Giddings & Lewis 502-03839-04 Digital I/O Module

Technical Specifications

Model： 502-03839-04

Brand： Giddings & Lewis

Product Type: Rack mount discrete digital input/output PCB assembly for legacy NumeriPath CNC system

Module Feature:

Function: Digital I/O interface board for G&L NumeriPath CNC platform. Receives discrete digital signals from machine limit switches, proximity sensors, pushbuttons and safety interlocks; outputs digital control signals to relays, contactors, solenoid valves for heavy horizontal boring mills and large machining centers.

Signal type: 24VDC discrete input / output

Bus interface: Parallel backplane bus for data exchange with CNC executive CPU

Onboard components: Opto-coupler isolation chips, input signal buffers, output driver circuits

LED indicators: POWER, IN, OUT, FAULT diagnostic lights

Hardware self-diagnosis: I/O channel hardware check, short-circuit detection, backplane communication integrity test

Programming software: Giddings & Lewis proprietary CNC software for I/O address assignment and diagnostic testing

Electrical Parameters

Backplane supply: +5VDC Field I/O supply: 24VDC

Power consumption: Max 7.2W

Mechanical & Structure:

Mounting: Rack slot mount with gold finger edge connector

Weight: 0.92kg

Protection class: IP20

Environmental:

Operating temperature: 0℃ ~ +55℃

Ambient humidity: 5~85% non-condensing

Certification: CE

Status: Manufacturer discontinued legacy NumeriPath digital I/O board

System compatibility

Compatibility description: 502-03839-04 belongs to Giddings & Lewis NumeriPath digital I/O family. Compatible with matching rack backplane, executive CPU and other interface boards. Widely fitted on vintage heavy G&L horizontal boring mills.

Function

Function description: 502-03839-04 is digital input/output board manufactured by Giddings & Lewis. It serves as signal bridge between NumeriPath CNC controller and machine field devices. Opto-isolation separates CNC logic circuit and 24V field circuit to reduce industrial noise interference. Input channels collect safety, limit and operator panel signals; output channels trigger solenoids and relay actuators for machine hydraulic, lubrication and safety control. It is legacy discrete I/O spare for heavy G&L CNC boring mills.

Installation

Installation steps: Follow lockout/tagout safety procedure before installation. Cut off rack +5VDC backplane power and 24VDC field power. Insert 502-03839-04 board into rack slot and secure gold finger connector. Wire field 24VDC sensor and actuator cables to terminal block. Configure I/O addresses in CNC software. Restore power, verify IN/OUT LED indicators and test each discrete channel.

Interface

Interface list: Backplane gold finger connector, multi-channel 24VDC I/O screw terminal block,on-board POWER / IN / OUT / FAULT LED indicators for Giddings & Lewis 502-03839-04.

Diagnostic

Troubleshooting: Input no detection: Check 24V field supply, sensor wiring or damaged opto-coupler. FAULT LED lit: Output short-circuit, backplane communication failure or onboard circuit fault. Random signal fluctuation: Poor grounding, unshielded cable or electrical noise interference.

Product Brief

Brief description: 502-03839-04 is Giddings & Lewis legacy NumeriPath digital I/O board,with opto-isolated 24VDC discrete channels for machine safety switch and actuator control on heavy CNC boring mills,discontinued CNC digital I/O PCB spare.