RELIANCE 0-51865-2 FBC Field Board Card

Technical SpecificationsModel:0-51865-2 Brand:RELIANCE Product type:FBC Field Board Card Weight:0.57kg Dimension:210mm135mm30mm Operating temperature:0℃ ~ 60℃ Storage temperature:-40℃ ~ +85℃ Relative humidity:5%~85%,non-condensing Certification:CE

System compatibility0-51865-2 is RELIANCE upgraded FBC rack plug-in field excitation control board. It is revised version of 0-51865 and 0-51865-1,designed for Reliance MaxPak Plus series spindle DC drive rack,cooperates with USAB summing amplifier board and CGSA gate summing board. It controls DC motor field excitation current and provides stable field weakening transition for spindle high-speed operation. Commonly used for maintenance and spare replacement of old industrial spindle DC drive equipment.

Function0-51865-2 is dedicated FBC field excitation control PCB for RELIANCE MaxPak Plus DC drive system. Receive speed reference and field current feedback signals from drive control rack. Regulate motor field excitation current to maintain stable magnetic flux under base speed. Improved field weakening response for smoother switching between constant torque and constant power zone. Front panel high precision potentiometers for field current limit and field weakening threshold adjustment. Generate SCR firing pulses to control field excitation power output. Dual LED indicators for normal running and field fault alarm. Optimized component layout to reduce signal drift caused by temperature variation.

InstallationPower off the whole drive cabinet and cut main power supply. Insert 0-51865-2 FBC board into drive rack slot and lock retaining screw. Connect gold finger backplane connector for internal signal exchange. Separate low-level analog control wiring from field power pulse cables. Power on system,calibrate field current limit and field weakening threshold via front potentiometers. Verify field current stability and high-speed transition performance.

InterfaceBackplane edge connector,speed reference input,field current feedback input,field SCR trigger pulse output,auxiliary power terminal,shield grounding terminal,dual status LED indicators,front calibration potentiometer bank.

FeatureRELIANCE 0-51865-2 rack mount FBC field excitation control board. Discrete analog closed-loop circuit for field current regulation. Front panel adjustable high precision potentiometers for multi-parameter calibration. Better thermal stability and anti-interference capability compared with 0-51865 base version. Gold plated edge connector for reliable rack signal transmission. Dual LED visual indication for running and fault state. Industrial PCB design for long continuous running in harsh factory environment. Discontinued obsolete board,supply only for old Reliance MaxPak Plus DC drive system spare replacement. Suitable for metallurgy,paper-making production line spindle DC drive renovation and maintenance.

DiagnosticMotor high-speed instability:field weakening potentiometer drift or component aging; Fluctuating field current:feedback sampling circuit damage; Field fault LED lit:field overcurrent or loss of excitation; No excitation output:SCR trigger circuit failure; Intermittent speed variation:backplane pin oxidation and poor contact.

Product BriefRELIANCE 0-51865-2 is FBC field board card. It completes closed-loop regulation of DC motor field excitation current and field weakening control for Reliance MaxPak Plus legacy spindle DC drive,realizing wide speed range of constant torque and constant power,widely used as spare part for legacy DC drive equipment maintenance.

Disclaimer:All parameters are for reference only and not the basis of quotation. Goods are scarce,overseas delivery lead time 3-7 working days. It is only used for equipment maintenance and retrofit.