Giddings & Lewis 502-03840-00 Servo Interface Module

Technical Specifications

Model： 502-03840-00

Brand： Giddings & Lewis

Product Type: Rack mount servo interface PCB assembly for legacy NumeriPath CNC system

Module Feature:

Function: Servo interface module for G&L NumeriPath CNC platform. Collects encoder position feedback signals from servo motors, converts and transmits position data to CNC CPU, outputs analog velocity command signals to analog servo amplifiers for heavy horizontal boring mills and large machining centers.

Feedback interface: Differential incremental encoder input Command output: ±10V analog velocity command

Bus interface: Parallel backplane bus for data exchange with NumeriPath executive CPU

Onboard components: Encoder receiver circuits, D/A converters, signal isolation and noise suppression components

LED indicators: POWER, ENC, CMD, FAULT diagnostic lights

Hardware self-diagnosis: Encoder signal loss detection, analog output overrange check, backplane communication integrity test

Programming software: Giddings & Lewis proprietary CNC software for axis scaling and module diagnostic testing

Electrical Parameters

Backplane supply: +5VDC Analog reference: ±15VDC

Power consumption: Max 9.0W

Mechanical & Structure:

Mounting: Rack slot mount with gold finger edge connector

Weight: 1.08kg

Protection class: IP20

Environmental:

Operating temperature: 0℃ ~ +55℃

Ambient humidity: 5~85% non-condensing

Certification: CE

Status: Manufacturer discontinued legacy NumeriPath servo interface module

System compatibility

Compatibility description: 502-03840-00 belongs to Giddings & Lewis NumeriPath servo interface family. Compatible with NumeriPath CPU, analog servo drives and incremental encoder equipped G&L servo motors. Widely fitted on vintage heavy G&L horizontal boring mills.

Function

Function description: 502-03840-00 is servo interface board manufactured by Giddings & Lewis. It acts as the signal bridge between NumeriPath CNC controller and analog servo drives. It receives incremental encoder feedback from servo motors and sends position data back to CNC for closed-loop position control. It also converts digital motion commands from CPU into ±10V analog speed signals to control servo motor velocity. Signal isolation reduces electrical noise interference from workshop environment. It is legacy servo interface spare for heavy G&L CNC boring mills.

Installation

Installation steps: Follow lockout/tagout safety procedure before installation. Cut off rack +5V and ±15VDC analog power. Insert 502-03840-00 board into rack slot and secure gold finger connector. Connect shielded encoder cables and analog command cables. Configure axis resolution and scaling parameters in CNC software. Power on rack, verify ENC and CMD LED indicators, test axis homing and positioning accuracy.

Interface

Interface list: Backplane gold finger connector, encoder D-sub port, analog command screw terminal block,on-board POWER / ENC / CMD / FAULT LED indicators for Giddings & Lewis 502-03840-00.

Diagnostic

Troubleshooting: No encoder feedback: Check encoder cable wiring, connector or encoder receiver chip damage. FAULT LED lit: Analog output short circuit, backplane communication failure or reference voltage anomaly. Axis position drift: Poor shielding, ground loop interference or incorrect axis scaling setup.

Product Brief

Brief description: 502-03840-00 is Giddings & Lewis legacy NumeriPath servo interface board,for encoder feedback acquisition and ±10V analog speed command output for heavy CNC boring mill servo axes,discontinued CNC servo interface PCB spare.