RELIANCE 0-51851-5 CLDL Current Limit Detection Board

Technical SpecificationsModel:0-51851-5 Brand:RELIANCE Product type:CLDL Current Limit Detection Board Weight:0.58kg Dimension:210mm135mm30mm Operating temperature:0℃ ~ 60℃ Storage temperature:-40℃ ~ +85℃ Relative humidity:5%~85%,non-condensing Certification:CE

System compatibility0-51851-5 is RELIANCE upgraded CLDL rack plug-in current limit detection board. It is revised version of 0-51851 and 0-51851-4,designed for Reliance MaxPak Plus series spindle DC drive rack,cooperates with CVTC sampling board and IRCP interlock relay board. It monitors armature current threshold and provides overcurrent protection trigger signal for spindle drive system. Commonly used for maintenance and spare replacement of old industrial spindle DC drive equipment.

Function0-51851-5 is dedicated CLDL current limit detection PCB for RELIANCE MaxPak Plus DC drive system. Receive scaled armature current feedback signal from CVTC board. Compare real-time current value with preset threshold set by front panel potentiometer. Output logic trigger signal once current exceeds preset limit value. Send fault signal to IRCP relay board to activate drive interlock and shut down SCR firing pulse. Further optimized filter circuit and noise suppression design to reduce false triggering caused by transient current spike. Single high-precision adjustable potentiometer for current-limit threshold setting. Front LED indicators for overcurrent alarm status.

InstallationPower off the whole drive cabinet and cut main power supply. Insert 0-51851-5 CLDL board into drive rack slot and lock retaining screw. Connect gold finger backplane connector for internal signal exchange. Separate analog current sensing wiring from power pulse cables. Power on system,set current threshold via front potentiometer. Verify protection action when armature current exceeds preset limit.

InterfaceBackplane edge connector,armature current feedback input,over-limit fault logic output,auxiliary power terminal,shield grounding terminal,status LED indicators.

FeatureRELIANCE 0-51851-5 rack mount CLDL current limit detection board. Discrete analog comparator circuit for current threshold detection. Front panel high precision adjustable potentiometer for current limit calibration. Improved anti-interference filter and noise suppression compared with 0-51851-4 version. Gold plated edge connector for reliable rack contact. Visual LED alarm indication for overcurrent fault. 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.

DiagnosticFalse overcurrent protection trip:threshold potentiometer drift or transient spike interference; No fault output when overcurrent:comparator circuit damage; LED indicator not lighting:missing auxiliary power; Current threshold cannot be adjusted:potentiometer wear; Intermittent protection action:backplane pin oxidation and poor contact.

Product BriefRELIANCE 0-51851-5 is CLDL current limit detection board. It receives armature current feedback signal,monitors current threshold,generates interlock fault signal for Reliance MaxPak Plus legacy spindle DC drive overcurrent protection,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.