AMC ELG Master Board PCB 539629-003 Rev XA Slave 539630-003 25-Pin D-Sub

AMC ELG Master Board PCB 539629-003 Rev XA Slave 539630-003 25-Pin D-Sub

The AMC ELG Master Board (PCB 539629-003, Rev XA) is a custom industrial control circuit board designed to operate as the master controller in an ELG multi-board system. It interfaces with companion ELG Slave Boards (PCB 539630-003) via D-Sub connectors, coordinating control signals across the system. The board features a distinctive pentagonal PCB form factor populated with a mix of ICs, capacitors, resistors, and multi-pin connectors.

Specifications & What's Included

• Manufacturer: AMC
• Board designation: ELG Master BD
• PCB part number: 539629-003
• Revision: Rev XA
• Companion/slave board: PCB 539630-003 (ELG Slave Board)
• Form factor: Custom pentagonal PCB
• Primary interface connector: 25-pin D-Sub (DB25), centrally mounted on component side
• Additional D-Sub connectors: three D-Sub connectors visible on solder/edge side for inter-board or system connections
• Onboard components: multiple ICs (DIP packages), electrolytic and film capacitors, resistors, screw-terminal block, and assorted passive components
• Includes: board only; no slave boards, cables, or enclosure included

Applications

The AMC ELG Master Board is part of a distributed master/slave control architecture where the master board coordinates multiple slave boards through parallel D-Sub interconnects. This type of design is common in industrial automation, motion control, and equipment control systems where centralized logic needs to distribute commands or data to multiple downstream modules simultaneously. The specific ELG designation and AMC manufacturer association suggest use in specialized OEM equipment — replacement boards of this type are typically sought by maintenance engineers or equipment rebuilders working on the original host system. The multi-connector layout and custom pentagonal form factor indicate it was designed to mount inside a specific proprietary enclosure or chassis.