KEPCO BOP 500M User manual

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 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
particular 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 [phone] !FAX [phone]
email: [e-mail] !World Wide Web: http://www.kepcopower.com
KEPCO INC.
An ISO 9001 Company.
©2011, KEPCO, INC
P/N 228-1733
HIGH VOLTAGE BIPOLAR
POWER SUPPLY
BOP 500M, BOP1000M
POWER SUPPLY

BOP-HV/ 020411
OPERATOR
SAFETY INSTRUCTIONS
Read these safety instructions, as well as the applicable installation and operating instructions contained
in this manual before using the power supply.
Do not touch the output terminals. The high voltage output is dangerous. Electric shock can cause injury or
death.
Do not remove the cover or disassemble the unit. There are no operator serviceable components or
adjustments inside the unit. High voltage components inside the unit can cause serious injury even with
input power disconnected.
Service must be referred to authorized personnel. Using the power supply in a manner not specified by
Kepco. Inc. may impair the protection provided by the power supply. Observe all safety precautions noted
throughout this manual. The following table lists symbols used on the power supply or in this manual
where applicable.
CAUTION
If this power supply is used in OEM equipment, the OEM equipment manufacturer is responsible for
attaching appropriate warning labels on the OEM equipment.
Operating the power supply outside the specified limits for input voltage, temperature, or other environ-
mental conditions noted in this manual can damage the power supply and void the warranty.
Safety Messages
The BOP HV protection circuit is designed to protect the load against unregulated high voltages. Upon
sensing a high temperature signal, the protection circuit shuts down the output stage before the overtem-
perature can destroy the transistors. In addition to that, the protection circuit shuts down the output stage
when there is a lapse of AC input power for more than 8 ms. This feature is provided so as to avoid an
uncontrolled output signal during the shut OFF of the power supply.
SAFETY SYMBOLS
SYMBOL Meaning
WARNING: RISK OF ELECTRIC SHOCK.
INDICATES THE POSSIBILITY OF BODILY INJURY OR DEATH.
CAUTION: REFER TO REFERENCED PROCEDURE.
INDICATES THE POSSIBILITY OF EQUIPMENT DAMAGE.
WARNING
!

228-1348 DC-COMP/INST 020411 A
Declaration of Conformity
Application of Council directives: 73/23/EEC (LVD)
93/68/EEC (CE mark)
Standard to which Conformity is declared:
EN61010-1:2001 (Safety requirements for electrical equipment for measurement,
control and laboratory use - Part 1)
Manufacturer's Name and Address: KEPCO INC.
131-38 SANFORD AVENUE
FLUSHING, N.Y. 11355 USA
Importer's Name and Address:
Type of Equipment: Component Power Supply
Model No.: [PRODUCT MODEL NUMBER]
Year of Manufacture:
I, the undersigned, declare that the product specified above, when used in conjunction with the condi-
tions of conformance set forth in the product instruction manual, complies with the requirements of the
Low Voltage Directive 73/23/EEC, which forms the basis for application of the CE Mark to this product.
Place: KEPCO Inc.
131-38 Sanford Ave.
Flushing, N.Y.11355 USA
Date:
Saul Kupferberg
(Full Name)
VP OF SALES
(position)
REPRESENTATIVECOPY

