Reliance 0-57210-31 DC2 Drive Regulator Board

Short Description: Reliance 0-57210-31 is a main regulator PCB board for Reliance DC2 series single-phase DC drives. This legacy integrated control board performs closed-loop speed and armature current regulation, generates SCR firing pulses, and provides drive fault monitoring. It is pre-assembled with metal mounting bracket and terminal block, designed for models DC2-66U, DC2-76U, DC2-84U, and widely used as spare replacement for existing small DC drive systems.

Product Functions

• Closed-loop speed and current regulation for Reliance DC2 single-phase DC motor drives
• Generate thyristor SCR firing pulses to control rectifier output voltage (90/180VDC)
• Process tachometer speed feedback and armature current feedback signals
• Built-in overcurrent, overvoltage and thermal fault detection & drive trip protection
• Onboard trim potentiometers for speed calibration, current limit and gain adjustment
• Terminal block interface for field wiring of command signals and motor feedback
• Integrated mounting plate for direct installation inside DC2 drive enclosure

Application Scenarios

• Reliance DC2 series single-phase DC motor drives (DC2-66U, DC2-76U, DC2-84U)
• Small manufacturing machinery, winders, coaters and light extrusion equipment
• Conveyor, web handling and metal finishing equipment with low HP DC motors
• Legacy drive maintenance, spare part inventory and emergency replacement projects
• Retrofit of existing plants equipped with Reliance DC2 compact DC drives
• Electroplating and small process equipment DC power regulation systems

FAQ