KEPCO KLN 750W User Manual
OPERATOR’S MANUAL
KLN 750W
PROGRAMMABLE D-C POWER SUPPLY
1U HALF RACK
KEPCO INC.
An ISO 9001 Company.
POWER SUPPLY
ORDER NO.
IMPORTANT NOTES:
1) This manual is valid for the following Firmware Versions:
FIRMWARE VERSION NOTE.
1.60 and higher
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 numbers. Before using this Instruction Manual, check your equipment firmware version number to identify your model. If in doubt, contact your nearest Kepco Representative, or the
Kepco Documentation Office in New York, (718) 461-7000, 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.
MODEL
KLN 750W
©2014, KEPCO, INC
P/N 243-1339-r4a
KEPCO, INC. ! 131-38 SANFORD AVENUE ! FLUSHING, NY. 11355 U.S.A. ! TEL (718) 461-7000 ! FAX (718) 767-1102
email: hq@kepcopower.com ! World Wide Web: http://www.kepcopower.com
KEPCO®
THE POWER SUPPLIER™
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.
WARNING
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 applicable.
KLN 750W/ 032614 A
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
KLN 750W 032614 i
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..................................................................... 3-14
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 .......................................................................................................................... 3-15
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) ........................................................................... 3-16
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)........................................................... 3-17
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)........................................................................ 3-18
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................................................................................................................................................. 3-19
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 ............................................................................................................................... 3-20
3.4.2 Discontinuing Series Operation ........................................................................................................ 3-21
3.4.3 Parallel Operation ............................................................................................................................. 3-21
3.4.4 Discontinuing Parallel Operation....................................................................................................... 3-22
3.5 Analog Remote Mode Programming ...................................................................................................... 3-22
3.5.1 Remote Output On/off....................................................................................................................... 3-22
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............................................................... 3-23
3.5.5 Recalling Previously Stored Setting Using Programming Control Port ............................................. 3-23
3.5.6 Monitoring Output Status Using Programming Control Port ............................................................. 3-23
3.5.6.1 Monitor Output Voltage or Current.............................................................................................. 3-24
3.5.6.2 Monitor Unit Status...................................................................................................................... 3-24
ii KLN 750W 032614
TABLE OF CONTENTS
SECTION PAGE
3.6 Digital Remote Mode Programming ........................................................................................................ 3-24
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 .................................................................................................... 3-25
3.6.3 LAN Operation (If Option Installed).................................................................................................... 3-26
3.6.3.1 LAN Connection........................................................................................................................... 3-27
3.7 SCPI Programming ................................................................................................................................. 3-30
3.7.1 SCPI Messages ................................................................................................................................. 3-30
3.7.2 Common Commands/Queries ........................................................................................................... 3-30
3.7.3 SCPI Subsystem Command/query Structure .................................................................................... 3-30
3.7.3.1 Calibrate Subsystem.................................................................................................................... 3-30
3.7.3.2 Display Subsystem ...................................................................................................................... 3-31
3.7.3.3 Fetch Subsystem ......................................................................................................................... 3-31
3.7.3.4 Output Subsystem ....................................................................................................................... 3-31
3.7.3.5 Source Subsystem....................................................................................................................... 3-31
3.7.3.6 System Subsystem ...................................................................................................................... 3-31
3.7.4 Understanding The Command Structure ........................................................................................... 3-31
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:CONT
B.4 DISP:CONTrast? Query ........................................................................................................................ B-1
B.5 FETCh? Query ....................................................................................................................................... B-2
B.6 OUTP
B.7 OUTPut? Query ..................................................................................................................................... B-2
B.8 OUTP
B.9 OUTP
B.10 SOURce:CURRent Command .............................................................................................................. B-3
B.11 SOUR
B.12 SOUR
B.13 SOURce:CURRent:PROtection:LEVel? Query.................................................................................... B-3
B.14 SOUR
B.15 SOUR
B.16 SOUR
B.17 SOUR
B.18 SOURce:MEMory:CLS Command ........................................................................................................ B-4
B.19 SOUR
B.20 SOUR
rast Command.................................................................................................................... B-1
ut Command................................................................................................................................. B-2
ut:PON Command........................................................................................................................ B-2
ut:PON? Query............................................................................................................................. B-2
