Sorensen DCS600-2E, DCS100-12E, DCS50-24E, DCS20-60E, DCS600-1.7E User Manual
...
DCS-E 1kW Series &
DCS-E 1.2kW Series
DC Power Supplies
Operation Manual
This manual covers models:
DCS8-125E DCS33-33E DCS60-18E DCS150-7E
DCS8-140E DCS33-36E DCS60-20E DCS150-8E
DCS10-100E DCS40-25E DCS80-13E DCS300-3.5E
DCS10-120E DCS40-30E DCS80-15E DCS300-4E
DCS20-50E DCS50-20E DCS100-10E DCS600-1.7E
DCS20-60E DCS50-24E DCS100-12E DCS600-2E
SORENSEN
Elgar Electronics Corporation
9250 Brown Deer Road
San Diego, CA 92121-2294
1-800-733-5427
Tel: (858) 450-0085
Fax: (858) 458-0267
Email: sales@elgar.com
www.elgar.com
©2003 by Sorensen, Division of Elgar Electronics Corporation
This document contains information proprietary to Sorensen, Elgar Electronics Corporation. The information
contained herein is not to be duplicated or transferred in any manner without prior written permission from Sorensen.
July 21, 2003 Document No. M362500-01 Rev B
.
SAFETY NOTICE
Before applying power to the system, verify that the DCS Series unit is configured properly for the user’s
particular application.
WARNING!
HAZARDOUS VOLTAGES IN EXCESS OF 280 VRMS, 600V PEAK MAY BE
PRESENT WHEN COVERS ARE REMOVED. QUALIFIED PERSONNEL MUST
USE EXTREME CAUTION WHEN SERVICING THIS EQUIPMENT. CIRCUIT
BOARDS, TEST POINTS, AND OUTPUT VOLTAGES MAY BE FLOATING
ABOVE (BELOW) CHASSIS GROUND.
Installation and service must be performed by qualified personnel who are aware of dealing with attendant
hazards. This includes such simple tasks as fuse verification.
Ensure that the AC power line ground is connected properly to the DCS Series unit input connector
or chassis. Similarly, other power ground lines including those to application and maintenance
equipment must
Always ensure that facility AC input power is de-energized prior to connecting or disconnecting the
input/output power cables.
inadvertent contact with hazardous voltages is eliminated. To guard against risk of electrical shock during
open cover checks, do not touch
can retain an electrical charge. Use safety glasses during open cover checks to avoid personal injury by any
sudden failure of a component.
be grounded properly for both personnel and equipment safety.
During normal operation, the operator does not have access to hazardous voltages within
the chassis. However, depending on the user’s application configuration, HIGH VOLTAGES
HAZARDOUS TO HUMAN SAFETY may be generated normally on the output terminals.
Ensure that the output power lines are labeled properly as to the safety hazards and that any
any portion of the electrical circuits. Even when the power if off, capacitors
Due to filtering, the unit has high leakage current to the chassis. Therefore, it is essential to operate this unit
with a safety ground.
Some circuits are live even with the front panel switch turned off. Service, fuse verification, and
connection of wiring to the chassis must be accomplished at least five minutes
removed via external means; all circuits and/or terminals to be touched must be safety grounded to
the chassis.
After the unit has been operating for some time, the metal near the rear of the unit may be hot enough to
cause injury. Let the unit cool before handling.
Qualified service personnel need to be aware that some heat sinks are not at ground, but at high potential.
These operating instructions form an integral part of the equipment and must be available to the operating
personnel at all times. All the safety instructions and advice notes are to be followed.
