EPS-Sx The EPS-Sx is a small footprint power chassis for use with low voltage (60 Volts or less) edge mount style amplifiers. Available in two, three or four axis versions, the EPS Series chassis includes an unregulated Bus Voltage supply, and pre-wired connections for amplifier inputs and outputs. Available options include a regulated Bias Supply (12VDC @ 500mA) / Shunt Regulator card (10A peak, 3A RMS @ 60 Volts), and a Top Cover. All components are housed within the chassis, with the exception of the four axis version, which requires an external transformer.

Also available is a single axis version of the EPS with a built in PMC-S1 Motion Controller. This makes a very compact single-axis system complete with a power supply, amplifier and controller all in one unit.


  • Pre-Wired Connections for Amplifier Inputs and Outputs
  • Available Bus Voltages: 27, 35, 40, 45, 60 or 80VDC
  • Available Bias Supply / Shunt Regulator Card (Bias: 12 VDC @ 500mA / Shunt Reg: 10A Peak, 3A RMS @ 60V)
  • Small Footprint
  • Simplifies Amplifier Installation and Connection
  • Single Axis Version available with Built In PMC-S1 Motion Controller
  • Can House Brush Type or Brushless Amplifiers
  • Uses Standard IEC Style Power Cord
  • Advanced Design, High Quality and High Reliability at a Lower Cost


Standard Models:


S2-4/25 S3-4/25 S4-4/25
Max Num. of Axes 1 2 3 4
Weight 5.05 Lb
(2.29 Kg)
5.05 Lb
(2.29 Kg)
5.05 Lb
(2.29 Kg)
5.05 Lb
(2.29 Kg)
Notes With PMC-S1 Controller External Transformer
Input Voltage 120 VAC
Bus Output Voltage 27, 35, 40, 45, 60 or 80 VDC
Bus Output Current* 25A Continuous
Main Transformer 250 Watt Standard, Others Optional
Accessories See Chart Below
Recommended Amplifiers BLH-S1, PDH-S3LDH-S2, LDH-S3

*All ratings with forced air cooling to maintain 40C heat sink temperature. Failure to keep constant air flow to the heat sink will reduce the output current capacity and may result in damage to the unit.

Ordering Information

Product Order Number
EPS-S1-4/25-PMC Chassis 40 VDC/25A WS-904-0004
EPS-S2-4/25 Chassis 40 VDC/25A WS-904-0001
EPS-S3-4/25 Chassis 40 VDC/25A WS-904-0002
EPS-S4-4/25 Chassis 40 VDC/25A WS-904-0003
OPT-T1A 0.25 kVa Transformer 27V,35V,40V WS-005-0001
OPT-T1A 0.50 kVa Transformer WS-005-0002
OPT-T1A 1.0 kVa Transformer WS-005-0003
OPT-T1A 0.25 kVa Transformer 40V,60V,80V WS-005-0014
OPT-T1A 0.50 kVa Transformer WS-005-0015
OPT-T1A 1.0 kVa Transformer WS-005-0016
ACC-C1A Shunt Regulator / Bias Supply WS-011-0010
ACC-C2B 3 Phase Inductor Assembly WS-011-0011
ACC-C2C 2 Phase Inductor Assembly WS-011-0017

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All data sheets are in Adobe Acrobat format.