source, from (–) 100% (through zero) to (+) 100% of the rated value. The Current
Preamplifier is provided with a Zero control and all its terminals are available at the Rear Pro-
gramming Connector for remote control of the output current. Control methods are described in
PAR. 3.5.
1.4.12 BOUNDING
The BOP has four output voltage/current limiting circuits (–) EoLimit, (+) EoLimit, (–) IoLimit
and (+) IoLimit for overvoltage/overcurrent protection in either operating mode (refer to Figures
3-5 and 3-3). All limiting circuits can be screwdriver adjusted by means of four front panel con-
trols. In addition, all four limits can be remotely controlled by means of 0 to 10 volt d-c control
voltages. The four limits may be programmed independently, or the (±) voltage and (±) current
limits can be controlled in pairs. The adjustable/programmable limit controls are backed-up by
front panel-adjustable limit circuits which define the four boundaries [(±) Eomax. and (±) Iomax.]
of the BOP, and provide protection against accidental over-programming of the adjustable limits.
The four boundary quantities, (±) Eomax. and (±) Iomax. as applied to the Limit Channel, are
actually about 10% greater than the rated values Eomax. and Iomax. for each BOP model.
Similarly, the quantities EoZero and IoZero are not really zero, but are approximately 0.5% of
the rated Eomax. and Iomax. values. (See Figure 1-4.)
FIGURE 1-4. BOUNDARIES AND LIMITS

1-12 BOP 5-20DL 081915
1.4.13 MODE LIGHTS
Four (4) front panel (LED type) indicator lamps monitor the prevailing operating mode of the
BOP. For each operating condition (Voltage Mode, Current Mode, ± EoLimit, ± IoLimit) the cor-
responding indicator lamp energizes. Simultaneous TTL flags are available on the Rear Pro-
gramming Connector. See PAR. 3.7
1.4.14 REMOTE OUTPUT ON-OFF LED
This LED indicates the status of the output, in accordance with the signal received at the rear
panel OUTPUT ON-OFF Port. The indicator is on for output on (enabled) and off for output off
(disabled).
1.4.15 STANDARDS
BOP models are designed and tested in accordance with NEMA Standard for Stabilized Power
Supplies, d-c output, Publication No. PY-1.1972.
1.5 MECHANICAL SPECIFICATIONS
See Mechanical Outline Drawing, Figure 1-5 for dimensions and finish. Two (2) digital meters,
monitoring the ± d-c output voltage and the ± d-c output current, are provided. The full rack BOP
5-20DL model is 75 lbs. (34 kg) unpacked.
1.6 EQUIPMENT SUPPLIED
Equipment supplied is listed in Table 1-9.
TABLE 1-9. EQUIPMENT SUPPLIED
ITEM PART NUMBER QUANTITY
Rear Programming Connector (Local Control) - 50-terminal printed circuit connector for
all rear programming connections and flag-signal outputs, wired for local (front panel)
control of the BOP output.
PC-15 1
Power Cord, IEC connection to standard 115 VAC (USA), 118-0557 1
Mounting Flanges - for installation of the BOP into a standard (19 inch) equipment rack
Right
Left. 128-0927 128-0926 1 1
ON-OFF PORT mating connector, Modular telephone plug, RJ12, 6- contacts. Allows
access to Remote Output On-Off control and flag signals 142-0536 (TEConnectivity,
5-555176-3)
1