Neither Sorensen, San Diego, California, USA, nor any of the subsidiary sales organizations can accept any
responsibility for personal, material or consequential injury, loss or damage that results from improper use of
the equipment and accessories.
after power has been
i
SAFETY SYMBOLS
ii
SORENSEN FIVE–YEAR WARRANTY
Sorensen, a division of Elgar Electronics Corporation, warrants its products to be free from defects in
material and workmanship. This warranty is effective for five years from the date of shipment of the product
to the original purchaser. Liability of Sorensen under this warranty shall exist provided that:
• the Buyer exposes the product to normal use and service and provides normal maintenance on the
product;
• Sorensen is promptly notified of defects by the Buyer and that notification occurs within the warranty period;
• the Buyer receives a Return Material Authorization (RMA) number from Sorensen’s Repair Department
prior to the return of the product to Sorensen for repair, phone 800-458-4258;
• the Buyer returns the defective product in the original, or equivalent, shipping container;
• if, upon examination of such product by Sorensen it is disclosed that, in fact, a defect in materials and/or
workmanship does exist, that the defect in the product was not caused by improper conditions, misuse,
or negligence; and,
• that Sorensen QA seal and nameplates have not been altered or removed and the equipment has not been
repaired or modified by anyone other than Sorensen authorized personnel.
This warranty is exclusive and in lieu of all other warranties, expressed or implied, including, but not limited
to, implied warranties of merchantability and fitness of the product to a particular purpose. Sorensen, its
agents, or representatives shall in no circumstance be liable for any direct, indirect, special, penal, or
consequential loss or damage of any nature resulting from the malfunction of the product. Remedies under
this warranty are expressly limited to repair or replacement of the product.
CONDITIONS OF WARRANTY
• To return a defective product, contact a Sorensen representative or the Sorensen factory for an RMA
number. Unauthorized returns will not be accepted and will be returned at the shipper’s expense.
• For Sorensen products found to be defective within thirty days of receipt by the original purchaser,
Sorensen will absorb all ground freight charges for the repair. Products found defective within the warranty
period, but beyond the initial thirty-day period, should be returned prepaid to Sorensen for repair. Sorensen
will repair the unit and return it by ground freight pre-paid.
• Normal warranty service is performed at Sorensen during the weekday hours of 7:30 am to 4:30 pm Pacific
time. Warranty repair work requested to be accomplished outside of normal working hours will be subject to
Sorensen non-warranty service rates.
• Warranty field service is available on an emergency basis. Travel expenses (travel time, per diem expense,
and related air fare) are the responsibility of the Buyer. A Buyer purchase order is required by Sorensen
prior to scheduling.
• A returned product found, upon inspection by Sorensen, to be in specification is subject to an inspection fee
and applicable freight charges.
• Equipment purchased in the United States carries only a United States warranty for which repair must be
accomplished at the Sorensen factory.
Committed to Quality...Striving for Excellence
iii
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iv
CONTENTS
SECTION 1 FEATURES AND SPECIFICATIONS ................................1-1
1.1 Description.......................................................................................................1-1
1.2 Operating Modes.............................................................................................1-1
1.3 Power Supply Features ...................................................................................1-1
1.4 Specifications...................................................................................................1-3
1.4.1 Electrical Specifications for 1kW Models.............................................1-3
1.4.2 Electrical Specifications for 1.2kW Models..........................................1-4
1.4.3 Physical Specifications........................................................................1-5
1.4.4 Mechanical Specifications ...................................................................1-6
SECTION 2 INSTALLATION AND OPERATION..................................2-1
2.1 General............................................................................................................2-1
2.2 Initial Inspection............................................................................................... 2-1
2.3 Installation........................................................................................................2-1
2.3.1 Input Voltage Selection........................................................................2-1
2.3.2 Input Line Impedance..........................................................................2-2
2.3.3 Ventilation Requirements.....................................................................2-2
2.3.4 Output Voltage Biasing........................................................................2-2
2.3.5 Rack Mounting.....................................................................................2-2
2.4 Controls, Connectors, and Indicators ..............................................................2-4
2.4.1 Front Panel..........................................................................................2-4
2.4.2 Rear Panel...........................................................................................2-4
2.4.3 J3 Program, Sense and Monitor Connector Description .....................2-5
Operation Manual v
Contents Sorensen DCS Series 1kW and 1.2kW Supplies
2.5 Initial Functional Tests .....................................................................................2-6
