Fives Group 502-03644-02 Relay Output Module

Technical Specifications

Model： 502-03644-02

Brand： Fives Group (Giddings & Lewis)

Product Type: Rack mount 8-point relay output PCB assembly for legacy PIC900 CNC control system

Module Feature:

Function: 8-channel relay output module for Fives Group PIC900 CNC platform. Receives PLC logic commands from CNC CPU, drives 8 onboard electromechanical relays. Relay dry contacts switch AC/DC loads to control coolant pumps, lubrication systems, solenoid valves, tool magazine actuators and machine indicator lamps for heavy horizontal boring mills and large machining centers.

Output Type: 8 isolated mechanical relay contact outputs, contact rating: 250VAC 3A Bus interface: Parallel backplane bus for bidirectional data communication with CNC CPU and PLC boards

Onboard components: Industrial sealed electromechanical relays, relay drive transistors, freewheeling surge suppression diodes, contact feedback circuit, overcurrent protection, address decoding logic

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

Hardware self-diagnosis: Relay coil drive test, contact feedback detection, backplane bus communication verification

Programming software: Fives Group proprietary CNC software for relay output address mapping and module diagnostic testing

Electrical Parameters

Backplane supply: +5VDC Relay coil supply: 24VDC

Power consumption: Max 7.5W

Mechanical & Structure:

Mounting: Rack slot mount with gold finger edge connector

Weight: 0.93kg

Protection class: IP20

Environmental:

Operating temperature: 0℃ ~ +55℃

Ambient humidity: 5~85% non-condensing

Certification: CE

Status: Manufacturer discontinued legacy PIC900 8-point relay output module

System compatibility

Compatibility description: 502-03644-02 belongs to Fives Giddings & Lewis PIC900 CNC I/O family. Compatible with G&L PIC900 CPU and PLC processor boards. Widely deployed on heavy Fives horizontal boring mills.

Function

Function description: 502-03644-02 is 8-point relay output board manufactured by Fives Group (Giddings & Lewis). It converts low-voltage CNC logic signals into isolated dry relay contacts for machine auxiliary loads. Relay contacts fully separate CNC control circuit from field high-power loads, protecting rack electronics from inductive voltage spikes and industrial electrical noise. Each channel provides independent switching control for machine auxiliary equipment. It is legacy auxiliary relay control spare for heavy CNC boring mills.

Installation

Installation steps: Follow lockout/tagout safety procedure before installation. Cut off rack +5V backplane power and 24VDC relay coil power. Insert 502-03644-02 board into rack slot and secure gold finger connector. Wire external field loads to relay contact terminal block. Configure output address mapping via Fives CNC software. Restore power, verify RELAY and OUT LED indicators and test each relay switching action.

Interface

Interface list: Backplane gold finger connector, relay contact screw terminal block,on-board POWER / RELAY / OUT / FAULT LED indicators for Fives Group 502-03644-02.

Diagnostic

Troubleshooting: Relay not energizing: Check 24VDC coil supply, wiring or damaged drive transistor. FAULT LED lit: Backplane communication failure, relay coil short or contact feedback fault. Load cannot activate: Relay contact wear, load overload or inductive spike damage.

Product Brief

Brief description: 502-03644-02 is Fives Group legacy PIC900 8-point relay output board,drives mechanical relays for machine auxiliary load switching on heavy CNC boring mills,discontinued CNC relay interface PCB spare.