Giddings & Lewis 502-03963-30 Digital Input Module

Technical SpecificationsModel：502-03963-30 Brand：Giddings & Lewis Product Type: Single-slot plug-in PiC900 series 32-point 24VDC digital input module for PiC900 CNC rack backplane

Module Feature:Function: Digital signal acquisition module for PiC900 CNC system, collects discrete 24VDC field signals including limit switches, proximity sensors, push buttons and machine status feedback signals. Channel count:32 channels digital input Signal type:Sinking input, nominal 24VDC Input logic:High level active Input filter:Hardware debounce filter for noisy machine environment LED indicators:OK, CHANNEL ACTIVE, FAULT diagnostic lights Hardware self-diagnosis:Backplane bus communication detection, overvoltage protection, channel status monitoring Programming software:PiCPro I/O address assignment and diagnostic tool

Electrical ParametersBackplane supply:+5V from PiC900 rack Field power:External 24VDC for field sensors Power consumption:Max 3.0W External 24VDC field power required for sensor side

Mechanical & Structure:Mounting:Plug into PiC900 rack single slot Weight:0.21kg Protection class:IP20

Environmental:Operating temperature:0℃ ~ +60℃ Ambient humidity:5~85% non-condensing Certification:CE Status:Manufacturer discontinued legacy CNC I/O module

System compatibility502-03963-30 belongs to Giddings & Lewis PiC900 control family. Compatible with PiC900 backplane, CPU processor board, analog I/O and digital output modules. Widely used on G&L 70A horizontal boring mills and PMC CNC boring machines for travel limit, door interlock and hydraulic status signal reading.

Function502-03963-30 is PiC900 32-point 24VDC digital input module manufactured by Giddings & Lewis. It reads discrete field switch signals and transfers digital data to PiC900 CPU through rack backplane. Built-in hardware debounce filter eliminates signal bounce from mechanical limit switches. It collects safety interlock, axis overtravel, coolant level and lubrication status signals for heavy machine tool CNC control.

InstallationFollow lockout/tagout safety procedure before operation. Cut off rack power and external 24VDC field supply. Insert 502-03963-30 module into PiC900 backplane slot and lock retainer. Connect sensor wiring to terminal block, separate signal cable from high power cable to reduce EMI. Configure I/O address mapping in PiCPro software. Power on rack and verify each input channel response.

InterfacePiC900 backplane gold-edge connector,field wiring terminal block,on-board OK / CHANNEL ACTIVE / FAULT LED indicators for Giddings & Lewis 502-03963-30.

DiagnosticNo signal reading:Check external 24VDC sensor power, wiring polarity or channel address setup. FAULT LED lit:Backplane communication error or overvoltage on field side. Random signal fluctuation:Insufficient cable shielding or mechanical switch contact wear.

Product Brief502-03963-30 is Giddings & Lewis legacy PiC900 32-point 24VDC digital input module,for collecting limit,interlock and sensor signals on heavy CNC boring mills,discontinued CNC I/O spare card.