KEPCO KLN Series User manual

KEPCO®
THE POWER SUPPLIER™
MODEL
OPERATOR’S MANUAL
ORDER 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
KEPCO INC.
An ISO 9001 Company.
KLN 750W
PROGRAMMABLE D-C POWER SUPPLY
1U HALF RACK
KLN 750W
POWER SUPPLY
©2012, KEPCO, INC
P/N 243-1339-r4
IMPORTANT NOTES:
1) This manual is valid for the following Firmware Versions:
FIRMWARE VERSION NOTE.
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 firmware version num-
ber to identify your model. If in doubt, contact your nearest Kepco Representative, or the
Kepco Documentation Office in New York, [phone], requesting the correct revision
for your particular model and firmware version 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.
1.60 and higher
Via Acquanera, 29 22100 Como
tel. 031.526.566 (r.a.) fax 031.507.984
[e-mail] www.calpower.it

KLN 750W/ 121912 A
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 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. Table 1-5 lists symbols used on the power supply or in this manual where applica-
ble.
WARNING

KLN 750W 121912 i
TABLE OF CONTENTS
SECTION PAGE
SECTION 1 - INTRODUCTION
1.1 Scope of Manual ..................................................................................................................................... 1-1
1.2 General Description................................................................................................................................. 1-1
1.3 Specifications .......................................................................................................................................... 1-2
1.4 Local Control ........................................................................................................................................... 1-7
1.5 Remote Control ....................................................................................................................................... 1-7
1.6 Analog Control......................................................................................................................................... 1-8
1.7 Features .................................................................................................................................................. 1-8
1.7.1 Digital Calibration............................................................................................................................... 1-8
1.7.2 Protection........................................................................................................................................... 1-8
1.7.3 Saving and Recalling Settings........................................................................................................... 1-8
1.7.4 Parallel and Series Configurations .................................................................................................... 1-8
1.7.5 Miscellaneous Features..................................................................................................................... 1-8
1.8 Equipment Supplied ................................................................................................................................ 1-9
1.9 Accessories ............................................................................................................................................. 1-9
1.10 Safety ...................................................................................................................................................... 1-10
SECTION 2 - INSTALLATION
2.1 Unpacking and Inspection ....................................................................................................................... 2-1
2.2 Terminations and Controls ...................................................................................................................... 2-1
2.3 Preliminary Operational Check................................................................................................................ 2-4
2.4 Installation ............................................................................................................................................... 2-5
2.4.1 Rack Mounting................................................................................................................................... 2-5
2.4.1.1 Mounting One 1/2-rack Unit in 19-inch Rack ............................................................................... 2-5
2.4.1.2 Mounting Two 1/2-rack Units in 19-inch Rack ............................................................................. 2-6
2.5 Wiring Instructions................................................................................................................................... 2-6
2.5.1 Safety Grounding............................................................................................................................... 2-7
2.5.2 Source Power Connections ............................................................................................................... 2-7
2.5.3 D-C Output Grounding....................................................................................................................... 2-7
2.5.4 Power Supply/Load Interface............................................................................................................. 2-8
2.5.5 Load Connection - General................................................................................................................ 2-8
2.5.6 Load Connection Using Local Sensing.............................................................................................. 2-9
2.5.7 Load Connection Using Remote Sensing.......................................................................................... 2-10
2.6 Cooling .................................................................................................................................................... 2-11
2.7 Setting up the unit ................................................................................................................................... 2-11
2.7.1 Setup for Local Operation.................................................................................................................. 2-11
2.7.2 Setup for Remote Operation via RS-485........................................................................................... 2-11
2.7.3 Setup for Remote Operation via GPIB............................................................................................... 2-12
2.7.4 Setup for Remote Operation via LAN ................................................................................................ 2-12
2.8 Multiple Unit Configurations .................................................................................................................... 2-12
2.8.1 Series Connections............................................................................................................................ 2-13
2.8.1.1 Series Connections Using Optional Series Connection Kit.......................................................... 2-13
2.8.2 Parallel Connections.......................................................................................................................... 2-14
2.8.2.1 Parallel Connections Using Optional Parallel Connection Kit ...................................................... 2-15
SECTION 3 - OPERATION
3.1 General.................................................................................................................................................... 3-1
3.2 Power Supply Basics............................................................................................................................... 3-1
3.2.1 Turning the Power Supply On............................................................................................................ 3-3
3.2.2 Menu Structure .................................................................................................................................. 3-5
3.3 Local Mode Operation ............................................................................................................................. 3-5
3.3.1 Setting Local/Remote Mode .............................................................................................................. 3-5
3.3.1.1 Front Panel Lockout..................................................................................................................... 3-7
3.3.2 Set Voltage or Overvoltage Protection (OVP) ................................................................................... 3-7
3.3.3 Set Current or Overcurrent Protection (OCP).................................................................................... 3-7
3.3.4 OVP/OVC Operation and Recovery .................................................................................................. 3-7