B228-1351 COND/CONFORM 020411
Conditions of Conformance
When this product is used in applications governed by the requirements of the EEC, the following restric-
tions and conditions apply:
1. For European applications, requiring compliance to the Low Voltage Directive, 73/23/EEC, this power
supply is considered a component product, designed for "built in“ applications. Because it is incom-
plete in construction, the end product enclosure must provide for compliance to any remaining electri-
cal safety requirements and act as a fire enclosure. (EN61010-1 Cl. 6, Cl. 7, Cl.8, Cl. 9 and EN61010-
1 annex F)
2. This power supply is designed for stationary installation, with mains power applied via a detachable
power supply cord or via direct wiring to the source power terminal block.
3. This power supply is considered a Class 1 (earthed) product, and as such depends upon proper con-
nection to protective earth for safety from electric shock. (EN61010-1 Cl. 6.5.4)
4. This power supply is intended for use as part of equipment meant for test, measurement and labora-
tory use, and is designed to operate from single phase, three wire power systems. This equipment
must be installed within a suitably wired equipment rack, utilizing a three wire (grounded) mains con-
nection. See wiring section of this manual for complete electrical wiring instructions. (EN61010-1 Cl.
6.5.4 and Cl.6.10.1)
5. This power supply has secondary output circuits that are considered hazardous, and which exceed
240 VA at a potential of 2V or more.
6. The output wiring terminals of this power supply have not been evaluated for field wiring and, there-
fore, must be properly configured by the end product manufacturer prior to use.
7. This power supply employs a supplementary circuit protector in the form of a circuit breaker mounted
on the front panel. This circuit breaker protects the power supply itself from damage in the event of a
fault condition. For complete circuit protection of the end product, as well as the building wiring, it is
required that a primary circuit protection device be fitted to the branch circuit wiring. (EN61010-1 Cl.
9.6.2)
8. Hazardous voltages are present within this power supply during normal operation. All operator adjust-
ments to the product are made via externally accessible switches, controls and signal lines as speci-
fied within the product operating instructions. There are no user or operator serviceable parts within
the product enclosure. Refer all servicing to qualified and trained Kepco service technicians.

228-1352 SAFETY - (COVER REMOVAL) 020411 C/(D BLANK)
SAFETY INSTRUCTIONS
1. Installation, Operation and Service Precautions
This product is designed for use in accordance with EN 61010-1 and UL 3101 for Installation Category 2,
Pollution Degree 2. Hazardous voltages are present within this product during normal operation. The prod-
uct should never be operated with the cover removed unless equivalent protection of the operator from
accidental contact with hazardous internal voltages is provided:
2. Grounding
This product is a Class 1 device which utilizes protective earthing to ensure operator safety.
3. Electric Shock Hazards
This product outputs hazardous voltage and energy levels as a function of normal operation. Operators
must be trained in its use and exercise caution as well as common sense during use to prevent accidental
shock.
There are no operator serviceable parts or adjustments within the product enclosure.
Refer all servicing to trained service technician.
Source power must be removed from the product prior to performing any servicing.
This product is factory-wired for the nominal a-c mains voltage indicated on the rat-
ing nameplate located adjacent to the source power connection on the product's rear
panel. To reconfigure the product input for other nominal mains voltages as listed
herein, the product must be modified by a trained service technician.
The PROTECTIVE EARTHING CONDUCTOR TERMINAL must be properly con-
nected prior to application of source power to the product (see instructions on instal-
lation herein) in order to ensure safety from electric shock.
PROTECTIVE EARTHING CONDUCTOR TERMINAL - This symbol indicates the
point on the product to which the protective earthing conductor must be attached.
EARTH (GROUND) TERMINAL - This symbol is used to indicate a point which is
connected to the PROTECTIVE EARTHING TERMINAL. The component installer/
assembler must ensure that this point is connected to the PROTECTIVE EARTH-
ING TERMINAL.
CHASSIS TERMINAL -This symbol indicates frame (chassis) connection, which is
supplied as a point of convenience for performance purposes (see instructions on
grounding herein). This is not to be confused with the protective earthing point, and
may not be used in place of it.
This symbol appears adjacent to any external terminals at which hazardous voltage
levels as high as 500V d-c may exist in the course of normal or single fault condi-
tions.
This symbol appears adjacent to any external terminals at which hazardous voltage
levels in excess of 500V d-c may exist in the course of normal or single fault condi-
tions.
!
!
!
!
!