2.6 Standard Operation..........................................................................................2-7
2.6.1 Load Conductor Ratings ......................................................................2-7
2.6.2 Load Connection and Grounding.........................................................2-7
2.6.3 Inductive Loads....................................................................................2-8
2.6.4 Remote Sensing...................................................................................2-8
2.6.5 Negative Output Operation ..................................................................2-9
2.7 Single Supply Operation (Local Mode) ............................................................2-9
2.8 Multiple Supplies............................................................................................2-10
2.8.1 Series Operation................................................................................2-10
2.8.2 Parallel Operation ..............................................................................2-10
2.8.3 Split Supply Operation .......................................................................2-11
2.9 Over Voltage Protection (OVP)......................................................................2-11
2.9.1 Front Panel OVP Operation...............................................................2-11
2.9.2 Remote Programming of OVP With External Voltage Sources..........2-12
2.9.3 Remote Programming of OVP with an External Resistance.............. 2-13
2.9.4 Remote Programming of OVP with External Current Sources...........2-14
2.9.5 Remote OVP Sensing........................................................................2-15
2.10 Remote ON/OFF............................................................................................2-15
2.10.1 Remote ON/OFF by Contact Closure...............................................2-16
2.11 Remote Programming of Output Voltage and Current Limit ..........................2-16
2.11.1 Programming With External Voltage Sources..................................2-17
2.11.2 Programming With an External Resistance ..................................... 2-18
2.11.3 Programming With an External Current Source...............................2-19
2.12 Remote Monitoring and Status Indicators......................................................2-21
SECTION 3 THEORY OF OPERATION
3.1 Power Circuit (A2 Assembly) ...........................................................................3-1
3.1.1 Basic Off-Line Switching Regulator Theory .........................................3-1
3.1.2 Simplified Full Bridge Converter Theory ..............................................3-3
3.1.3 Detailed Circuit Description..................................................................3-3
3.2 Meter Circuit (A1 Assembly) ............................................................................3-9
3.2.1 Voltmeter............................................................................................3-10
3.2.2 Current Meter.....................................................................................3-10
vi Operation Manual
Sorensen DCS Series 1kW and 1.2kW Supplies Contents
SECTION 4 MAINTENANCE, TROUBLESHOOTING, AND CALIBRATION
4.1 General............................................................................................................4-1
4.2 Periodic Service...............................................................................................4-1
4.3 Troubleshooting............................................................................................... 4-1
4.3.1 Preliminary Checks..............................................................................4-2
4.3.2 Troubleshooting at the Operation Level...............................................4-2
4.4 Calibration........................................................................................................4-3
SECTION 5 PARTS LISTS
5.1 General............................................................................................................5-1
5.2 Parts Ordering .................................................................................................5-1
5.3 Parts Lists........................................................................................................ 5-2
SECTION 6 DRAWINGS AND SCHEMATICS
Operation Manual
vii
Contents Sorensen DCS Series 1kW and 1.2kW Supplies
LIST OF FIGURES
Figure 2-1 DCS Series Power Supply......................................................................... 2-3
Figure 3-1 Simplified Full Bridge Converter................................................................3-2
Figure 4-1 Trimpot Locations...................................................................................... 4-4
LIST OF TABLES
Table 2–1 Wire Size and Length................................................................................. 2-7
Table 4–1 Troubleshooting Guide............................................................................... 4-2
Table 5–1 DCS 1kW and 1.2kW Fuse Ratings........................................................... 5-2
Table 5–2 DCS 1kW Parts Lists by Model Number....................................................5-2
Table 5–3 DCS 1kW Parts Lists .................................................................................5-3
Table 5–4 DCS 1.2kW Parts Lists by Model Number.................................................5-4
Table 5–5 DCS 1.2kW Parts Lists ..............................................................................5-5
viii Operation Manual
SECTION 1
FEATURES AND SPECIFICATIONS
1.1 Description
DCS Series power supplies are 1000W and 1200W supplies designed to provide highly stable,
continuously variable output voltage and current for a broad range of development, system, and
burn-in applications. The DCS Series employs high frequency switching regulator technology to
achieve high power density and small package size.