ii KLN 750W 121912
TABLE OF CONTENTS
SECTION PAGE
3.3.5 Enabling/Disabling DC Output Power ............................................................................................... 3-8
3.3.6 Storing Power Supply Output Settings.............................................................................................. 3-8
3.3.7 Recalling Power Supply Output Settings .......................................................................................... 3-8
3.3.8 Output Mode (Voltage Set: Direct or Enter) ...................................................................................... 3-9
3.3.9 Power On Setting.............................................................................................................................. 3-9
3.3.10 Rise Time (Ramp up)........................................................................................................................ 3-9
3.3.11 Fall Time (Ramp Down) .................................................................................................................... 3-10
3.3.12 Memory Flag ..................................................................................................................................... 3-10
3.3.13 Beep.................................................................................................................................................. 3-10
3.3.14 Display Brightness ............................................................................................................................ 3-11
3.3.15 I/O Select .......................................................................................................................................... 3-11
3.3.16 RS-485 Baud Rate............................................................................................................................ 3-11
3.3.17 GPIB Address (GPIB Interface Only)................................................................................................ 3-12
3.3.18 RS-485 Address................................................................................................................................ 3-12
3.3.19 DHCP Function On/Off Control (LAN Interface Only) ....................................................................... 3-12
3.3.20 Set 1st Part of IP Address (LAN Interface Only)............................................................................... 3-13
3.3.21 Set 2nd Part of IP Address (LAN Interface Only).............................................................................. 3-13
3.3.22 Set 3rd Part of IP Address (LAN Interface Only) .............................................................................. 3-13
3.3.23 Set 4th Part of IP Address (LAN Interface Only)............................................................................... 3-14
3.3.24 Parallel/Serial Master/Slave Setup ................................................................................................... 3-14
3.3.25 External Control of Output On/Off..................................................................................................... 3-14
3.3.26 Enable Voltage Control via Programming Control Port..................................................................... 3-15
3.3.27 Enable Current Control via Programming Control Port..................................................................... 3-15
3.3.28 Calibration Access ............................................................................................................................ 3-15
3.3.29 View Serial Number .......................................................................................................................... 3-16
3.3.30 View Firmware Version ..................................................................................................................... 3-16
3.3.31 View Hardware Version .................................................................................................................... 3-16
3.3.32 View 1st Part of IP Address (LAN Interface Only) ............................................................................ 3-16
3.3.33 View 2nd Part of IP Address (LAN Interface Only) ........................................................................... 3-17
3.3.34 View 3rd Part of IP Address (LAN Interface Only) ............................................................................ 3-17
3.3.35 View 4th Part of IP Address (LAN Interface Only) ............................................................................ 3-17
3.3.36 View 1st Part of Subnet Mask Address (LAN Interface Only)........................................................... 3-18
3.3.37 View 2nd Part of Subnet Mask Address (LAN Interface Only).......................................................... 3-18
3.3.38 View 3rd Part of Subnet Mask Address (LAN Interface Only) .......................................................... 3-18
3.3.39 View 4th Part of Subnet Mask Address (LAN Interface Only)........................................................... 3-18
3.3.40 View 1st Part of MAC Address (LAN Interface Only)........................................................................ 3-19
3.3.41 View 2nd Part of MAC Address (LAN Interface Only)....................................................................... 3-19
3.3.42 View 3rd Part of MAC Address (LAN Interface Only) ....................................................................... 3-19
3.3.43 Reset................................................................................................................................................. 3-20
3.3.44 IP Address Reset .............................................................................................................................. 3-20
3.3.45 Viewing Error Codes. ........................................................................................................................ 3-20
3.4 Series/Parallel Operation........................................................................................................................ 3-20
3.4.1 Series Operation ............................................................................................................................... 3-21
3.4.2 Discontinuing Series Operation ........................................................................................................ 3-21
3.4.3 Parallel Operation ............................................................................................................................. 3-22
3.4.4 Discontinuing Parallel Operation....................................................................................................... 3-22
3.5 Analog Remote Mode Programming ...................................................................................................... 3-23
3.5.1 Remote Output On/off....................................................................................................................... 3-23
3.5.2 Remote Emergency Shutdown ......................................................................................................... 3-23
3.5.3 Remote Control of Output Voltage Using an analog signal .............................................................. 3-23
3.5.4 Remote Control of Output Current Using an analog signal............................................................... 3-24
3.5.5 Recalling Previously Stored Setting Using Programming Control Port............................................. 3-24
3.5.6 Monitoring Output Status Using Programming Control Port ............................................................. 3-24
3.5.6.1 Monitor Output Voltage or Current .............................................................................................. 3-24
3.5.6.2 Monitor Unit Status...................................................................................................................... 3-25