BOPHVSVC020411 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
1.4 Electrical Specifications, Performance .................................................................................................... 1-2
1.5 Miscellaneous Features .......................................................................................................................... 1-4
1.6 Mechanical Specifications ....................................................................................................................... 1-6
1.7 Accessories ............................................................................................................................................. 1-7
SECTION 2 - INSTALLATION
2.1 Unpacking And Inspection....................................................................................................................... 2-1
2.2 Terminations............................................................................................................................................ 2-1
2.3 A-C Power Input Requirements............................................................................................................... 2-4
2.4 Cooling .................................................................................................................................................... 2-4
2.5 Preliminary Checkout .............................................................................................................................. 2-4
2.6 Installation ............................................................................................................................................... 2-6
SECTION 3 - OPERATION
3.1 Introduction.............................................................................................................................................. 3-1
3.2 BOP Operation with Local (Front Panel) Output Control......................................................................... 3-7
3.2.1 Voltage Mode Operation with Current Limiting .................................................................................. 3-7
3.2.2 Current Mode Operation with Voltage Limiting.................................................................................. 3-7
3.3 BOP Operation with Remote Control of the Voltage Control Channel .................................................... 3-8
3.3.1 Remote D-C Output Voltage Control By Resistance ......................................................................... 3-8
3.3.2 Remote D-C Voltage Control By Means of D-C Signal Voltage ........................................................ 3-10
3.3.3 The BOP as an Amplifier ................................................................................................................... 3-11
3.4 BOP Operation with Remote Control of the Current Control Channel..................................................... 3-14
3.4.1 Remote Control of the Bop Current Channel..................................................................................... 3-15
3.4.2 Remote Control of the Bop Current Limit........................................................................................... 3-19
3.4.3 Remote Control of the BOP Voltage Limit ......................................................................................... 3-21

LIST OF FIGURES
FIGURE TITLE PAGE
ii BOP1000SVC 020411
1-1 BOP (High Voltage) Operational Power Supply ............................................................................................ iv
1-2 BOP Output Characteristic ......................................................................................................................... 1-4
1-3 BOP Output Waveform with Phase Shift.................................................................................................... 1-5
1-4 Mechanical Outline Drawing, BOP – HV .................................................................................................... 1-8
2-1 Location of Internal Calibration Controls .................................................................................................... 2-1
2-2 BOP Terminations and Controls................................................................................................................. 2-2
2-3 A-C Source Voltage Selector, Location...................................................................................................... 2-4
2-4 Rear Programming Connector Wired For Front Panel Operation .............................................................. 2-5
2-5 Rack Installation of the BOP ...................................................................................................................... 2-6
3-1 BOP Voltage Control Channel.................................................................................................................... 3-2
3-2 BOP Current Control Channel.................................................................................................................... 3-3
3-3 BOP (±) Voltage Limiting Circuit................................................................................................................. 3-3
3-4 BOP (±) Current Limiting Circuit................................................................................................................. 3-4
3-5 Basic 2-Wire Load Connection and Grounding Connections
Between the BOP and the Load .............................................................................................................. 3-4
3-6 Load Connection with Error Sensing and Grounding Connections
Between the BOP and the Load .............................................................................................................. 3-5
3-7 Remote Potentiometer Control of the BOP D-C Output Voltage................................................................ 3-9
3-8 Remote D-C Output Voltage Control By Means of a Two
Terminal Resistance (Decade) ................................................................................................................ 3-9
3-9 Digital Control of the BOP D-C Output Voltage.......................................................................................... 3-10
3-10 BOP D-C Output Voltage Control with a High Impedance, (±) 1V Signal Source ...................................... 3-11
3-11 Graphs of Possible BOP Input/Output Waveshapes.................................................................................. 3-12
3-12 Basic Programming Circuit for Use of the BOP as a
Bipolar Amplifier (Voltage Mode)............................................................................................................. 3-13
3-13 Programming Circuit for Driving the BOP Output
Voltage with a Bipolar (±1V) Signal ........................................................................................................ 3-14
3-14 Programming Circuit for Driving the BOP Output Voltage with a High
Impedance Source, Using the Non-inverting Input of the Pre-amplifier .................................................. 3-15
3-15 Local (Front Panel) Control of the BOP Output Current
with the Bipolar Current Control .............................................................................................................. 3-15
3-16 Remote Potentiometer Control of the BOP Output Current ....................................................................... 3-16
3-17 Remote Output Current Control By Means of a Two Terminal Resistance................................................ 3-16
3-18 Digital Control of the BOP Output Current ................................................................................................. 3-17
3-19 BOP Output Current Control with a High Impedance (±) 1 Volt Signal Source.......................................... 3-17
3-20 Basic Programming Circuit for Use of the BOP as a Bipolar
Current Stabilized Amplifier ..................................................................................................................... 3-18
3-21 Programming Circuit for Driving the BOP Output Current with a Bipolar
Signal Less Than ±10V (Example Shown: ±1V Source) ......................................................................... 3-18
3-22 Programming Circuit for Driving the BOP Output Current with a
High Impedance Source .......................................................................................................................... 3-19
3-23 Local (Front Panel) Control of the BOP Current Limit Circuits ................................................................... 3-20
3-24 Symmetrical Remote Control of the BOP Current Limits ........................................................................... 3-20
3-25 Independent Remote Control of the BOP (+) IOand (–) IOLimits ............................................................. 3-21
3-26 Local (Front Panel) Control of the BOP Voltage Limit Circuits................................................................... 3-21
3-27 Symmetrical Remote Control of the BOP Voltage Limit Circuit.................................................................. 3-22
3-28 Independent Remote Control of the BOP Voltage Limit Circuits................................................................ 3-22

