Giddings & Lewis 502-03994-11 Processor Module

Technical SpecificationsModel：502-03994-11 Brand：Giddings & Lewis Product Type: Single-slot plug-in PiC900 series 945 CPU processor module for PiC900 rack backplane

Module Feature:Function: PiC900 945 main controller board, executes G-code program, multi-axis motion interpolation, I/O scanning and ARCNET peer-to-peer bus communication for G&L heavy CNC boring mills and machining centers. Processor: High speed microprocessor optimized for machine tool motion control Memory: Onboard flash memory for firmware storage; battery-backed RAM to retain part programs, axis parameters and runtime data Communication: ARCNET bus interface, RS232 serial port for HMI operator panel connection Motion capability: Multi-axis closed-loop servo interpolation, linear, circular and helical interpolation support Firmware: Field upgradable PiCPro firmware LED indicators: OK, RUN, SYS FLT, COM, NET diagnostic status lights Hardware self-diagnosis: Memory integrity check, backplane bus monitoring, ARCNET network diagnosis, watchdog fault detection Programming software: PiCPro programming, configuration and diagnostic software

Electrical ParametersBackplane supply:+3.3V and +5V from PiC900 rack backplane Power consumption:Max 4.6W Backup battery for RAM parameter retention, sold separately

Mechanical & Structure:Mounting:Plug into PiC900 rack single slot Weight:0.24kg Protection class:IP20

Environmental:Operating temperature:0℃ ~ +60℃ Ambient humidity:5~85% non-condensing Certification:CE Status:Manufacturer discontinued legacy CNC control module

System compatibility502-03994-11 belongs to Giddings & Lewis PiC900 control platform, also marked M.1016.9491. Compatible with PiC900 backplane, SERCOS communication boards, digital & analog I/O boards and original operator panels. Widely deployed on G&L 70A series horizontal boring mills, PMC CNC boring machines and heavy-duty machining centers.

Function502-03994-11 is PiC900 945 CPU board manufactured by Giddings & Lewis. It runs PiCPro CNC software to parse G codes and perform real-time multi-axis servo interpolation. Integrated ARCNET bus realizes distributed I/O expansion and inter-controller data exchange. Battery-backed RAM protects machine parameters and CNC programs during power outage. This is a critical replacement spare controller for legacy Giddings & Lewis heavy CNC machine systems.

InstallationFollow lockout/tagout safety procedure before installation. Cut off rack backplane power. Insert 502-03994-11 module into PiC900 backplane slot and lock retainer. Install backup battery for memory retention. Connect ARCNET network cable and HMI serial cable. Configure node address and machine axis parameters via PiCPro software. Power rack on and verify CNC boot, axis movement and network communication.

InterfacePiC900 backplane gold-edge connector,ARCNET port,serial communication port,on-board OK / RUN / SYS FLT / COM / NET LED indicators for Giddings & Lewis 502-03994-11.

DiagnosticCNC boot failure:Check backplane power supply, backup battery voltage or module seating condition. NET alarm:ARCNET cable fault, improper termination or node address conflict. SYS FLT LED lit:Memory corruption, firmware damage or backplane bus communication failure.

Product Brief502-03994-11 is Giddings & Lewis legacy PiC900 945 CPU processor module,with ARCNET bus for heavy CNC boring mills and machining centers,discontinued CNC control spare card.