ce:CURRent? Query................................................................................................................... B-3
ce:CURRent:PROtection:LEVel Command ............................................................................... B-3
ce:LIST:DTIMe Command........................................................................................................... B-3
ce:LIST:DTIMe? Query ............................................................................................................... B-3
ce:LIST:RTIMe Command........................................................................................................... B-4
ce:LIST:RTIMe? Query ............................................................................................................... B-4
ce:MEMory:CURRent:X Command............................................................................................ B-4
ce:MEMory:CURRent:X? Query ................................................................................................ B-4
KLN 750W 032614 iii
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 SOUR
B.25 SOURce:VOLTage Command ............................................................................................................... B-5
B.26 SOURce:VOLTage? Query ................................................................................................................... B-5
B.27 SOUR
B.28 SOURce:VOLTage:LIMit:LOW? Query ................................................................................................. B-5
B.29 SOUR
B.30 SOURce:VOLTage:PROtection:LEVel? Query.................................................................................... B-6
B.31 SYSTem:BEEP Command ..................................................................................................................... B-6
B.32 SYST
B.33 SYSTem:COMMunicate:LAN:DHCP Command ................................................................................... B-6
B.34 SYSTem:COMMunicate:LAN:DHCP? Query........................................................................................ B-6
B.35 SYST
B.36 SYSTem:COMMunicate:LAN:GATEway? Query................................................................................. B-7
B.37 SYSTem:COMMunicate:LAN:IP Command.......................................................................................... B-7
B.38 SYST
B.39 SYSTem:COMMunicate:LAN:IPADdress Command........................................................................... B-7
B.40 SYSTem:COMMunicate:LAN:IPADdress? Query................................................................................ B-7
B.41 SYST
B.42 SYSTem:COMMunicate:LAN:MAC? Query.......................................................................................... B-8
B.43 SYSTem:COMMunicate:LAN:RESet Command .................................................................................. B-8
B.44 SYST
B.45 SYSTem:COMMunicate:LAN:SMAS? Query........................................................................................ B-8
B.46 SYSTem:COMMunicate:LAN:TELnet:PORT Command...................................................................... B-8
B.47 SYST
B.48 SYSTem:ERRor? Query ........................................................................................................................ B-9
B.49 SYSTem:KLOCk Command................................................................................................................... B-10
B.50 SYST
B.51 SYSTem:LOCal Command .................................................................................................................... B-10
B.52 SYSTem:REMote Command ................................................................................................................. B-10
B.53 SYST
ce:MEMory:VOLTage:X? Query ................................................................................................. B-5
ce:VOLTage:LIMit:LOW Command............................................................................................. B-5
ce:VOLTage:PROtection:LEVel Command................................................................................ B-6
em:BEEP? Query.......................................................................................................................... B-6
em:COMMunicate:LAN:GATEway Command ............................................................................ B-7
em:COMMunicate:LAN:IP? Query .............................................................................................. B-7
em:COMMunicate:LAN:MAC Command ..................................................................................... B-8
em:COMMunicate:LAN:SMAS Command ................................................................................... B-8
em:COMMunicate:LAN:TELnet:PORT? Query........................................................................... B-9
em:KLOCk? Query ....................................................................................................................... B-10
em:VERSion? Query .................................................................................................................... B-11
iv KLN 750W 032614
LIST OF FIGURES
FIGURE TITLE PAGE
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 ............................................................................................. 3-24
3-5 Instrument Home page ............................................................................................................................... 3-27
3-6 IP Configuration .......................................................................................................................................... 3-28
3-7 Open HyperTerminal Connection ............................................................................................................... 3-28
3-8 Hyper terminal Properties ........................................................................................................................... 3-29
3-9 Hyper terminal ASCII Setup........................................................................................................................ 3-29
3-10 Tree Diagram of SCPI Commands Used with KLN 750W Power Supply ................................................... 3-32
4-1 Calibration Setup ........................................................................................................................................ 4-2
KLN 750W 032614
v
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 ................................................................................................. 3-25
3-5 IEEE 488 (GPIB) Bus Command Mode Messages .................................................................................... 3-26
3-6 IEEE 488 (GPIB) Bus Data Mode Messages ............................................................................................. 3-26
3-7 VISA Resource String Corresponding to Interface ..................................................................................... 3-30
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
vi KLN 750W SVC 032614
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 crossover 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 ranging 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 programming of standard models is via RS-485 communication bus. Optional IEEE 488.2 (GPIB)
and LAN interfaces are also available.
