GE 531X167MFRALG1 Motor Excitation Remote Control Board

GE 531X167MFRALG1 Motor Excitation Remote Control Board

I. Basic Model Information
Full part number: 531X167MFRALG1
Internal substrate number: F31X167MFRADG1
Brand: GE General Electric
Ownership system: DC300 high-power DC speed control driver (core drive system for steel rolling mills and papermaking DC main drive)
Full name: Motor Field Remote Board motor excitation remote signal board
Life cycle: The original factory has discontinued production, and the market only has new / refurbished spare parts in circulation

Model Characteristic Interpretation
531X: Prefix of the GE direct current drive board series
167: Function group (excitation remote acquisition control)
MFR: Motor Field Remote motor excitation remote
ALG1: Hardware version, terminal configuration version (cannot be mixed with suffixes such as AKG1)

 Core Function Positioning
As the remote signal acquisition and control interface board for the excitation circuit of the DC300 DC speed control cabinet, it realizes three core functions:
Real-time acquisition of DC motor excitation current / voltage
Collecting excitation winding CT, PT analog signals, uploading to the main control board for excitation closed-loop regulation, controlling the motor to weak magnetic speed increase, constant torque output.
Remote excitation start-stop and fault interlock
Receiving local / upper-level PLC excitation switching instructions, outputting excitation contactor, fan, temperature protection interlock contacts; detecting excitation break, overcurrent, loss of excitation faults and reporting to the drive main control.
High and low voltage signal isolation and transfer
Isolating the strong interference on the excitation power side from the weak electrical circuit of the main control, matching long-distance remote excitation cabinet wiring, suitable for the dusty and strong harmonic working conditions of the rolling mill site.

Key Hardware Configurations
Signal Channels
Multiple analog quantity acquisition circuits (excitation current, excitation voltage); multiple DI/DO switch quantity interlock terminals; onboard 2 red fault status LED indicators.
Interface Structure
One side with gold fingers for connecting to the DC300 drive machine frame backplane bus; the other side with plug-in terminal blocks for external connection of excitation transformer, excitation winding, temperature switch, external interlock.
Electrical Environment
Power supply: Backplane of the machine frame DC24V
Operating temperature: 0℃ ~ +60℃ (installed in the control cabinet room)
Protection: IP20, metal machine frame slot installation
Weight: Approximately 0.09kg, rectangular PCB board structure
Anti-interference Design
Onboard filter capacitors, surge absorption circuits, resisting electromagnetic interference from frequency converters, excitation cabinets, and large power equipment of the rolling mill.

Complete System Complementary Combination
Drive main control board: 531X series CPU / regulation motherboard
Excitation remote board: 531X167MFRALG1
Power rectification unit (excitation rectifier bridge)
DC main motor, excitation transformer
Upper-level control: GE Cimplicity HMI, ControlST, third-party Modbus PLC (such as ABB AC800M)

Typical Application Scenarios
Main drive DC motor speed control system of steel cold rolling / hot rolling units
Large-scale winding, re-rolling, and rewinding direct current drive devices in papermaking, film
Mine hoist, large-scale winch DC speed control drive cabinets
DC motor excitation control of auxiliary equipment in steel plant self-owned power plant