KLN 750W 121912 iii
TABLE OF CONTENTS
SECTION PAGE
3.6 Digital Remote Mode Programming ........................................................................................................ 3-25
3.6.1 RS-485 Operation.............................................................................................................................. 3-25
3.6.2 GPIB Operation (If Option Installed).................................................................................................. 3-25
3.6.2.1 IEEE 488 (GPIB) Bus Protocol .................................................................................................... 3-26
3.6.3 LAN Operation (If Option Installed).................................................................................................... 3-27
3.6.3.1 LAN Connection........................................................................................................................... 3-27
3.7 SCPI Programming ................................................................................................................................. 3-31
3.7.1 SCPI Messages ................................................................................................................................. 3-31
3.7.2 Common Commands/Queries ........................................................................................................... 3-31
3.7.3 SCPI Subsystem Command/query Structure .................................................................................... 3-31
3.7.3.1 Calibrate Subsystem.................................................................................................................... 3-31
3.7.3.2 Display Subsystem ...................................................................................................................... 3-31
3.7.3.3 Fetch Subsystem ......................................................................................................................... 3-31
3.7.3.4 Output Subsystem ....................................................................................................................... 3-32
3.7.3.5 Source Subsystem....................................................................................................................... 3-32
3.7.3.6 System Subsystem ...................................................................................................................... 3-32
3.7.4 Understanding The Command Structure ........................................................................................... 3-32
SECTION 4 - CALIBRATION
4.1 General.................................................................................................................................................... 4-1
4.2 Equipment Required................................................................................................................................ 4-1
4.3 Voltage Calibration Procedure ................................................................................................................ 4-1
4.4 Current Calibration Procedure................................................................................................................. 4-3
APPENDIX A - SCPI COMMON COMMAND/QUERY DEFINITIONS
A.2 *CLS — Clear Status Command ............................................................................................................ A-1
A.3 *IDN? — Identification Query ................................................................................................................. A-1
A.4 *OPC — Operation Complete Command............................................................................................... A-1
A.5 *OPC? — Operation Complete Query.................................................................................................... A-2
A.6 *RST — Reset Command ...................................................................................................................... A-2
A.7 *TST? — Self Test Query....................................................................................................................... A-2
APPENDIX B - SCPI COMMAND/QUERY DEFINITIONS
B.1 Introduction............................................................................................................................................. B-1
B.2 Numerical Values ................................................................................................................................... B-1
B.3 DISP:CONTrast Command.................................................................................................................... B-1
B.4 DISP:CONTrast? Query ........................................................................................................................ B-1
B.5 FETCh? Query ....................................................................................................................................... B-2
B.6 OUTPut Command................................................................................................................................. B-2
B.7 OUTPut? Query ..................................................................................................................................... B-2
B.8 OUTPut:PON Command........................................................................................................................ B-2
B.9 OUTPut:PON? Query............................................................................................................................. B-2
B.10 SOURce:CURRent Command .............................................................................................................. B-3
B.11 SOURce:CURRent? Query................................................................................................................... B-3
B.12 SOURce:CURRent:PROtection:LEVel Command ............................................................................... B-3
B.13 SOURce:CURRent:PROtection:LEVel? Query.................................................................................... B-3
B.14 SOURce:LIST:DTIMeCommand........................................................................................................... B-3
B.15 SOURce:LIST:DTIMe? Query ............................................................................................................... B-3
B.16 SOURce:LIST:RTIMeCommand........................................................................................................... B-4
B.17 SOURce:LIST:RTIMe? Query ............................................................................................................... B-4
B.18 SOURce:MEMory:CLS Command ........................................................................................................ B-4
B.19 SOURce:MEMory:CURRent:X Command............................................................................................ B-4
B.20 SOURce:MEMory:CURRent:X?Query ................................................................................................ B-4