SECTION 1 - INTRODUCTION
KLN 750W output and readback are high resolution: 16 bits D/A to set output voltage and current, 24 bits A/D for readback of output voltage and current. These units feature a low temperature 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 “critical” 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
KLN 750W 032614 1-1
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
d-c Output Range
Constant
Model
(8)(9)(11)(12)
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
2. Actual output current should be
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.
Vol tag e
(CV)
V d-c A d-c
Constant
Current
(1)
(CC)
(2)
≤0.1% of rated voltage when output voltage is set to zero.
≤0.1% of the rated current when output current is set to zero (resistive load).
Ripple
CV
mV
rms
(3)
Line Regulation
(4)
CC
mA
rms
CV CC
0.05%mV0.1%mV0.05%mV0.1%
(5)
Load Regulation
(6)
CV
CC
mV
(10)
Response Time
Full
(6)
Full
Load
Load
Up
Down
Sec Sec Sec V
(7)
No
Load
Down
Remote
Sense
Voltage
drop
(max.)
1-2 KLN 750W 032614
TABLE 1-2. KLN 750W GENERAL SPECIFICATIONS
SPECIFICATION RATING/DESCRIPTION
INPUT CHARACTERISTICS
Input voltage 100~240Vac, 50/60Hz
127~373V d-c
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)
(1)
OUTPUT CHARACTERISTICS
Type of Stabilizer Constant Voltage (CV)/Constant Current (CC),
Adjustment Range Voltage:
Current:
Protective functions Programmable overvoltage (OVP),
Protection setting range Overvoltage:
Overcurrent:
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:
automatic crossover
0 to 100% of rated voltage
0 to 100% of rated current
Programmable overcurrent (OCP),
Overtemperature (OTP),
Fuse blown
0% to 110% of rated voltage
10% to 110% of rated current
100ppm/°C of rated output voltage or current, after 30 minute warm-up
Temperature. Drift Constant Voltage Mode,
Constant Current Mode:
Transient response time Constant Voltage mode: 20V and under:
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)
0.05% of rated output voltage or current over 8hrs interval
following 30 minutes warm-up. Constant line, load and temperature.
≤1.5ms;
30V~100V:
150V~600V:
2000V a-c: 1 minute
2000V a-c: 1 minute
500V d-c, leakage current: 100
1200V d-c, leakage current: 100
≤1ms
≤2ms
µA
µA
PROGRAMMING CHARACTERISTICS - LOCAL
Display resolution Voltage and Current: 4 digits (setting and display)
Display setting accuracy Voltage:
Current:
Display reading accuracy Voltage:
Current:
(1) Connect (+) to L and (–) to N. Safety agency approvals apply to a-c input operation only.
(2) C = 1 count of the last displayed digit.
±0.1% ± 3C
±0.5% ± 3C
±0.2% ± 3C
±0.5% ± 3C
(2)
at rated voltage
(2)
at rated current
(2)
at rated voltage
(2)
at rated current
KLN 750W 032614 1-3
TABLE 1-2. KLN 750W GENERAL SPECIFICATIONS (CONTINUED)
SPECIFICATION RATING/DESCRIPTION
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
Command and A/D
Measurement accuracy
Command response time
Voltage:
Current:
Voltage:
Current:
±0.1% ± 3C
±0.5% ± 3C
±0.2% ± 2C
±0.5% ± 3C
≤20ms (After received)
(1)
at rated voltage
(1)
at rated current
(1)
at rated voltage (Average Measurement)
(1)
at rated current (Average Measurement)
(2)
RS-485 Digital Interface
(standard)
Max. effective control distance: 1000 meters.
