GE A16B-2200-0250/05C Axis Board

Technical Specifications and Board Architecture

This axis control board manages servo motor positioning for GE Fanuc CNC systems. The GE A16B-2200-0250/05C processes closed-loop feedback from multiple drive axes. You will find this card inside the main rack of many machining centers. Its multi-layer PCB design ensures reliable high-speed signal transmission. The board weighs approximately 0.52 kilograms. Its dimensions measure 29 cm in length, 18 cm in width, and 2.5 cm in height.

Parameter	Specification
Brand	GE Fanuc Automation
Model	A16B-2200-0250/05C
Category	Axis Control Board / Servo Control Card
Weight	0.52 kg
Length	29 cm
Width	18 cm
Height	2.5 cm
Number of Control Axes	2 axes (simultaneous)
Number of Connectors	3 x 50-pin headers + 1 x 34-pin flat cable
Interface Type	Backplane bus + external encoder inputs
Component Count	12 custom ASICs, 64 logic ICs, 80 capacitors
Memory ICs	4 x 64 KB SRAM, 2 x 256 KB flash ROM
Energy Storage	Local decoupling capacitors (no battery)
Operating Temperature	0°C to 55°C
Storage Temperature	-20°C to 70°C

Processing Capabilities and Axis Control

The board carries multiple custom LSI chips for real-time servo control. Each chip handles position, velocity, and current loops for one axis. You can identify revision /05C printed near the main edge connector. This revision includes updated firmware and improved component layout. The board uses six-layer PCB construction for optimal signal isolation. Consequently, it handles high-frequency encoder signals without cross-talk interference. Gold-plated edge contacts provide reliable connection to the backplane bus.

Feedback and Communication Interfaces

The axis control board accepts differential encoder signals from each servo motor. Each encoder channel supports up to 500 kHz input frequency. The board also connects to external CNC operator panels through a flat ribbon cable. You will find dedicated test points for analog velocity command outputs. These test points allow oscilloscope verification of servo loop performance. The GE A16B-2200-0250/05C communicates with the main CPU over a high-speed backplane. It also sends torque commands to external servo amplifier units.

Installation and Operational Guidelines

You must install this board into a dedicated slot within the CNC main rack. The backplane provides 5V and 12V DC power to the board. The board draws approximately 800 mA from the 5V supply. It stores no user data or axis parameters independently. Therefore, the CNC controller retains all tuning values in separate non-volatile memory. You should inspect the gold edge connector for dirt or oxidation regularly. Clean it with isopropyl alcohol and a soft lint-free cloth.