iv KLN 750W 121912
TABLE OF CONTENTS
SECTION PAGE
B.21 SOURce:MEMory:LIST:X?Query ......................................................................................................... B-4
B.22 SOURce:MEMory:RECall:X Command ................................................................................................ B-4
B.23 SOURce:MEMory:VOLTage:X Command ............................................................................................ B-5
B.24 SOURce:MEMory:VOLTage:X?Query ................................................................................................. B-5
B.25 SOURce:VOLTage Command ............................................................................................................... B-5
B.26 SOURce:VOLTage? Query ................................................................................................................... B-5
B.27 SOURce:VOLTage:LIMit:LOW Command............................................................................................. B-5
B.28 SOURce:VOLTage:LIMit:LOW?Query ................................................................................................. B-5
B.29 SOURce:VOLTage:PROtection:LEVel Command................................................................................ B-6
B.30 SOURce:VOLTage:PROtection:LEVel? Query .................................................................................... B-6
B.31 SYSTem:BEEP Command ..................................................................................................................... B-6
B.32 SYST
em:BEEP?Query.......................................................................................................................... B-6
B.33 SYSTem:COMMunicate:LAN:DHCP Command ................................................................................... B-6
B.34 SYSTem:COMMunicate:LAN:DHCP?Query........................................................................................ B-6
B.35 SYST
em:COMMunicate:LAN:GATEway Command ............................................................................ B-7
B.36 SYSTem:COMMunicate:LAN:GATEway? Query................................................................................. B-7
B.37 SYSTem:COMMunicate:LAN:IP Command.......................................................................................... B-7
B.38 SYST
em:COMMunicate:LAN:IP?Query .............................................................................................. B-7
B.39 SYSTem:COMMunicate:LAN:IPADdress Command ........................................................................... B-7
B.40 SYSTem:COMMunicate:LAN:IPADdress? Query................................................................................ B-7
B.41 SYST
em:COMMunicate:LAN:MAC Command ..................................................................................... B-8
B.42 SYSTem:COMMunicate:LAN:MAC?Query.......................................................................................... B-8
B.43 SYSTem:COMMunicate:LAN:RESet Command .................................................................................. B-8
B.44 SYST
em:COMMunicate:LAN:SMAS Command ................................................................................... B-8
B.45 SYSTem:COMMunicate:LAN:SMAS?Query........................................................................................ B-8
B.46 SYSTem:COMMunicate:LAN:TELnet:PORT Command ...................................................................... B-8
B.47 SYST
em:COMMunicate:LAN:TELnet:PORT?Query........................................................................... B-9
B.48 SYSTem:ERRor? Query ........................................................................................................................ B-9
B.49 SYSTem:KLOCkCommand................................................................................................................... B-10
B.50 SYST
em:KLOCk? Query ....................................................................................................................... B-10
B.51 SYSTem:LOCal Command .................................................................................................................... B-10
B.52 SYSTem:REMote Command ................................................................................................................. B-10
B.53 SYST
em:VERSion? Query .................................................................................................................... B-11

LIST OF FIGURES
FIGURE TITLE PAGE
KLN 750W 121912 v
1-1 KLN 750W Power Supply, Automatic Crossover Characteristics ............................................................... 1-1
1-2 KLN 750W Power Supply, Outline Drawing (two units Mounted in Rack) .................................................. 1-6
2-1 KLN 750W Series Rear Panel .................................................................................................................... 2-1
2-2 RS-485 Port ................................................................................................................................................ 2-2
2-3 Programming Control Port .......................................................................................................................... 2-3
2-4 Mounting One KLN 750W Unit in 19-inch Rack .......................................................................................... 2-6
2-5 Load Connection Terminals for 6V - 150V Models ..................................................................................... 2-9
2-6 Load Connections, Local Sensing .............................................................................................................. 2-9
2-7 Load Wire Voltage Drop, Equivalent Schematic Diagram........................................................................... 2-10
2-8 Load Connections, Remote Sensing .......................................................................................................... 2-11
2-9 RS-485 Connections................................................................................................................................... 2-12
2-10 Series Connections Without Remote Sensing ............................................................................................ 2-13
2-11 Series Connections with Remote Sensing .................................................................................................. 2-13
2-12 Optional Series Connection Kit ................................................................................................................... 2-14
2-13 Parallel Connections Without Remote Sensing .......................................................................................... 2-14
2-14 Parallel Connections with Remote Sensing ................................................................................................ 2-15
2-15 Programming Control Port Connections for Parallel Operation .................................................................. 2-15
2-16 Optional Parallel Connector Board ............................................................................................................. 2-15
3-1 KLN 750W Series Front Panel.................................................................................................................... 3-1
3-2 7-Segment Display Characters ................................................................................................................... 3-3
3-3 Remote Control Using Programming Control Port and Optocoupler or Relay ............................................ 3-23
3-4 Programming Control Port Status Monitoring ............................................................................................. 3-25
3-5 Instrument Home page ............................................................................................................................... 3-28
3-6 IP Configuration .......................................................................................................................................... 3-29
3-7 Open HyperTerminal Connection ............................................................................................................... 3-29
3-8 Hyper terminal Properties ........................................................................................................................... 3-30
3-9 Hyper terminal ASCII Setup........................................................................................................................ 3-30
3-10 Tree Diagram of SCPI Commands Used with KLN 750W Power Supply ................................................... 3-33
4-1 Calibration Setup ........................................................................................................................................ 4-2