The series consists of twelve 1000W models and twelve 1200W models. The model numbers
are designated by the DCS prefix, followed by the output voltage and current ratings. For
example, the model number DCS 60-18E indicates that the unit is rated at 0-60 Vdc and 0-18
Amps while a model DCS 20-50E is rated at 0-20 Vdc and 0-50 Amps.
1.2
Operating Modes
The DCS Series supply has two basic operating modes: Constant Voltage and Constant
Current. In constant voltage mode the output voltage is regulated at the selected value while
the output current varies with the load requirements. In constant current mode the output
current is regulated at the selected value while output the voltage varies with the load
requirements.
An automatic crossover system enables the unit to switch operating modes in response to
varying load requirements. If, for example, the unit is operating in voltage mode and the load
current attempts to increase above the setting of the current control, the unit will switch
automatically from voltage mode to current mode. If the load current is subsequently reduced
below the setting of the current control the unit will return to voltage mode automatically.
1.3
Power Supply Features
•
Twelve 1kW models with voltage ranges from 0-8 Vdc to 0-600 Vdc and current
outputs from 1.7A to 125A.
•
Twelve 1.2kW models with voltage ranges from 0-8 Vdc to 0-600 Vdc and current
outputs from 2A to 140A.
•
115/230 Vac selectable input voltage, 50-60 Hz single phase,
Installation Category II. For Indoor Use.
•
Simultaneous digital display of both voltage and current.
Operation Manual 1-1
Features and Specifications Sorensen DCS Series 1kW and 1.2kW Supplies
•
Automatic mode crossover into current or voltage mode.
•
Ten turn potentiometer voltage and current controls permit high resolution setting of
the output voltage and current from zero to the rated output.
•
Flexible output configuration: multiple units can be connected in parallel or series to
provide increased current or voltage.
•
High frequency switching technology allows high power density, providing increased
power output in a small, light package.
•
Remote sensing to compensate for losses in power leads.
•
Adjustable Over-Voltage Protection (OVP)
•
External TTL, AC or DC shutdown
•
Remote voltage, resistive, current limit and OVP programming with selectable
programming constants.
•
External indicator signals for remote monitoring of OVP status, local/remote
programming status, thermal shutdown, and output voltage and current.
•
Optional IEEE-488 interface for complete remote programming and readback
capability.
1-2 Operation Manual
Sorensen DCS Series 1kW and 1.2kW Supplies Features and Specifications
1.4 Specifications
1.4.1 Electrical Specifications for 1kW Models
Specifications are warranted over a temperature range of 0-50°C with default local sensing.
From temperatures of 50-70°C, derate output 2% per °C.
Models
Output Ratings:
Output Voltage
Output Current
Output Power
Line Regulation:1
Voltage
Current
Load Regulation:2
Voltage
Current
Meter Accuracy:
Voltage
Current
OVP Adjustment Range 0.4-8.8V 0.5-11V 1.0-22V 1.65-36.3V 2-44V 2.5-55V 3-66V 4-88V 5-110V 7.5-165V 15-330V 30-660V
