Giddings & Lewis 503-25210-20 Digital I/O Board

Technical Specifications

Model： 503-25210-20

Brand： Giddings & Lewis

Product Type: Rack mount digital I/O PCB assembly for PiC900 CNC system

Module Feature:

Function: Digital input and output interface board for G&L PiC900 CNC platform. Collects discrete digital signals from machine sensors, limit switches and emergency stop; outputs control signals to machine relays, contactors and auxiliary actuators for heavy horizontal boring mills and large machining centers.

Signal type: 24VDC discrete digital input and output channels

Bus interface: Parallel backplane bus for I/O data exchange with PiC900 CPU

Onboard feature: Overvoltage and short-circuit protection for field channels

LED indicators: POWER, ACT, FAULT diagnostic lights

Hardware self-diagnosis: Backplane communication test, I/O channel integrity detection, short-circuit fault alarm

Programming software: PiCPro for I/O address assignment and channel diagnostic testing

Electrical Parameters

Backplane supply: +5VDC

Field I/O supply: 24VDC

Power consumption: Max 9.0W

Mechanical & Structure:

Mounting: Rack slot mount with gold finger edge connector

Weight: 0.9kg

Protection class: IP20

Environmental:

Operating temperature: 0℃ ~ +60℃

Ambient humidity: 5~85% non-condensing

Certification: CE

Status: Manufacturer discontinued legacy PiC900 digital I/O board

System compatibility

Compatibility description: 503-25210-20 belongs to Giddings & Lewis PiC900 I/O family. Compatible with PiC900 main CPU, SERCOS motion control modules and servo drive units. Widely fitted on heavy G&L horizontal boring mills.

Function

Function description: 503-25210-20 is digital I/O board manufactured by Giddings & Lewis. It acts as signal bridge between PiC900 CNC controller and machine field discrete devices. It reads safety interlock, limit, jog and sensor signals, and sends out control commands to spindle, coolant and other auxiliary machine components. It integrates protection circuits to avoid damage caused by field short circuit. It is legacy digital I/O spare for heavy G&L CNC boring mills.

Installation

Installation steps: Follow lockout/tagout safety procedure before installation. Cut off rack +5V backplane power and 24VDC field power. Insert 503-25210-20 board into rack slot and secure gold finger connector. Wire field 24VDC I/O signals with shielded cables. Configure I/O addresses via PiCPro, run self-test and verify all input and output channels.

Interface

Interface list: Backplane gold finger connector, 24VDC field I/O screw terminal block,on-board POWER / ACT / FAULT LED indicators for Giddings & Lewis 503-25210-20.

Diagnostic

Troubleshooting: I/O channel no response:Check 24VDC field power supply, wiring damage or burned channel circuit. FAULT LED lit:Backplane communication timeout or short-circuit fault on field output. Signal jitter:Ground loop interference or poor terminal contact.

Product Brief

Brief description: 503-25210-20 is Giddings & Lewis legacy digital I/O board for PiC900 CNC system,for collecting machine discrete sensor signals and outputting auxiliary control signals on heavy CNC boring mills,discontinued CNC I/O PCB spare.