vi KLN 750W SVC 121912
LIST OF TABLES
TABLE TITLE PAGE
1-1 KLN 750 Watt Model Parameters ............................................................................................................... 1-2
1-2 KLN 750W General Specifications ............................................................................................................. 1-3
1-3 Equipment Supplied ................................................................................................................................... 1-9
1-4 Accessories ................................................................................................................................................ 1-9
1-5 Safety Symbols .......................................................................................................................................... 1-10
2-1 Rear Panel Connector Functions ............................................................................................................... 2-1
2-2 RS-485 Port Input/Output Pin Assignments ............................................................................................... 2-2
2-3 GPIB (IEEE 488) Port Input/Output Pin Assignments ................................................................................ 2-2
2-4 Programming Control Port I/O Pin Assignments ........................................................................................ 2-3
2-5 Maximum Load Wire Length for Voltage drop less than 1V ....................................................................... 2-10
3-1 Front Panel Controls and Indicators ........................................................................................................... 3-2
3-2 Factory Defaults ......................................................................................................................................... 3-4
3-3 Menu Functions .......................................................................................................................................... 3-6
3-4 IEEE 488 (GPIB) Bus Interface Functions ................................................................................................. 3-26
3-5 IEEE 488 (GPIB) Bus Command Mode Messages .................................................................................... 3-26
3-6 IEEE 488 (GPIB) Bus Data Mode Messages ............................................................................................. 3-27
A-1 IEEE 488.2 Command/query Index ............................................................................................................A-1
B-1 SCPI Subsystem Command/query Index ...................................................................................................B-1
B-2 Error Codes ................................................................................................................................................B-9

KLN 750W 121912 1-1
SECTION 1 - INTRODUCTION
1.1 SCOPE OF MANUAL
This manual contains instructions for the installation and operation of the KLN series of 750
Watt programmable, voltage and current stabilized d-c power supplies, hereafter referred to as
KLN 750W, from Kepco, Inc., Flushing, New York, U.S.A.
1.2 GENERAL DESCRIPTION
The KLN 750W power supply is a voltage and current stabilized d-c source with a sharp cross-
over between the constant voltage and constant current mode of operation. Eleven models are
offered, with rated d-c output voltage ranging from 6V to 600V and rated d-c output current rang-
ing from 1.25A to 100A (see Table 1-1).
KLN 750W switching power supplies operate from wide range 100-240V a-c, 50/60 Hz input
source power and employ active power factor correction (PFC). Since there are no internal
adjustments, KLN 750W Power Supplies offer excellent output voltage/current stability and easy
calibration.
Output voltage and current are displayed on independent LED displays. Control of the KLN
750W can be either local, via the front panel controls and displays, or remote, using 1) either
analog signals (applied to the Programming Control Port), or 2) digital programming. Digital pro-
gramming of standard models is via RS-485 communication bus. Optional IEEE 488.2 (GPIB)
and LAN interfaces are also available.
KLN 750W output and readback are high resolution: 16 bits D/A to set output voltage and cur-
rent, 24 bits A/D for readback of output voltage and current. These units feature a low tempera-
ture coefficient: Constant Voltage mode: 100ppm/°C, Constant Current mode: 300ppm/°C, and
built-in remote sensing with a maximum compensation of 5V.
The KLN 750W series is suitable for ATE automatic test, burn- in test and other applications that
require lots of testing power.
The KLN 750W power supply acts as a constant voltage source for comparatively large values
of load resistance, and as a constant current source for comparatively small values of load
resistance. The transition between these two modes of operation occurs automatically at a “crit-
ical” or “crossover” value of load resistance Rc = Es/Is, where Es is the voltage control setting
and Is is the current control setting (see Figure 1-1).
FIGURE 1-1. KLN 750W POWER SUPPLY, AUTOMATIC CROSSOVER CHARACTERISTICS