BOP1000SVC020411 iii
LIST OF TABLES
TABLE TITLE PAGE
1-1 Output Ranges and Impedance ..................................................................................................................1-2
1-2 Output Effects, Offsets and Reference Specifications ................................................................................1-2
1-3 Dynamic Specifications ...............................................................................................................................1-4
2-1 Internal Calibration Controls .......................................................................................................................2-1
2-2 BOP Terminations and Controls .................................................................................................................2-3

iv BOPSVC020411
FIGURE 1-1. BOP (HIGH VOLTAGE) OPERATIONAL POWER SUPPLY
/1107/1108

BOPHV020411 1-1
SECTION 1 - INTRODUCTION
1.1 SCOPE OF MANUAL
This manual contains instructions for the installation, operation and maintenance for the Models
BOP 500M and BOP 1000M Bipolar Operation Power Supplies, manufactured by Kepco, Inc.,
Flushing, New York, U.S.A.
1.2 GENERAL DESCRIPTION
The Kepco Model BOP 500M and BOP 1000M are high voltage power sources, which combine
the capabilities of fast programmable power supplies with a Class A output stage, which can
respond bidirectionally from zero. The “BOP” can be operated in a “Voltage Stabilizing” or “Cur-
rent Stabilizing” operating mode (selectable by a front panel switch). The BOP incorporates two
separate control channels, for local (front panel) or remote control of the output current and the
output voltage. In addition, bounding currents for bipolar voltage and current limiting are pro-
vided which may be adjusted manually (by front panel controls) or can be remotely pro-
grammed. All control and bounding channels are connected to the bipolar (Class A) output
stage via an “EXCLUSIVE-OR” gate, so that only one circuit is in control of the BOP output at
any one time. Some applications are listed below:
A) VOLTAGE MODE OPERATION. (Current limiting either front panel adjusted or remotely
programmed using the current limiting channel).
1) High speed, bipolar d-c voltage source (remote or locally controlled output).
2) Scaling or summing amplifier with or without d-c bias.
B) CURRENT MODE OPERATION. (Voltage limiting either front panel adjusted or remotely
programmed using the voltage limiting channel).
1) High speed, bipolar d-c current source (remote or locally controlled output).
2) Amplification of a-c currents with or without d-c bias.
The main chassis of the Model BOP Operational Power Supply/Amplifier is constructed of
plated steel. The wrap-around cover is perforated steel, plated and painted in a dark gray tex-
ture. The front panel material is aluminum, treated and painted light gray (Color 26440 per Fed.
Std. 595). The major part of the circuitry is located on plug-in type circuit boards for convenient
access.
1.3 ELECTRICAL SPECIFICATIONS, GENERAL
A) INPUT SOURCE REQUIREMENTS: 105 to 125Vac or 210 to 250Vac, 50 to 65 Hz, select-
able by the SOURCE VOLTAGE SELECTOR SWITCH (refer to Section 2, Fig. 2-3). Power
consumption approximately 250 Watts. Power factor: 0.8. The primary circuit is protected
by a fuse.
B) OPERATING TEMPERATURE RANGE: -20°C TO +65°C.
C) STORAGE TEMPERATURE RANGE: -40°C to +85°C.
D) COOLING: Forced air using a d-c fan blowing to the rear of the unit.

