DRV-Series Solid-State DC Motor Reversing Contactors, are rated up to 1,000VDC and 200A (continuous). They are commonly used to traverse the direction of DC motors, linear actuators, and solenoid valves.

With a full solid-state H-bridge construction, the internal diode bridge provides a natural discharge path for back-EMF generated at inductive loads’ turn-OFF. This results in a DC switch that is arc-free, wear-free, and noise-free.

Two models are available: DRVS- Standard Model is for polarity reversing only. DRVA- Advanced Model combines the function of both a DC reverser and motor controller, thus can PWM up to 5kHz supporting speed control, soft-start and soft-stop programs.

Sample Applications

• forward and reverse control of DC motors
• reversal of electromagnets & coils
  
• Solar tracker actuators
  
• Cathode/anode electrochemicals
  
• Fast and fine peltier temperature control

Features & Benefits

Benefits

• H-bridge with low loss MOSFET options
  
• Rated up to DC 200A (continuous), 400A (200ms inrush current)
• Customizable for high-power DC loads (such as DC crane and hoist motor)
  
• Suitable for military applications

Features

• TTL/CMOS/Logic input or PLC input
  
• PWM Adjustment Up to 5kHz
  
• 2500Vrms Isolation Voltage
• Forward and Reverse Dual LED Indicators
• Built-in 100ms Interlock Protection
  

Reverser Selection Guidelines:

The following is generally suitable for motors <1HP.

• Choose rated voltage ≥3x the operating voltage for inductive loads.
• SSR's continuous current must be rated for the worst-case current longer than 1 second; usually the stall current.
  
• For reversing inductive loads such as DC brushed motors, ensure rated peak current is ≥5x the maximum current draw. 
  
• Always consider adding a RC snubber across load terminals.

Example #1:

Load: Thompson Actuator Part#:HD12B026-0450ELX1EESD
Operating Voltage: 12 VDC
Rated Stall or Max Current Draw: 18A
Application-specific Current: 5A (nominal), 18A (stall), 12A (peak/inrush)

Choose DRV-Series DC Reversing Contactor:
with rated voltage: ≥36 VDC
with rated continuous current: ≥18A
with rated peak current: ≥5x18A (without soft-stop), or ≥2x18A (with soft-stop)

We can see that regardless of the application-specific nominal and inrush current, the actuator's stall current draw determines SSR's rating. The reason is that the SSR experiences the maximum transient stress when it turns off an inductive load at its maximum current.

Datasheet and Downloads

 Contact us for other requirements.