1-2 KLN 750W 121912
1.3 SPECIFICATIONS
Table 1-1 below indicates parameters that vary for different KLN 750W models; Table 1-2 lists
general specifications that apply to all KLN 750W models.
TABLE 1-1. KLN 750 WATT MODEL PARAMETERS
Model
(8)(9)(11)(12)
d-c Output Range Ripple(3) Line Regulation(5) Load Regulation(10) Response Time(7) Remote
Sense
Voltage
drop
(max.)
Constant
Voltage
(CV)(1)
Constant
Current
(CC)(2)
CV CC(4) CV CC CV(6) CC(6)
Full
Load
Up
Full
Load
Down
No
Load
Down
V d-c A d-c mV
rms
mA
rms
0.05%
mV
0.1%
mV
0.05%
mV
0.1%
mV Sec Sec Sec V
KLN 6-100 0 to 6 0 to 100 10 180 2.8 11 2.8 23 0.08 0.05 0.6 1
KLN 8-90 0 to 8 0 to 90 10 180 2.8 11 2.8 23 0.08 0.05 0.6 1
KLN 20-38 0 to 20 0 to 38 10 76 4 5.8 4 12.6 0.08 0.05 0.8 1
KLN 30-25 0 to 30 0 to 25 10 63 5 4.5 5 10 0.08 0.08 0.9 1.5
KLN 40-19 0 to 40 0 to 19 10 48 6 3.9 6 8.8 0.08 0.08 1 2
KLN 60-12.5 0 to 60 0 to 12.5 10 38 8 3.25 8 7.5 0.08 0.08 1.1 3
KLN 80-9.5 0 to 80 0 to 9.5 10 29 10 2.95 10 6.9 0.15 0.15 1.2 4
KLN 100-7.5 0 to 100 0 to 7.5 10 23 12 2.75 12 6.5 0.15 0.15 1.5 5
KLN 150-5 0 to 150 0 to 5 16 18 17 2.5 17 6 0.15 0.15 2 5
KLN 300-2.5 0 to 300 0 to 2.5 25 13 32 2.25 32 5.5 0.15 0.15 3 5
KLN 600-1.25 0 to 600 0 to 1.25 75 8 62 2.13 62 5.26 0.25 0.3 4 5
NOTES:
1. Actual output voltage should be ≤0.1% of rated voltage when output voltage is set to zero.
2. Actual output current should be ≤0.1% of the rated current when output current is set to zero (resistive load).
3. Measured when output is within 10%-100% of rated value; ripple bandwidth: 300kHz (rms), noise bandwidth: <20MHz (p-p).
4. For 6V model: measured when output voltage 2-6V and rated current; all other models measured when output 10-100% of rated voltage and rated
current.
5. Input voltage 100-240V a-c, 50/60Hz.
6. Constant input voltage and output from 10% of loading to full load.
7. With rated input, resistive load.
8. Rated power output with input 115V or 230V a-c
9. Specifications met after 30 minutes of operation, ambient temperature 23±5°C, humidity under 80% R. H, a-c input voltage ±5% of nominal, THD
≤2%, not using the remote compensation, not operating in series or parallel.
10. For example, the spec for KLN 6-100 line regulation and load regulation in CV mode is 0.05% + 2.8mV (or 6 x 0.0005 = ±3mV +2.8mV =5.8mV), so
line and load regulation are within 0.2mV to 5.8mV for the 6V model.
11. Add G suffix for models with optional GPIB interface, add E suffix for optional LAN interface.
12. Specifications subject to change without notice.

KLN 750W 121912 1-3
TABLE 1-2. KLN 750W GENERAL SPECIFICATIONS
SPECIFICATION RATING/DESCRIPTION
INPUT CHARACTERISTICS
Input voltage 100~240Vac, 50/60Hz
Input current (Full load) 115Vac - 8.1A; 230V a-c - 4.1A
Inrush current 230Vac - 12.5A
Power Factor (PF) 0.99 (at 115V a-c, rated output)
OUTPUT CHARACTERISTICS
Type of Stabilizer Constant Voltage (CV)/Constant Current (CC),
automatic crossover
Adjustment Range Voltage:
Current:
0 to 100% of rated voltage
0 to 100% of rated current
Protective functions Programmable overvoltage (OVP),
Programmable overcurrent (OCP),
Overtemperature (OTP),
Fuse blown
Protection setting range Overvoltage:
Overcurrent:
0% to 110% of rated voltage
10% to 110% of rated current
Remote Error Sense Compensation 5V max. (See Table 1-1.)
Parallel Operation Up to 5 units maximum, automatic load sharing
Series Operation 2 units maximum (total voltage must not exceed 600V)
Temperature. Coefficient Constant Voltage Mode,
Constant Current Mode:
100ppm/°C of rated output voltage or current, after 30 min-
ute warm-up
Temperature. Drift Constant Voltage Mode,
Constant Current Mode:
0.05% of rated output voltage or current over 8hrs interval
following 30 minutes warm-up. Constant line, load and tem-
perature.
Transient response time Constant Voltage mode: 20V and under: ≤1.5ms;
30V~100V: ≤1ms
150V~600V: ≤2ms
Efficiency 76% – 87%
Power Factor (PF) 0.99 (at 155/230 V a-c, rated output)
Isolation Voltage Input - Outputs:
Input - Ground:
Output - Ground (6V-150V)
Output - Ground (300V-600V)
2000V a-c: 1 minute
2000V a-c: 1 minute
500V d-c, leakage current: 100µA
1200V d-c, leakage current: 100µA
PROGRAMMING CHARACTERISTICS - LOCAL
Display resolution Voltage and Current: 4 digits (setting and display)
Display setting accuracy Voltage:
Current:
±0.1% ± 3C(1) at rated voltage
±0.5% ± 3C(1) at rated current
Display reading accuracy Voltage:
Current:
±0.2% ± 3C(1) at rated voltage
±0.5% ± 3C(1) at rated current
(1) C = 1 count of the last displayed digit.