GPIB Digital Interface Optional
LAN Digital Interface Optional
Max baud rate: 115,200
Max number of units
connected to bus:
254
PROGRAMMING CHARACTERISTICS - ANALOG
Analog setting accuracy
Constant Voltage mode (CV): Voltage:
Current:
Constant Current mode (CC): Voltage:
Current:
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
± 5%
± 5%
± 5%
± 5%
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:
Programming Control port 26-pin connector
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
± bus bars with protective cover
5-position Euroblock
1-4 KLN 750W 032614
TABLE 1-2. KLN 750W GENERAL SPECIFICATIONS (CONTINUED)
SPECIFICATION RATING/DESCRIPTION
GENERAL (ENVIRONMENTAL) SPECIFICATIONS
Temperature Operating:
Storage:
Humidity Operating:
Storage:
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:
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:
Surge: EN 61000-4-5:2006 Class B
Conducted Disturbance
Induced by RF Fields:
0 to 50°C (indoor use)
-20 to 70°C
30%~90% RH (no condensation)
10%~90% RH (no condensation)
EN 61000-3-3:2008 Section 5
EN 61000-4-4:2004 + A1:2010 Class B
EN 61000-4-6:2009, Class A
Voltage Dips and Short
Interruptions:
NOTE:
All specifications apply after power on for 30 minutes, ambient temperature: 23±5°C, Humidity: under 80% RH, AC Voltage: ±5%,
Frequency: ±5%.
EN 61000-4-11:2004, Class C
KLN 750W 032614 1-5
FIGURE 1-2. KLN 750W POWER SUPPLY, OUTLINE DRAWING (TWO UNITS MOUNTED IN RACK)
(SHEET 1 OF 2)
1-6 KLN 750W 032614
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 interface 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)
KLN 750W 032614 1-7
digital interfaces. The transmission rate of RS-485 can be up to 115.2K bps. The RS-485 interface can be used to connect multiple power supplies, up to a maximum of 254 units. The maximum 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 signals 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 protection), 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 parallel (up to five units including master) configurations. Parallel configurations provide for automatic 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.
1-8 KLN 750W 032614
1.8 EQUIPMENT SUPPLIED
Equipment supplied with the KLN 750W power supply is listed in Table 1-3.
TABLE 1-3. EQUIPMENT SUPPLIED
ITEM DESCRIPTION
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
RS-485 Mating connector Supplied installed on RS-485 port to allow access
Programming Control Port
Mating connector
Sense Mating Connector Supplied installed on Sense connector to provide
SER IN mating connector Supplied installed on SER IN connector to allow
L-type Brackets (2) with
mounting screws (4)
Output Protective Cover Supplied with 6V through 100V models only; used
connections: red: (+) to +S, black: (–) to –S
to RS 485 interface.
Supplied installed on Programming Control port to
allow access to pins for analog control and
monitoring.
access to sense connections used to compensate
for voltage drop on load connections
series connection of two units.
Used with optional rack mounting Kits RA 81-1 or
RA 81-2 to install one or two units in 19-inch rack.
to cover output terminals
KEPCO PART
NUMBER
N/A
542-0037
143-0394
542-0035
542-0036
N/A
N/A
1.9 ACCESSORIES
Accessories (not supplied) for the KLN 750W Power Supply are listed in Table 1-4.
TABLE 1-4. ACCESSORIES
ITEM FUNCTION
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).
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).
Parallel Socket Board Provides convenient connections for parallel
Series Socket Board Provides convenient connections for series operation
Programming Port
Cable
operation of up to five units
of two units.
Provides connections between two programming
ports for parallel and series operation.
KEPCO
PART NUMBER
RA 81-1
RA 81-2
536-0129
536-0130
518-0119
KLN 750W 032614 1-9
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
CAUTION
INDICATES THE POSSIBILITY OF BODILY INJURY
OR DEATH.
