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Giddings & Lewis 502-03944-00 M
Product Name: PiC900/PiC90 Series Interface and Motion Signal Board
Introduction: This board is a rack-interface and signal-distribution module for legacy Giddings & Lewis CNC and PiC controller systems. It routes bus signals, axis feedback handshakes and power distribution across the controller backplane.
Detailed content
Technical Specifications:
- Catalog base: 502-03944-00
- Revision marking: M / R13 artwork code per board label
- System compatibility: PiC900, PiC90 and related CNC racks
- Bus connection: proprietary G&L backplane card-edge
- Power input: +5 V DC with ±12 V and/or 24 V rails depending rack configuration
- Operating temperature: 0 to 55 °C
- Substrate: heavy multilayer FR-4 with gold-plated edge fingers
Material Composition: FR-4 laminate, gold-plated contact fingers, surface-mount ICs, tantalum and electrolytic decoupling components, tinned or gold signal tracks.
Structural Features: Full-height controller card, edge connector for backplane, onboard driver/receiver stages, feedback conditioning circuits, diagnostic-friendly component layout, secured mounting brackets.
Working Principle: The card receives backplane bus commands and power, conditions axis feedback and I/O signals, and distributes them to CPU and servo interface boards. Isolation and buffering reduce field-noise coupling into the central controller.
Application Scenarios: Horizontal boring mills, machining centers, legacy G&L CNC retrofits, servo feedback routing, rack-level signal distribution.
Installation Requirements: Insert only into the matching G&L rack guide, align gold edge connector fully, verify revision compatibility with CPU firmware, apply anti-oxidation contact treatment if required, and power the rack only after seating is confirmed.
Usage Precautions: Do not mix incompatible revision populations without firmware verification, avoid forced insertion, keep spare boards in anti-static packaging, inspect edge fingers for oxidation, and perform signal testing before returning the machine to production.