1-2 BOPHV020411
E) ISOLATION FROM GROUND: The BOP circuitry, its output and programming terminals
have no d-c connection to the chassis. The COMMON terminal of the BOP can be oper-
ated up to 500 volts (d-c or peak a-c) off ground. The common mode current (leakage from
output to ground) is less than 50µA (rms) or 200µA (p-p) at 115Vac power input, 60 Hz.
1.4 ELECTRICAL SPECIFICATIONS, PERFORMANCE
A) OUTPUT RANGES: See Table 1-1.
B) OUTPUT IMPEDANCE: See Table 1-1.
C) OUTPUT EFFECTS: See Table 1-2.
TABLE 1-1. OUTPUT RANGES AND IMPEDANCE
MODEL
d-c OUTPUT
RANGE
OUTPUT IMPEDANCE
VOLTAGE MODE CURRENT MODE
VOLTS mA d-c OHMS + SERIES L d-c OHMS + SHUNT C
BOP 500M -500 TO +500 -80 TO +80 0.05Ω+5mH 100MΩ+0.3µF
BOP 1000M -1000 TO +1000 -40 TO +40 0.2Ω+50mH 400 MΩ+ 0.4µF
TABLE 1-2. OUTPUT EFFECTS, OFFSETS AND REFERENCE SPECIFICATIONS
INFLUENCE QUANTITY
OUTPUT EFFECTS (1) PRE-AMPLIFIER
OFFSETS
REFERENCES
VOLTAGE
MODE
CURRENT
MODE ∆EIO ∆IIO
SOURCE: 105-125/210-250Va-c <0.0005% <0.0005%(5) <5µV(4) <1nA <0.0005%
LOAD: No Load - full load <0.0005% <0.005% _ _ <0.0005%
TIME: 8-hour (drift) <0.01% <0.01% <20µV(4) <1nA <0.005%
TEMPERATURE: Per °C <0.01% <0.01% <20µV(4) <1nA <0.005%
UNPROGRAMMED OUTPUT
<10 mV <25µA(4) __
<10µV
DEVIATION: (2) rms
(Ripple and Noise) p-p <200 mV(3) <500µA(4) __
<100µV
(1) Specifications are expressed as a percentage of the nominal power supply output (either voltage or current for either BOP 500M or BOP 1000M).
(2) Common terminal grounded so that the common-mode current does not flow through the load.
(3) 20 Hz to 10 MHz.
(4) For frequency components in the bandwidth of the current stabilizer. Beyond cutoff, noise will appear as a voltage component equal to the rated
voltage mode noise.
(5) Or 0.2 mA, whichever is greater.