Output Noise/Ripple(V)3
Rms
p-p
(20Hz-20MHz)
Stability:4
Voltage
Current
Temperature
Coefficient:
Voltage
Current
Maximum Remote
Sense Line Drop
Compensation/line
1
For input voltage variation over the AC input voltage range, with constant rated load
2
For 0-100% load variation, with constant nominal line voltage
3
Typical P-P noise and ripple
4
Maximum drift over 8 hours with constant line, load, and temperature, after 20-minute warm-up
5
Change in output per °C change in ambient temperature, with constant line and load
6
Line drop subtracts from the maximum available output voltage at full rated power
8-125 10-100 20-50 33-33 40-25 50-20 60-18 80-13 100-10 150-7 300-3.5 600-1.7
0-50V
0-20A
1000W
50 mV
20 mA
50 mV
20 mA
0.6V
0.30A
4 mV
60 mV
25 mV
10 mV
10 mV
6 mA
4V 4V 4V 4V 4V 4V
0-33V
0-33A
1089W
33 mV
33 mA
33 mV
33 mA
0.43V
0.43A
4 mV
60 mV
16.5 mV
16.5 mA
6.6 mV
9.9 mA
0-8V
0-125A
1000W
8 mV
125 mA
8 mV
125 mA
0.09V
1.35A
4 mV
60 mV
4 mV
62.5 mA
5
1.6 mV
37.5 mA
6
0-10V
0-100A
1000W
10 mV
100 mA
10 mV
100 mA
0.11V
1.1A
4 mV
60 mV
5 mV
50 mA
2 mV
30 mA
4V 4V 4V
0-20V
0-50A
1000W
20 mV
50 mA
20 mV
50 mA
0.3V
0.6A
4 mV
60 mV
10 mV
25 mA
4 mV
15 mA
4V
0-40V
0-25A
1000W
40 mV
25 mA
40 mV
25 mA
0.5V
0.35A
4 mV
60 mV
20 mV
12.5 mA
8 mV
7.5 mA
0-60V
0-18A
1080W
60 mV
18 mA
60 mV
18 mA
0.7V
0.28A
4 mV
60 mV
30 mV
9 mA
12 mV
5.4 mA
0-80V
0-13A
1040W
80 mV
13 mA
80 mV
13 mA
0.9V
0.23A
4 mV
60 mV
40 mV
6.5 mA
16 mV
3.9 mA
0-100V
0-10A
1000W
100 mV
10 mA
100 mV
10 mA
1.1V
0.11A
6 mV
60 mV
50 mV
5 mA
20 mV
3 mA
0-150V
0-7A
1050W
150 mV
7 mA
150 mV
7 mA
1.6V
0.08A
12 mV
160 mV
75 mV
3.5 mA
30 mV
2.1 mA
0-300V
0-3.5A
1050W
300 mV
3.5 mA
300 mV
3.5 mA
4.0V
0.045A
20 mV
200 mV
150 mV
1.75 mA
60 mV
1.05 mA
0-600V
0-1.7A
1020W
600 mV
1.7 mA
600mV
1.7 mA
7.0V
0.018A
TBD mV
TBD mV
300 mV
0.85 mA
4V 4V
120 mV
0.51 mA
AC Input: 200-250 Vac at 9A rms or 100-130 Vac at 18A rms, 47-63 Hz
Maximum Voltage Differential from output to safety ground: 150 Vdc
Operation Manual 1-3
Features and Specifications Sorensen DCS Series 1kW and 1.2kW Supplies
1.4.2 Electrical Specifications for 1.2kW Models
Specifications are warranted over a temperature range of 0-50°C with default local sensing.
From temperatures of 50-70°C, derate output 2% per °C.
Models
Output Ratings:
Output Voltage
Output Current
Output Power
Line Regulation:7
Voltage
Current
Load Regulation:8
Voltage
Current
Meter Accuracy:
Voltage
Current
OVP Adjustment Range 0.4-8.8V 0.5-11V 1.0-22V 1.65-36.3V 2-44V 2.5-55V 3-66V 4-88V 5-110V 7.5-165V 15-330V 30-660V
Output Noise/Ripple(V)
Rms
p-p
(20Hz-20MHz)
Stability:10
Voltage
Current
Temperature
Coefficient:
Voltage
Current
Maximum Remote
Sense Line Drop
Compensation/line
7
For input voltage variation over the AC input voltage range, with constant rated load
8
For 0-100% load variation, with constant nominal line voltage
9
Typical P-P noise and ripple
10
Maximum drift over 8 hours with constant line, load, and temperature, after 20-minute warm-up
11
Change in output per °C change in ambient temperature, with constant line and load
12