1-4 KLN 750W 121912
PROGRAMMING CHARACTERISTICS - DIGITAL
Command setting resolution ±0.002% of full scale
Command reading resolution ±0.002% of full scale
Command and D/A
setting accuracy
Voltage:
Current:
±0.1% ± 3C(1) at rated voltage
±0.5% ± 3C(1) at rated current
Command and A/D
Measurement accuracy
Voltage:
Current:
±0.2% ± 2C(1) at rated voltage (Average Measurement)
±0.5% ± 3C(1) at rated current (Average Measurement)
Command response time ≤20ms (After received)(2)
RS-485 Digital Interface
(standard)
Max baud rate: 115,200
Max number of units
connected to bus:
254
Max. effective control distance: 1000 meters.
GPIB Digital Interface Optional
LAN Digital Interface Optional
PROGRAMMING CHARACTERISTICS - ANALOG
Analog setting accuracy
Constant Voltage mode (CV): Voltage:
Current:
± 5%
± 5%
Constant Current mode (CC): Voltage:
Current:
± 5%
± 5%
Analog monitor accuracy Rated voltage output: 10.00V ± 0.25V
Zero voltage output: 0.00V ± 0.25V
Rated current output: 10.00V ± 0.25V
Zero current output: 0.00V ± 0.25V
PHYSICAL CHARACTERISTICS
Weight Less than 11.2 lbs (5.1 Kg)
Dimensions W x H x D: 8.46" x 1.73" x 18.5" (215mm x 44mm x 470mm)
Source Power Connector IEC 320 inlet
Load Connections 6V to 100V models:
150V to 600V models:
± bus bars with protective cover
5-position Euroblock
Programming Control port 26-pin connector (mating connector supplied)
SER IN port 2-position Euroblock (mating connector supplied)
Sense port 3-position Euroblock (mating connector supplied)
RS-485 port 3-position Euroblock (mating connector supplied)
LAN port (optional) RJ 45 connector
GPIB port (optional) Standard IEEE 488.2 GPIB connector
(1) C = 1 count of the last displayed digit.
(2) Programming time = Command response time + Output response time. The output response time differs for different models,
from 30mS ~ 200mS
TABLE 1-2. KLN 750W GENERAL SPECIFICATIONS (CONTINUED)
SPECIFICATION RATING/DESCRIPTION

KLN 750W 121912 1-5
GENERAL (ENVIRONMENTAL) SPECIFICATIONS
Temperature Operating:
Storage:
0 to 50°C (indoor use)
-20 to 70°C
Humidity Operating:
Storage:
30%~90% RH (no condensation)
10%~90% RH (no condensation)
Altitude 3000m max
Cooling Speed-Controlled Fan
Noise <70 dB (A)
EMC Standard EN 61326-1:2006
EMC Emissions (EN 61326-1) Conducted Disturbance: EN 55011:2007 +A2:2007 Class B
Radiated Disturbance: EN 55011:2007 +A2:2007 Class B
Harmonic Distortion: EN 61000-3-2:2006 Class A
Voltage Fluctuations
and Flicker:
EN 61000-3-3:2008 Section 5
EMC Immunity (EN 61326-1) Electrostatic Discharge (ESD): EN 61000-4-2:2009 Class B
Radiated RF Magnetic Field: EN 61000-4-3:2006 + A1:2008 + A2:2010 Class A
Electrical Fast Transients and
Bursts:
EN 61000-4-4:2004 + A1:2010 Class B
Surge: EN 61000-4-5:2006 Class B
Conducted Disturbance
Induced by RF Fields:
EN 61000-4-6:2009, Class A
Voltage Dips and Short
Interruptions:
EN 61000-4-11:2004, Class C
NOTE:
All specifications apply after power on for 30 minutes, ambient temperature: 23±5°C, Humidity: under 80% RH, AC Voltage: ±5%,
Frequency: ±5%.
TABLE 1-2. KLN 750W GENERAL SPECIFICATIONS (CONTINUED)
SPECIFICATION RATING/DESCRIPTION

1-6 KLN 750W 121912
FIGURE 1-2. KLN 750W POWER SUPPLY, OUTLINE DRAWING (TWO UNITS MOUNTED IN RACK)
(SHEET 1 OF 2)

KLN 750W 121912 1-7
FIGURE 1-2. KLN 750W POWER SUPPLY, OUTLINE DRAWING (SHEET 2 OF 2)
1.4 LOCAL CONTROL
The front panel encoder can set and adjust output voltage and current under local control. The
display uses two 4-digit LED displays to provide a digital readout of output voltage and current.
1.5 REMOTE CONTROL
The KLN 750W Power Supply can be remotely controlled directly via the built-in RS-485 inter-
face using SCPI commands (see Appendix A and B). Most features available in local mode can
also be accessed remotely via the RS-485 (standard), and GPIB (optional) or LAN (optional)