BOPHV020411 1-3
NOTE: In this instruction manual, Kepco will follow the NEMA standards for d-c Power Supplies
and speak of the “Output Effects,” caused by changes in the “Influence Quantities.” The
“Output Effects” are specified either as a percentage change, referred to the maximum
specified output voltage (EO) or current (IO), or as an absolute change (∆EO, ∆IO), directly in
millivolts or milliamperes or both. The illustration below will clarify the NEMA terms.
1) DUE TO SOURCE = SOURCE EFFECT ....................................................................(FORMERLY LINE REGULATION)
2) DUE TO LOAD = LOAD EFFECT .........................................................................(FORMERLY LOAD REGULATION)
3) DUE TO TEMPERATURE = TEMPERATURE EFFECT COEFFICIENT ...............................(FORMERLY TEMPERATURE COEFFICIENT)
4) DUE TO TIME = DRIFT........................................................................................(FORMERLY STABILITY)
D) The BOP output effects, in response to the tabulated variation in the INFLUENCE QUAN-
TITIES, are given in Table 1-2 for the built-in input and feedback resistor values of the volt-
age and current channel preamplifiers.The tabulated OFFSET values (see Table 1-2) may
be used to calculate the BOP output 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:
VOLTAGE MODE: ∆EO= G [±∆Eio (1 + Rf/Ri) ± ∆Iio Rf± ∆Eref]
CURRENT MODE: ∆ IO= [±∆Eio (1 + Rf/Ri) ± ∆Iio Rf± ∆Eref]
RS= CURRENT SENSING RESISTOR (BOP 500M = 12.5Ω, BOP 1000M = 25Ω)
∆IO=TOTAL OUTPUT CURRENT CHANGE
G = CLOSED LOOP GAIN (BOP 500M = 50, BOP 1000M = 100)
WHERE:∆EO= TOTAL OUTPUT VOLTAGE CHANGE
∆Eref = CHANGE IN THE VOLTAGE REFERENCE
∆Eio = CHANGE IN OFFSET VOLTAGE
∆Iio = CHANGE IN OFFSET CURRENT
Rf= EXTERNAL FEEDBACK RESISTOR
Ri= EXTERNAL INPUT RESISTOR
NOTE: Variations in the value of the feedback and input resistors are considered secondary effects in the
Error Equation.
INFLUENCE QUANTITIES
1) SOURCE
2) LOAD
3) TEMPERATURE
4) TIME
1
10xRs
-----------------
1
10xRs
-----------------

1-4 BOPHV020411
E) DYNAMICS: The dynamic response of the BOP output are tabulated in Table 1-3 in both the
time domain (Output response to a step program) and in the frequency domain (bandwidth)
for large and small signals.
1.5 MISCELLANEOUS FEATURES
A) 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 FIG. 1-2.)
NOTE: Operation in the second quadrant of the graph must be derated as indicated.
TABLE 1-3. DYNAMIC SPECIFICATIONS
DYNAMIC SPECIFICATIONS
VOLTAGE CHANNEL CURRENT CHANNEL
BOP 500M BOP 1000M BOP 500M BOP 1000M
Closed Loop Gain 50 V/V 100 V/V 8 mA/V 4 mA/V
Bandwidth [d-c to f-3 dB] 5.3 KHz 1.8 KHz 2.0 KHz 1.5 KHz
Programming Time Constant 30 µsec. 88 µsec. 80 µsec 106 µsec.
Large Signal Frequency Response 6 KHz 1.9 KHz 2.5 KHz 1.6 KHz
Slewing Rate 18V/µsec. 12V/µsec. 1.25 mA/µsec 0.4 mA/µsec.
Load Recovery Time Constant 25 µsec. 75 µsec. 25 µsec. 50 µsec.
FIGURE 1-2. BOP OUTPUT CHARACTERISTIC

BOPHV020411 1-5
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. 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
B) REFERENCES: Two reference/bias sources (± 10V - 1 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 1-2.
C) OFFSET NULLING: Controls are provided to zero the initial offsets (Eio, Iio) of both the volt-
age and current control preamplifiers.
D) LOAD REACTANCE: To realize the full high speed potential of the BOP, the load charac-
teristics should be mainly resistive. Load capacitance and inductance up to 0.01µF and 0.5
mHy respectively can be tolerated without performance deterioration.
CAUTION:Stable operation into a purely inductive load in the Current Mode of opera-
tion requires a minimum series resistance of 25 ohms.
E) SERIES OR PARALLEL OPERATION: Not recommended.

