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ElectroCraft SCA-SS-70-10
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ABB SCA1390
ABB SCA1390
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Pacific Scientific 33VM52-000-29
Pacific Scientific 33VM52-000-29

ElectroCraft SCA-SS-70-10

Product Introduction:​
The SCA-SS-70-10 is a fully enclosed four-quadrant PWM servo amplifier for brushed permanent-magnet DC (PMDC) motors. Housed in a rugged extruded aluminum case, it is configured via DIP switches for torque, IR compensation, tachometer-based speed control, or encoder-based speed control. It is widely used to retrofit or drive small- to medium-sized DC servo motors in OEM machinery.
Category:
Description
Key Features:
  • Four-quadrant regenerative operation (motoring & braking)
  • MOSFET output stage >95 % efficiency
  • DIP-switch selectable control mode (torque / speed with tacho / speed with encoder)
  • Integrated over-current, over-temperature, and motor-short protection
  • On-board potentiometers for gain, max current, max speed, IR compensation
Technical Specifications:
  • Supply Voltage:​ 11 – 70 VDC (nominal 12–48 VDC typical)
  • Continuous Output Current:​ 10 A
  • Peak Output Current:​ 20 A (short duration)
  • Max. Output Power:​ ≈700 W (with heatsink)
  • PWM Frequency:​ 49 kHz
  • Control Input – Setpoint:​ –10 to +10 VDC (Ri = 20 kΩ)
  • Encoder Input:​ A/B channels, TTL 5 V, max 100 kHz
  • Tacho Input:​ ±50 VDC max (Ri = 100 kΩ)
  • Aux. Supplies:​ +5 VDC / 100 mA (hall / encoder), +15 VDC / 20 mA, –15 VDC / 20 mA
  • Monitor Outputs:​ Current monitor 0.5 V/A, Speed monitor 10 V @ n_max
  • Enable / Disable / Fwd-Rev Inhibit:​ +8 to +30 VDC active
  • Fault Outputs:​ Open-collector Ready / Error (max 30 VDC, 20 mA)
  • Dimensions (L×W×H):​ 180 × 100 × 40 mm (7.09″ × 3.94″ × 1.57″)
  • Mounting:​ Panel mount, 120 × 90 mm hole spacing
  • Operating Temp.:​ –10 °C to +45 °C
  • Weight:​ ≈120 g
Applications:​ Conveyor drives, label applicators, medical device actuators, small robotic joints using PMDC motors.
Installation Notes:​ Provide adequate heatsinking if continuous current >5 A. Separate signal and power wiring. Set current limit potentiometer before connecting motor. Disable enable input until commissioning is complete.
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