Fives Group 502-03843-00 Digital I/O Interface Module

Technical Specifications

Model： 502-03843-00

Brand： Fives Group (Giddings & Lewis)

Product Type: Rack mount digital I/O signal conditioning PCB assembly for legacy PIC900 CNC control system

Module Feature:

Function: Digital I/O interface module for Fives Group PIC900 CNC platform. Performs signal level conversion, buffering and noise filtering between backplane bus and field I/O modules. Isolates digital signals, suppresses transient spikes and ensures stable transmission of sensor input and PLC output signals for heavy horizontal boring mills and large machining centers.

Bus interface: Parallel backplane bus for bidirectional real-time data exchange with CNC CPU and PLC Onboard components: Signal buffer ICs, level conversion circuits, RC noise filter, surge suppression diodes, short-circuit protection, address decoding logic

LED indicators: POWER, SIG, ACT, FAULT diagnostic lights

Hardware self-diagnosis: Signal level detection, channel handshake test, backplane bus integrity verification

Programming software: Fives Group proprietary CNC software for I/O channel diagnostic and hardware resource identification

Electrical Parameters

Backplane supply: +5VDC

Power consumption: Max 7.1W

Mechanical & Structure:

Mounting: Rack slot mount with gold finger edge connector

Weight: 0.91kg

Protection class: IP20

Environmental:

Operating temperature: 0℃ ~ +55℃

Ambient humidity: 5~85% non-condensing

Certification: CE

Status: Manufacturer discontinued legacy PIC900 digital I/O interface module

System compatibility

Compatibility description: 502-03843-00 belongs to Fives Giddings & Lewis PIC900 CNC I/O family. Compatible with PIC900 CPU and series I/O boards. Widely deployed on heavy Fives horizontal boring mills.

Function

Function description: 502-03843-00 is digital I/O interface board manufactured by Fives Group (Giddings & Lewis). It acts as intermediate signal conditioning board between CNC rack backplane and field I/O. It buffers digital signals, converts logic levels and filters electromagnetic interference from workshop environment. It protects backplane circuits from field-side voltage transients and stabilizes I/O signal transmission. It is legacy I/O signal conditioning spare for heavy CNC boring mills.

Installation

Installation steps: Follow lockout/tagout safety procedure before installation. Cut off rack +5V backplane power. Insert 502-03843-00 board into rack slot and secure gold finger connector. Inspect all wiring terminals. Restore rack power, verify SIG and ACT LED indicators, run I/O diagnostic test and validate input and output signal status.

Interface

Interface list: Backplane gold finger connector, multi-channel I/O signal header,on-board POWER / SIG / ACT / FAULT LED indicators for Fives Group 502-03843-00.

Diagnostic

Troubleshooting: I/O signals unstable: Check ground connection, cable shielding or damaged buffer chip. FAULT LED lit: Signal overvoltage, bus parity error or backplane contact fault. Partial channel no response: Individual filter or level shift component aging.

Product Brief

Brief description: 502-03843-00 is Fives Group legacy PIC900 digital I/O interface board,for signal buffering and conditioning between CNC backplane and field I/O on heavy CNC boring mills,discontinued CNC I/O interface PCB spare.