RELIANCE 0-51878-3 VFB Voltage Feedback Board

Technical SpecificationsModel:0-51878-3 Brand:RELIANCE Product type:VFB Voltage Feedback Board Weight:0.55kg Dimension:210mm135mm30mm Operating temperature:0℃ ~ 60℃ Storage temperature:-40℃ ~ +85℃ Relative humidity:5%~85%,non-condensing Certification:CE

System compatibility0-51878-3 is RELIANCE VFB rack plug-in voltage feedback board. It is designed for Reliance MaxPak Plus series spindle DC drive rack,cooperates with USAB summing amplifier board and CGSA gate summing board. It samples armature voltage signal,performs isolation and conditioning,outputs standardized feedback signal for speed closed-loop regulation. Commonly used for maintenance and spare replacement of old industrial spindle DC drive equipment.

Function0-51878-3 is dedicated VFB voltage feedback PCB for RELIANCE MaxPak Plus DC drive system. Collect armature voltage signal from power unit,complete signal isolation,attenuation and filtering. Convert raw sampled signal into stable analog feedback signal and send to summing amplifier for speed deviation calculation. Front panel multi-turn high-precision potentiometers for feedback gain and zero offset calibration. Built-in overvoltage protection circuit to prevent over-range signal damage to subsequent control boards. Dual LED indicators display power supply status and feedback fault alarm. Optimized isolation circuit reduces common-mode interference from high power section.

InstallationPower off the whole drive cabinet and cut main power supply. Insert 0-51878-3 VFB board into drive rack slot and lock retaining screw. Connect gold finger backplane connector for internal signal exchange. Separate high voltage sampling wiring from low-level analog signal cables. Power on system,calibrate feedback gain and zero offset via front potentiometers. Verify voltage sampling accuracy under different motor speed conditions.

InterfaceBackplane edge connector,armature voltage sampling input,conditioned analog feedback output,auxiliary power terminal,shield grounding terminal,dual status LED indicators,front multi-turn calibration potentiometer bank.

FeatureRELIANCE 0-51878-3 rack mount VFB voltage feedback board. Discrete analog sampling and signal conditioning circuit for armature voltage feedback. Front panel multi-turn adjustable potentiometers for gain and offset calibration. High common-mode noise rejection and signal isolation design. Gold plated edge connector for reliable rack signal transmission. Dual LED visual indication for power and feedback 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 speed drift:feedback gain drift or potentiometer aging; Incorrect speed reading:sampling circuit damage; Fault LED lit:overvoltage sampling or internal circuit saturation; No feedback signal output:isolation circuit failure; Intermittent speed jitter:backplane pin oxidation and poor contact.

Product BriefRELIANCE 0-51878-3 is VFB voltage feedback board. It samples and conditions DC motor armature voltage signal,provides accurate speed feedback for Reliance MaxPak Plus legacy spindle DC drive closed-loop speed control,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.