INDICATES THE POSSIBILITY OF EQUIPMENT
DAMAGE.
1-10 KLN 750W 032614
SECTION 2 - INSTALLATION
2.1 UNPACKING AND INSPECTION
This instrument has been thoroughly inspected and tested prior to packing and is ready for
operation. After careful unpacking, inspect for shipping damage before attempting to operate.
Perform the preliminary operational check as outlined in PAR. 2.3. If any indication of damage is
found, file an immediate claim with the responsible transport service.
2.2 TERMINATIONS AND CONTROLS
a) Front Panel: Refer to Figure 3-1 and Table 3-1.
b) Rear Panel: Refer to Figure 2-1 and Table 2-1.
FIGURE 2-1. KLN 750W SERIES REAR PANEL
TABLE 2-1. REAR PANEL CONNECTOR FUNCTIONS
NUMBER
(FIGURE 2-1)
1
2
3 Programming Control Port
4 SER IN
5 +S, –S Remote sensing voltage compensation.
6 DC Output Allows connection to load.
7 AC input Allows connection to mains supply using power cord supplied.
CONNECTOR/TERMINAL FUNCTION
RS-485
3-pin pluggable terminal
block
Optional:
either 24-pin GPIB
connector (shown)
or LAN ethernet connector
(not shown)
Allows connection to RS-485 bus. See Table 2-2 for details.
Allows connection to GPIB bus or LAN (optional) when installed. See Table 2-3 for
GPIB connector details.
Allows access to analog input/output signals that allow monitoring and control of the
power supply by analog means. See Table 2-4 for pin assignments.
Provides output voltage reference from master to slave to ensure voltage slave
matches the master when two units connected in series.
KLN 750W 032614 2-1
TABLE 2-2. RS-485 PORT INPUT/OUTPUT PIN ASSIGNMENTS
PIN
(FIGURE 2-2)
G Ground Reduce external interference
+ +RX Connect to +TX of computer and/or +RX of next unit on RS-485 bus (see Figure 2-9).
– –RX Connect to –TX of computer and/or –RX of next unit on RS-485 bus (see Figure 2-9).
NOTE: Connect 120 Ohm termination resistor across + and – of last unit connected to RS-485 bus (furthest from computer)
See PAR. 2.7.2.
SIGNAL NAME FUNCTION
FIGURE 2-2. RS-485 PORT
TABLE 2-3. GPIB (IEEE 488) PORT INPUT/OUTPUT PIN ASSIGNMENTS
PIN SIGNAL NAME FUNCTION
1DI01 I/O Line
2D
3D
4D
5 EOI End or Identify
6 D AV Da ta Vali d
7 NRFD Not Ready for Data
8 NDAC Not Data Accepted
9 IFC Interface Clear
10 SRQ Service Request
11 ATN Attention
12 SHIELD Shield
13 D
14 D
15 D
16 D
17 REN Remote Enable
18 GND Ground (signal common)
19 GND Ground (signal common)
20 GND Ground (signal common)
21 GND Ground (signal common)
22 GND Ground (signal common)
23 GND Ground (signal common)
24 LOGIC GND Logic Ground
I02 I/O Line
I03 I/O Line
I04 I/O Line
I05 I/O Line
I06 I/O Line
I07 I/O Line
I08 I/O Line
2-2 KLN 750W 032614
TABLE 2-4. PROGRAMMING CONTROL PORT I/O PIN ASSIGNMENTS
PIN
(FIGURE 2-3)
1, 2 RECALL External recall control (dry contact). Same function as RCL key on front panel.
3, 4, 5, 6 --- Not used
7 Power on/off status Output signal. Active (low between pin 7 and pin 8) to indicate unit is turned on.
8 Status common Common for Status signal pins 7, 9, 10, 11 and 12
9 Alarm status
10 On/off status
11 CC status
12 CV status
13 EXT 5V input+ Input signal. Used to supply +5V for the relay providing remote output on/off function.
14 EXT V input common Common for Pin 13 (remote output on/off function).
15 PRL IN+
16 EXT CV
17 PRL OUT+
18 EXT CC
19 PRL IN–/OUT– V common for pins 15 and 17.
20 V Monitor Output signal. Zero to 10V d-c corresponds to zero to full scale voltage,
21 ON/OFF Control Input Signal. Used to power unit on (short) or off (open). Dry contact.
22 A Monitor Output signal. Zero to 10V d-c corresponds to zero to full scale current.
23 Shutdown
24, 26 Analog Common Analog signal control ground, connected to pin 19.
