Fives Group 502-03548-00 Digital Input Module

Technical Specifications

Model： 502-03548-00

Brand： Fives Group

Product Type: Rack mount opto-isolated 24VDC digital input PCB assembly for legacy CNC system

Module Feature:

Function: Digital input module for Fives Group CNC platform. Receives 24VDC switching signals from machine limit switches, safety interlocks, proximity sensors and auxiliary feedback contacts, converts field signals into isolated digital logic data and transmits to CNC CPU and PLC for heavy horizontal boring mills and large machining centers.

Signal Type: 24VDC discrete input with opto-electrical isolation Bus interface: Parallel backplane bus for bidirectional real-time data communication with CNC CPU and PLC boards

Onboard components: Optocoupler isolation chips, input debounce filter, overvoltage and short-circuit protection, signal conditioning circuit, address decoding logic

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

Hardware self-diagnosis: Input channel status detection, signal amplitude verification, backplane bus integrity check

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

Electrical Parameters

Backplane supply: +5VDC Field input supply: 24VDC

Power consumption: Max 7.0W

Mechanical & Structure:

Mounting: Rack slot mount with gold finger edge connector

Weight: 0.90kg

Protection class: IP20

Environmental:

Operating temperature: 0℃ ~ +55℃

Ambient humidity: 5~85% non-condensing

Certification: CE

Status: Manufacturer discontinued legacy 24VDC digital input module

System compatibility

Compatibility description: 502-03548-00 belongs to Fives Group CNC I/O family. Compatible with Fives Group main CPU, PLC processor and other rack control boards. Widely deployed on heavy Fives Group horizontal boring mills.

Function

Function description: 502-03548-00 is opto-isolated 24VDC digital input board manufactured by Fives Group. It collects on/off status signals from machine-side sensors and switches. Optocoupler separates field 24V circuit from low-voltage CNC backplane circuit to block surge and electromagnetic noise. Built-in debounce circuit eliminates false triggering caused by mechanical contact bounce. It is legacy digital input spare for heavy CNC boring mills.

Installation

Installation steps: Follow lockout/tagout safety procedure before installation. Cut off rack +5V backplane power and 24VDC field power. Insert 502-03548-00 board into rack slot and secure gold finger connector. Connect sensor cables to input terminal block. Configure input addresses via Fives CNC software. Restore power, verify SIG and IN LED indicators and test each input channel signal reading.

Interface

Interface list: Backplane gold finger connector, 24VDC signal screw terminal block,on-board POWER / SIG / IN / FAULT LED indicators for Fives Group 502-03548-00.

Diagnostic

Troubleshooting: No input signal detected: Check 24V field supply, wiring or damaged optocoupler component. FAULT LED lit: Channel short-circuit trigger, backplane communication failure or surge damage. Random unstable input: Ground loop interference, poor shielding or aging optocoupler.

Product Brief

Brief description: 502-03548-00 is Fives Group legacy 24VDC opto-isolated digital input board,to acquire machine switch and sensor signals for CNC interlock logic on heavy CNC boring mills,discontinued CNC digital input PCB spare.