1-6 BOPHV020411
F) VOLTAGE CONTROL CHANNEL (refer to Section 3 - FIG. 3-1). The BIPOLAR VOLTAGE
AMPLIFIER, with a fixed gain of 50 (BOP 500M) or 100 (BOP 1000M) is connected, via the
MODE switch, to the (unity gain) VOLTAGE PREAMPLIFIER. If the BIPOLAR VOLTAGE
SWITCH is “on”, the BOP output voltage can be locally controlled by means of the (front
panel) (±) 10 volt 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 programming connector for remote control of the output voltage. Con-
trol methods are described in Section 3 of this manual.
G) MODE SWITCH: The BOP is equipped with a front panel mounted MODE SWITCH, which
selects bipolar voltage or bipolar current control.
H) CURRENT CONTROL CHANNEL (refer to Section 3 - FIG. 3-2) The BIPOLAR CURRENT
AMPLIFIER, with fixed gain of 8 mA/V (BOP 500M) or 4 mA/V (BOP 1000M), is connected
via the MODE switch to the (unity gain) CURRENT PREAMPLIFIER. If the BIPOLAR CUR-
RENT SWITCH is “on”, the BOP output current can be locally (front panel) controlled (by
means of the ±10 volt bias source) from (-) 100% (through zero) to (+) 100% of the rated
value. The CURRENT PREAMPLIFIER is provided with a ZERO control and all its termi-
nals are available at the rear programming connector for remote control of the output cur-
rent. Control methods are described in Section 3 of this manual. I)
J) BOUNDING: (refer to Section 3 - FIG. 3-3 and 3-4). The BOP has four adjustable output
voltage/current limiting circuits: (-) EOLIMIT, (+) EOLIMIT, (-) IOLIMIT, (+) IOLIMIT for
overvoltage/overcurrent protection in either operating mode. All limiting circuits can be
screwdriver adjusted by means of four front panel controls. In addition, all four limits can be
remotely controlled by means of 0 to 10 volts 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 non-adjustable limit
circuits which define the four boundaries [(±) EOMAX. and (±) IOMAX.] of the BOP, and
provide protection against accidental overprogramming of the adjustable limits.
K) MODE LIGHTS AND FLAG SIGNAL OUTPUT: Four (4) front panel (LED type) indicator
lamps monitor the prevailing operating mode of the BOP. In addition, four (4) correspond-
ing flag signal outputs are provided at the rear programming connector. For each operating
condition (VOLTAGE MODE, CURRENT MODE, ±EOLIMIT, ±IOLIMIT) the corresponding
indicator lamp lights up and the associated flag signal changes its state from (TTL) logic “1”
to “0”.
NOTE: If operating against back-up current limit (PAR. J) all 4 lights go out. The four lights also
go out after the protection circuit has been energized.
L) STANDARDS: BOP models are designed and tested in accordance with NEMA Standard
for Stabilized Power Supplies, d-c output, Publication No. PY-1-1972.
1.6 MECHANICAL SPECIFICATIONS
A) DIMENSIONS: See “Mechanical Outline Drawing,” FIG. 1-4.
B) FINISH: See “Mechanical Outline Drawing,” FIG 1-4.
C) FRONT PANEL METERS: 2-1/2 inches wide, recessed. Accuracy ±2% full scale. Two (2)
“zero center” meters monitoring the ±d-c voltage and the ±d-c current are provided.

BOPHV020411 1-7
1.7 ACCESSORIES
A) MOUNTING FLANGES, for installation of the BOP into a standard (19-inch) equipment
rack (refer to Section 2, FIG. 2-5). (A pair included with each BOP). Kepco Part No. 128-
1282 (right), 128-1281 (left).
B) REAR PROGRAMMING CONNECTOR, Kepco Model PC-9, 30-terminal printed circuit
connector for all rear programming connections and flag signal outputs (One included with
each BOP).

1-8 BOPHV020411
FIGURE 1-4. MECHANICAL OUTLINE DRAWING, BOP – HV