Line drop subtracts from the maximum available output voltage at full rated power
8-140 10-120 20-60 33-36 40-30 50-24 60-20 80-15 100-12 150-8 300-4 600-2
0-150V
0-8A
1200W
150 mV
8 mA
150 mV
8 mA
1.6V
0.09A
15 mV
160 mV
75 mV
4 mA
30 mV
2.4 mA
0-50V
0-24A
1200W
50 mV
24 mA
50 mV
24 mA
0.6V
0.34A
5 mV
60 mV
25 mV
12 mV
10 mV
7.2 mA
4V 4V 4V 4V 4V 4V
0-33V
0-36A
1200W
33 mV
36 mA
33 mV
36 mA
0.43V
0.46A
5 mV
60 mV
16.5 mV
18 mA
6.6 mV
10.8 mA
0-8V
0-140A
1200W
8 mV
140 mA
8 mV
140 mA
0.09V
1.55A
9
5 mV
60 mV
4 mV
70 mA
11
1.6 mV
42 mA
12
0-10V
0-120A
1200W
10 mV
120 mA
10 mV
120 mA
0.11V
1.3A
5 mV
60 mV
5 mV
60 mA
2 mV
36 mA
2V 2V 4V
0-20V
0-60A
1200W
20 mV
60 mA
20 mV
60 mA
0.3V
0.7A
5 mV
60 mV
10 mV
30 mA
4 mV
18 mA
4V
0-40V
0-30A
1200W
40 mV
30 mA
40 mV
30 mA
0.5V
0.40A
5 mV
60 mV
20 mV
15 mA
8 mV
9 mA
0-60V
0-20A
1200W
60 mV
20 mA
60 mV
20 mA
0.7V
0.3A
5 mV
60 mV
30 mV
10 mA
12 mV
6 mA
0-80V
0-15A
1200W
80 mV
15 mA
80 mV
15 mA
0.9V
0.25A
5 mV
60 mV
40 mV
7.5 mA
16 mV
4.5 mA
0-100V
0-12A
1200W
100 mV
12 mA
100 mV
12 mA
1.1V
0.13A
10 mV
60 mV
50 mV
6 mA
20 mV
3.6 mA
0-300V
0-4A
1200W
300 mV
4 mA
300 mV
4 mA
4.0V
0.05A
25 mV
200 mV
150 mV
2 mA
60 mV
1.2 mA
4V 4V
0-600V
0-2A
1020W
600 mV
2 mA
600 mV
2 mA
7.0V
0.021A
TBD mV
TBD mV
300 mV
1 mA
120 mV
0.6 mA
AC Input: 200-250 Vac at 10A rms or 100-130 Vac at 20A rms, 47-63 Hz
Maximum Voltage Differential from output to safety ground: 150 Vdc
1-4 Operation Manual
Sorensen DCS Series 1kW and 1.2kW Supplies Features and Specifications
1.4.3 Physical Specifications
Altitude: 2000M (6562 ft.)
Storage Temperature Range: -55 to +85°C
Humidity Range: 0 to 80% Non-condensing
Time Delay from power on until output stable: 3 seconds maximum
Voltage Mode Transient Response Time: 500µS recovery to 1% band for 30% step load
change from 70% to 100% or 100% to 70%
Remote Start/Stop and Interlock: TTL compatible input, Contact Closure, 12-250 Vac or
12-130 Vdc
Switching Frequency: Nominal 70 kHz typical (140 kHz output ripple)
Analog Programming Linearity: Typical error is less than 0.5% setting.
Maximum error is 1% of rated output.
Agency Approvals: CE Pollution Degree 2 (UL pending)
Remote Analog Programming (Full Scale Input)
Scales are selectable via an internally-mounted switch.
Parameter Resistance Voltage Current
Voltage
Current
OVP
5 kΩ
5 kΩ
5 kΩ
5V, 10V 1 mA
5V, 10V 1 mA
5V, 10V 1 mA
Operation Manual 1-5
Features and Specifications Sorensen DCS Series 1kW and 1.2kW Supplies
1.4.4 Mechanical Specifications
Size: 44mm H x 482.6mm W x 508mm D (1.75” H x 19” W x 20” D)
Weight: 8.2 kg (18 lbs)
Output Connector
Models DCS-E 8V through DCS 100V
Connector type: Nickel plated copper bus bars.
Approximate dimensions: 1.365" x 0.8" x 0.125"
Distance between positive and negative bus bar centers: 2.2"
Load wiring mounting holes: Two 0.257" diameter holes on 0.5" centers (1/4" hardware)
Models DCS-E 150V through DCS 600V
Connector type: Six–pin Amp Universal Mate-N-Lok connector
Chassis mounted parts: Housing: Amp part number 1-480705-0
Mating connector parts: Housing: Amp part number 1-480704-0
Note: Six Socket pins and one mating connector housing are supplied with each 150V through
600V unit.