1-8 KLN 750W 121912
digital interfaces. The transmission rate of RS-485 can be up to 115.2K bps. The RS-485 inter-
face can be used to connect multiple power supplies, up to a maximum of 254 units. The maxi-
mum effective control distance can be up to 1000m.
Digital remote control is also available via optional GPIB (suffix G) and LAN (suffix E) interfaces.
1.6 ANALOG CONTROL
External reference signals, provided through the Programming Control port (see Table 2-4), can
be used to control the output voltage and current of the KLN 750W. The Programming Control
port allows control of output on/off and permits emergency shutdown of the output. Output sig-
nals allow remote monitoring of whether the unit is powered on, output on/off, alarm condition,
output voltage and current, and operating mode: Constant Current (CC) or Constant Voltage
(CV). Refer to PAR. 3.5 for further details on using external signals to control and monitor the
output.
1.7 FEATURES
1.7.1 DIGITAL CALIBRATION
The KLN 750W Power Supply features high stability and long intervals between calibration. The
unit contains no user-required internal adjustments. Calibration is done by means of software
(see Section 4).
1.7.2 PROTECTION
The following protection is provided: OVP (Overvoltage protection), OCP (overcurrent protec-
tion), OTP, (overtemperature protection) and blown fuse.
1.7.3 SAVING AND RECALLING SETTINGS
The KLN 750W offers 16 memory locations accessible from the front panel that can be used to
store a set of operating parameters for later use. For each location, the user can store voltage
and current values. The stored settings can then be recalled to quickly program the unit to the
predetermined setting. Refer to PAR. 3.3.6 and 3.3.7 for further details.
1.7.4 PARALLEL AND SERIES CONFIGURATIONS
Identical KLN 750W units may be configured in series (up to two units including master) or par-
allel (up to five units including master) configurations. Parallel configurations provide for auto-
matic current sharing (see PAR. 2.8 for details).
1.7.5 MISCELLANEOUS FEATURES
• Both positive and negative output ramps can be independently programmed (see PAR’s.
3.3.10 and 3.3.11).
• Last setting is automatically restored upon power-up. Output can be programmed to be
either on or off upon power-up (see PAR’s. 3.3.9).
• One key recall of up to 16 memory locations storing voltage and current settings (see
PAR’s. 3.3.26 and 3.3.7).
• Variable speed fan reduces noise and extends fan life.
• Non-gap stacking; No ventilation holes at top or bottom.

KLN 750W 121912 1-9
1.8 EQUIPMENT SUPPLIED
Equipment supplied with the KLN 750W power supply is listed in Table 1-3.
1.9 ACCESSORIES
Accessories (not supplied) for the KLN 750W Power Supply are listed in Table 1-4.
TABLE 1-3. EQUIPMENT SUPPLIED
ITEM DESCRIPTION KEPCO PART
NUMBER
Power Cable, (125V/15A) Connects unit to 115V a-c source power. 118-1136
Sense wires: Red, black Used to connect output to local sensing
connections: red: (+) to +S, black: (–) to –S
N/A
RS-485 Mating connector Supplied installed on RS-485 port to allow access
to RS 485 interface.
542-0037
Programming Control Port
Mating connector
Supplied installed on Programming Control port to
allow access to pins for analog control and
monitoring.
143-0394
Sense Mating Connector Supplied installed on Sense connector to provide
access to sense connections used to compensate
for voltage drop on load connections
542-0035
SER IN mating connector Supplied installed on SER IN connector to allow
series connection of two units.
542-0036
L-type Brackets (2) with
mounting screws (4)
Used with optional rack mounting Kits RA 81-1 or
RA 81-2 to install one or two units in 19-inch rack.
N/A
Output Protective Cover Supplied with 6V through 100V models only; used
to cover output terminals
N/A
TABLE 1-4. ACCESSORIES
ITEM FUNCTION KEPCO
PART NUMBER
Rack Mount Kit Allows mounting of one half-rack KLN 750W unit in
standard 19-inch rack (L-type brackets supplied with
unit, not included in Kit).
RA 81-1
Rack Mount Kit Allows mounting of two half-rack KLN 750W units
side-by-side in standard 19-inch rack (L-type brackets
supplied with unit, not included in Kit).
RA 81-2
Parallel Socket Board Provides convenient connections for parallel
operation of up to five units
536-0129
Series Socket Board Provides convenient connections for series operation
of two units.
536-0130
Programming Port
Cable
Provides connections between two programming
ports for parallel and series operation.
518-0119

1-10 KLN 750W 121912
1.10 SAFETY
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 (see listing on Safety page A, preceding the
Table of Contents). Table 1-5 lists symbols used on the power supply or in this manual where
applicable.
TABLE 1-5. SAFETY SYMBOLS
SYMBOL Meaning
WARNING! RISK OF ELECTRIC SHOCK!
CAUTION: REFER TO REFERENCED PROCEDURE.
FRAME OR CHASIS TERMINAL
GROUND TERMINAL
PROTECTIVE GROUND CONDUCTOR TERMINAL
WARNING INDICATES THE POSSIBILITY OF BODILY INJURY
OR DEATH.
CAUTION INDICATES THE POSSIBILITY OF EQUIPMENT
DAMAGE.
!