25 Digital Common Digital signal control ground.
(1) Open collector output: maximum voltage 30V, maximum current 8mA; Low: <0.4V.
SIGNAL NAME FUNCTION
Output signal. Active (low between pin 9 and pin 8) to indicate whether alarm (OVP or
OCP trips or shutdown signal applied to pin 23) has occurred. (open collector via optocoupler).
Output signal. Active (low between pin 10 and pin 8) to indicate output is on (open collector by optocoupler).
Output signal. Active (low between pin 11 and pin 8) to indicate unit is in constant current mode (open collector by optocoupler).
Output signal. Active (low between pin 12 and pin 8) to indicate unit is in constant voltage mode (open collector by optocoupler).
(1)
(1)
(See PAR. 3.3.25 to enable.)
(1)
(1)
Input signal. For units operating in parallel, used for signal input into MASTER of current sharing between MASTER and SLAVE(s) (see PAR. 2.8.2.1).
Input signal. External voltage to control output voltage of unit. 0 to 10V d-c corresponds to zero to full scale output voltage (see PAR. 3.3.26 to enable).
Output signal. For units operating in parallel, used for signal output of current sharing
from SLAVE to MASTER (see PAR. 2.8.2.1).
Input signal. External voltage to control output current of unit. 0 to 10V d-c corresponds to zero to full scale output current (see PAR. 3.3.27 to enable).
Short between pin 23 and analog ground (pins 24 or 26) causes emergency shutdown
of unit.
(1)
(1)
FIGURE 2-3. PROGRAMMING CONTROL PORT
KLN 750W 032614 2-3
2.3 PRELIMINARY OPERATIONAL CHECK
A simple operational check after unpacking and before equipment installation is advisable to
ascertain whether the power supply has suffered damage resulting from shipping.
Refer to Figures 2-1 and 3-1 for location of operating controls and electrical connections. Tables
3-1 and 3-2 explain the functions of operating controls/indicators and keypad keys, respectively.
Refer to PAR. 3.2 for a description of basic operating techniques.
1. With power supply disconnected from source power verify that sense connections are correct: +S is connected to +POS and –S is connected to –NEG (see PAR. 2-6).
2. With front panel power circuit breaker to OFF position, connect the power supply to source
power (see PAR. 2.5.2).
3. With no load connected, set power circuit breaker to ON. Each time the unit is turned on it
beeps and an internal self-test is performed (see PAR 3.2.1). After the test has been successfully completed, the 4-digit Voltage Display and Current Display show the last programmed voltage and current values, respectively, in Volts and Amperes.
4. Press SHIFT/LOCAL key. Verify blue LED goes on. Press V/OVP key: Least significant
digit of Voltage Display and integral red OVP LED at the right of the display blink. Verify
blue LED goes off.
5. Rotate encoder to change the digits for adjustment. Turn clockwise to increase the value,
counterclockwise to decrease the value. Tap encoder to move to the next digit. Continue until
the maximum OVP value is displayed (e.g., 33.00 for 30V model).
6. Press ENTER key to accept programmed OVP value.
7. Press SHIFT/LOCAL key. Verify blue LED goes on. Press A/OCP. Least significant digit
of Current Display and integral red OCP LED at the right of the display blink. Verify
blue LED goes off.
8. Rotate encoder to change the digits for adjustment. Turn clockwise to increase the value,
counterclockwise to decrease the value. Tap encoder to move to the next digit. Continue until
the maximum OCP value is displayed (e.g., 26.25 for 25 Ampere model).
9. Press ENTER key to accept programmed OCP value.
10.Press V/OVP key. Least significant digit of Voltage Display blinks.