Two 0.191" diameter holes on 0.4" centers (#10 hardware)
Pins: Amp part number 350547-1
Socket pins: Amp part number 350550-1
Input Connector
2 position terminal block plus safety ground screw.
Note: Input power cord not supplied.
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
1-6 Operation Manual
SECTION 2
INSTALLATION AND OPERATION
2.1 General
After unpacking, perform an initial inspection and function test to ensure that the unit is in good
working order. If the unit was damaged in shipment, notify the carrier immediately. Direct repair
problems to the Sorensen Customer Service Department at 1-800-458-4258.
2.2
The equipment should be inspected for damage as follows:
Initial Inspection
•
Inspect for obvious signs of physical damage.
•
Turn front panel controls from stop to stop. Rotation should be smooth.
•
Test the action of the power switch. Switching action should be positive.
•
If internal damage is suspected, remove the cover and check for printed circuit board
and/or component damage. Reinstall cover.
2.3 Installation
2.3.1
Before using the DCS power supply, the correct AC input voltage must be selected and an
appropriate line cord and plug attached, or hook up wire sized for input current based on NEC
or local electrical code. The frequency of the AC input voltage must be maintained between 47
and 63 Hz.
All units are shipped in a configuration requiring a 200-250 Vac input. The unit can be converted for use with a 100-130 Vac input or purchased preset for 115 Vac with the M1 Option.
For use with a 200-250 Vac input, connect a 250 Vac 10 Amp plug and cord to the rear panel
AC connector and the safety ground screw. (Note that the NEUT. and LINE designations above
the AC connector do not apply to 200-250V operation.)
Input Voltage Selection
CAUTION
Attempted operation of the DCS power supply with the incorrect input voltage may
result in internal damage to the unit.
Operation Manual 2-1
Installation and Operation Sorensen DCS Series 1kW and 1.2kW Supplies
To convert the unit for use with a 100-130 Vac input, perform the following steps:
1. Ensure that the unit is switched off and disconnected from any power source.
2. Remove the Phillips head screws that secure the cover and then remove the cover.
3. Remove the 230 Vac voltage selector jumper located at the front center of the PCB from
its mating header (P1 on the PCB) and install the attached 115 Vac jumper in its place.
4. Remove the adhesive backed 115 Vac 20A label from fan and cover the 230 Vac 10A
input specification above the rear panel AC connector.
5. Reinstall the cover and replace screws.
6. Install a 125 Vac 20A plug and cord ensuring that the neutral (white) wire and line
(black) wire are connected in the correct positions and that the safety ground wire is
connected to the ground screw.
Note that both the 1kW and 1.2kW models can exceed the 15A standard wall outplet
capacity at full load.
NOTE: To provide protection for personnel in the case of unit failure and to
ensure proper power supply operation, the safety ground wire of the AC input line
cord must always be connected to the ground screw provided.
2.3.2
The maximum input line impedance for operation at full rated output is 0.5 ohm. Higher source
impedances can be tolerated by raising the input line voltage or by reducing the output voltage
and/or current.
2.3.3
The DCS power supply may be used in rack mounted or benchtop applications. In either case
sufficient space must be allowed for cooling air to reach the ventilation inputs on each side of
the unit and for the fan exhaust air to exit from the rear of the unit.
2.3.4
Input Line Impedance
Ventilation Requirements
Output Voltage Biasing
WARNING
If the output voltage is to be biased relative to safety ground, the power
supply outputs may be biased up to a maximum of 150 Vdc with respect
to the chassis.
2.3.5 Rack Mounting
The DCS power supply is designed to fit in a standard 19" equipment rack. When installing the
unit in a rack, be sure to provide adequate support for the rear of the unit while not obstructing
the ventilation inlet on the sides of the unit. Use adjustable support angles such as Hammond
RASA22WH2, or a support bar such as Hammond RASB19WH2.
2-2 Operation Manual
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