Fives Group 502-03550-00 120VAC Digital Input Module

Technical Specifications

Model: 502-03550-00

Brand: Fives Group

Product Type: Rack mount 16-point 120VAC digital input PCB assembly for legacy CNC system

Module Feature:

Function: 120VAC digital input module for Fives Group CNC platform. Collects 120VAC switching signals from machine limit switches, safety interlocks, and auxiliary contact feedback. Converts AC field signals into isolated digital logic signals and transmits data to CNC CPU and PLC for heavy horizontal boring mills and large machining centers.

Signal Type: 120VAC discrete input, opto-electrical isolation Bus Interface: Parallel backplane bus for bidirectional data communication with CNC CPU and PLC boards

Onboard Components: Optocoupler isolation circuits, AC signal rectifier, input debounce logic, surge suppression, channel short-circuit protection

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

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

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

Electrical Parameters

Backplane supply: +5VDC Field input supply: 120VAC

Power consumption: Max 7.3W

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 AC digital input module

System compatibility

Compatibility description: 502-03550-00 belongs to Fives Group CNC I/O family. Compatible with Fives Group CPU, PLC processor and other rack interface boards. Widely deployed on heavy Fives Group horizontal boring mills.

Function

Function description: 502-03550-00 is 16-point 120VAC opto-isolated input board manufactured by Fives Group. It is designed to receive AC switching feedback signals from machine side safety and limit switches. Optocoupler isolation separates high voltage AC field circuit from low voltage CNC control circuit, preventing surge and noise damage to controller. Debounce logic filters contact bounce of mechanical switches. It is legacy AC input spare for heavy CNC boring mills.

Installation

Installation steps: Follow lockout/tagout safety procedure before installation. Cut off rack +5V backplane power and 120VAC field power. Insert 502-03550-00 board into rack slot and secure gold finger connector. Connect field AC signal cable to terminal block. Configure input address mapping via Fives CNC software. Restore power, verify SIG and IN LED indicators and test each input channel status reading.

Interface

Interface list: Backplane gold finger connector, 120VAC signal screw terminal block,on-board POWER / SIG / IN / FAULT LED indicators for Fives Group 502-03550-00.

Diagnostic

Troubleshooting: No input signal detection: Check 120VAC field supply, cable wiring or damaged optocoupler. FAULT LED lit: Channel short-circuit trigger, backplane communication failure or surge damage. Intermittent signal reading: Contact bounce, electromagnetic interference or aging rectifier component.

Product Brief

Brief description: 502-03550-00 is Fives Group legacy 16-point 120VAC digital input board,to collect AC switch feedback signals for CNC safety and interlock logic on heavy CNC boring mills,discontinued CNC AC input PCB spare.