Sorensen DCS Series Programmable DC Power Supplies: DCS50-20EM9C

Technical Dossier

Product Details And Specifications

Sorensen DCS Series: Comprehensive Module Range and Technical Overview

The Sorensen DCS series represents one of the most widely deployed families of programmable DC power supplies in global heavy industry. Installed across petrochemical refineries, nuclear power facilities, semiconductor fabrication plants, and aerospace test laboratories, the DCS platform has established a benchmark for precision voltage and current regulation in demanding continuous-duty environments. Its modular architecture, wide output range, and compatibility with both analog and digital control interfaces have made it a default specification in industrial test and process power applications worldwide.

The Evolution of DCS Architecture

The Sorensen DCS series was introduced as a successor to earlier fixed-output bench supplies, incorporating programmable output control via front-panel potentiometers and rear-panel analog inputs (0–5 V or 0–10 V). Early production units used linear regulation topologies, prioritizing low output ripple and noise — critical for sensitive instrumentation loads. As industrial automation advanced, the DCS line was extended with the EM (enhanced memory) and M9C (9-pin D-sub remote control) suffix variants, enabling integration with GPIB, RS-232, and later Ethernet-based control systems.

Compatibility across DCS generations is maintained through a standardized rear-panel interface: a 9-pin D-sub connector for remote voltage/current programming, enable/disable control, and fault monitoring. This backward compatibility has allowed facilities to upgrade control infrastructure without replacing installed power supply hardware — a key factor in the series' longevity in maintenance-intensive industries. Units manufactured from the mid-1990s through current production share the same rack footprint (3U, 19-inch) and output terminal configuration, simplifying spare parts management.

Sorensen DCS Full Catalog & Functionalities (SKU List)

The DCS series spans output voltages from 8 V to 600 V and output currents from 1.7 A to 125 A. The following SKUs represent the core catalog, organized by output power class:

Low-Voltage / High-Current Models (≤20 V output)

• DCS8-125E: 8 V / 125 A programmable DC supply; high-current electroplating and electrolysis applications.
• DCS10-100E: 10 V / 100 A output; battery formation and charge/discharge cycling test systems.
• DCS16-62E: 16 V / 62 A; motor winding test and low-voltage bus simulation.
• DCS20-50E: 20 V / 50 A; general-purpose industrial bench and rack supply for process control.
• DCS20-50EM: 20 V / 50 A with enhanced memory programming; stores up to 10 output presets.

Mid-Range Models (33 V – 60 V output)

• DCS33-33E: 33 V / 33 A; telecommunications equipment burn-in and 48 V bus testing.
• DCS40-25E: 40 V / 25 A; servo drive and actuator functional test.
• DCS40-25EM: 40 V / 25 A with memory presets; automated test sequence integration.
• DCS50-20E: 50 V / 20 A; standard variant for industrial process and R&D laboratory use.
• DCS50-20EM9C: 50 V / 20 A with memory presets and 9-pin D-sub remote interface; full analog programmability for ATE integration.
• DCS55-55E: 55 V / 55 A; high-power mid-voltage supply for traction and drive system simulation.
• DCS60-18E: 60 V / 18 A; photovoltaic array simulation and battery pack testing.

High-Voltage Models (80 V – 600 V output)

• DCS80-13E: 80 V / 13 A; DC bus replication for variable frequency drive testing.
• DCS80-13EM9C: 80 V / 13 A with memory and remote interface; ATE rack integration.
• DCS100-10E: 100 V / 10 A; insulation resistance and dielectric withstand pre-test conditioning.
• DCS150-7E: 150 V / 7 A; high-voltage component characterization and burn-in.
• DCS300-3.5E: 300 V / 3.5 A; capacitor formation and high-voltage subsystem test.
• DCS600-1.7E: 600 V / 1.7 A; maximum-voltage variant for power electronics research and HV cable testing.

Sourcing Hard-to-Find & Obsolete DCS Series Parts

Several DCS variants — particularly early E-suffix single-range units and EM-suffix memory models — have reached end-of-manufacture status. Sorensen (now part of AMETEK Programmable Power) no longer produces replacement PCB assemblies or front-panel control boards for pre-2005 production units. DriveKNMS maintains a dedicated inventory of tested surplus and refurbished DCS modules, including output filter capacitor assemblies, SCR trigger boards, and reference regulator cards, to support lifecycle extension for installed base equipment.

For facilities operating DCS supplies in safety-critical or continuous-process environments where unplanned downtime is unacceptable, DriveKNMS provides advance exchange units — a tested replacement ships before the failed unit is returned — minimizing process interruption. Long-term maintenance contracts covering annual calibration verification and preventive component replacement are available on request.

Quality Control for the DCS Series Range

Each DCS unit processed by DriveKNMS undergoes a structured verification protocol before dispatch. Output voltage and current are measured at 0%, 25%, 50%, 75%, and 100% of rated load using calibrated electronic loads traceable to national standards. Remote programming accuracy is verified via the 9-pin D-sub interface across the full analog input range. Ripple and noise are measured with a 20 MHz bandwidth oscilloscope at full load. Thermal cycling (ambient to 50 °C) is applied to units with repaired power stage components. All results are documented on a unit-specific test record shipped with the equipment.