Fives Group 502-03681-00 Digital I/O Module

Technical Specifications

Model： 502-03681-00

Brand： Fives Group

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

Module Feature:

Function: Digital I/O interface module for Fives Group CNC platform. Captures 24VDC discrete signals from machine limit switches, safety interlocks and proximity sensors. Outputs 24VDC drive signals to control solenoid valves, relays and contactors for heavy horizontal boring mills and large machining centers.

Signal type: 24VDC sink/source discrete input / output with opto-electrical isolation

Bus interface: Parallel backplane bus for bidirectional data communication with CNC CPU

Onboard components: Optocoupler isolation chips, signal buffer circuits, output power drivers, transient surge suppression

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

Hardware self-diagnosis: Channel short-circuit detection, input signal monitoring, backplane bus integrity verification

Programming software: Fives Group proprietary CNC software for I/O address mapping and channel diagnostic testing

Electrical Parameters

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

Power consumption: Max 7.5W

Mechanical & Structure:

Mounting: Rack slot mount with gold finger edge connector

Weight: 0.95kg

Protection class: IP20

Environmental:

Operating temperature: 0℃ ~ +55℃

Ambient humidity: 5~85% non-condensing

Certification: CE

Status: Manufacturer discontinued legacy digital I/O module

System compatibility

Compatibility description: 502-03681-00 belongs to Fives Group CNC digital I/O family. Compatible with Fives Group CPU, memory boards and other rack interface modules. Widely fitted on heavy Fives Group horizontal boring mills.

Function

Function description: 502-03681-00 is opto-isolated digital I/O board manufactured by Fives Group. It provides electrical isolation between CNC logic circuit and machine field 24V circuit to block industrial noise and voltage surges, protecting CNC rack hardware. Input channels collect safety and axis limit signals; output channels actuate hydraulic valves and auxiliary machine actuators. It is legacy discrete I/O 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 502-03681-00 board into rack slot and secure gold finger connector. Connect shielded field sensor and actuator cables to terminal block. Configure I/O address mapping via Fives proprietary CNC software. Power on rack, verify IN and OUT LED indicators and test each I/O channel response.

Interface

Interface list: Backplane gold finger connector, multi-channel 24VDC I/O screw terminal block,on-board POWER / IN / OUT / FAULT LED indicators for Fives Group 502-03681-00.

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 driver fault. Signal instability: Poor grounding, unshielded cable or electromagnetic interference.

Product Brief

Brief description: 502-03681-00 is Fives Group legacy opto-isolated digital I/O module,for machine safety and limit signal acquisition and field actuator control on heavy CNC boring mills,discontinued CNC digital I/O PCB spare.