11. Rotate encoder to change the digits for adjustment. Turn clockwise to increase the value,
counterclockwise to decrease the value. Tap encoder to move to the next digit. Continue until
the rated output voltage value (e.g., 30.00 for 30V model) is displayed.
12.Press ENTER key to accept programmed voltage value.
13.Press A/OCP key. Least significant digit of Current Display blinks.
14.Rotate encoder to change the digits for adjustment. Turn clockwise to increase the value,
counterclockwise to decrease the value. Tap encoder to move to the next digit. Continue until
a value of several Amperes of output current is displayed.
2-4 KLN 750W 032614
15.Connect a digital voltmeter (DVM) to the (+S) and (-S) terminals on the rear panel. Verify that
DVM shows there is no output voltage from the power supply.
16.Press red OUT key. Verify that red LED at left of OUT key goes on.
17.Compare the programmed output voltage value (e.g., 30.00V for 30V model per step 11) with
the voltage reading of the DVM; Verify that the difference between the two does not exceed
±0.1% ± 3C
(*)
.
18.Compare the voltage reading of Voltage Display with that of the DVM; Verify that the difference between the two does not exceed ±0.2% ± 3C
19.Disable the output by pressing the OUT key; verify front panel Voltage and Current displays
show programmed values of Voltage and Current, respectively and DVM reads 0V.
20.Set power switch to OFF. The unit issues a long beep as it powers down. Disconnect unit
from source power, then disconnect test equipment.
(*) C = 1 count of the last displayed digit.
2.4 INSTALLATION
2.4.1 RACK MOUNTING
One or two (side by side) KLN 750W units can be mounted in a standard 19-inch rack. The units
are 1U high and do not require any gaps between equipment above and below. Airflow is front
to back only. Use the RA 81-1 Mounting Kit (see Table 1-4) to mount a single unit. Use Mounting
Kit RA 81-2 (optional, see Table 1-4) to mount two half-rack units side by side in a 19-inch rack.
2.4.1.1 MOUNTING ONE 1/2-RACK UNIT IN 19-INCH RACK
1. On one side of the unit, mount one L-type bracket with knob (supplied with unit) to the unit
using two screws supplied with unit.
(*)
.
2. Mount the U-type bracket supplied in the Kit to the other side of the unit using two screws
supplied in Kit.
3. Mount the other L-type bracket with knob (supplied with unit) to the end of the U-type bracket
using two screws supplied with unit. The knobs can now be used to support the assembled
unit while installing in a 19-inch rack.
KLN 750W 032614 2-5
FIGURE 2-4. MOUNTING ONE KLN 750W UNIT IN 19-INCH RACK
2.4.1.2 MOUNTING TWO 1/2-RACK UNITS IN 19-INCH RACK
To mount two KLN 750W units side-by-side in a 19 inch rack, use the RA 81-2 mounting kit (not
supplied, see Accessories, Table 1-4).
1. Place the two units side by side as they would be installed in the rack. On the outer side of
each unit (not facing the other unit), mount one L-type bracket with knob (supplied with unit)
to each unit using two screws supplied with unit for each (see Figure 1-2).
2. Separate the two units. Install two shoulder screws, flat washers and lockwashers (supplied
with Kit) at two locations on one unit (two threaded holes, A, Figure 1-2).
3. Move the two units together and insert the shoulder screws into the keyhole-shaped opening
in the other unit (two holes, B, Figure 1-2). Then slide the unit with the shoulder screws forward until the front panels of both units are flush.
4. Connect the two units at the rear using linking bracket (see Figure 1-2, sheet 2) and two
screws supplied with Kit. The two units can now be handled as an assembly and can be
installed directly into a 19-inch rack.
2.5 WIRING INSTRUCTIONS
Interconnections between an a-c power source and a power supply, and between the power
supply and its load are as critical as the interface between other types of electronic equipment.
If optimum performance is expected, certain rules for the interconnection of source, power supply and load must be observed by the user. These rules are described in detail in the following
paragraphs.
2-6 KLN 750W 032614
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