GE A16B-2200-0431/01A Remote I/O Motherboard

This remote I/O motherboard acts as the backbone for distributed automation systems. It connects multiple I/O modules to a single remote base. You will use this board in CNC machines or PLC remote racks for signal aggregation.

Key Technical Specifications

Parameter	Details
Model Number	A16B-2200-0431/01A
Brand	GE (General Electric)
Category	Remote I/O Motherboard / Backplane
Dimensions (W x H x D)	320 mm x 180 mm x 2.5 mm
Weight	850 grams
Slot Count	9 expansion slots (16-pin each)
Onboard Energy Storage	4 x 1000 µF capacitors (4000 µF total)
Component Count	178 discrete components
Bus Architecture	Parallel backplane bus, 8-bit data width
Connector Type	Each slot: shrouded header with keying
Power Distribution	24V DC and 5V DC rails on board

Physical Layout and Slot Configuration

The motherboard measures 320 mm in width and 180 mm in height. Its PCB thickness reaches 2.5 mm for enhanced rigidity under vibration. The unit weighs 850 grams, reflecting the heavy copper traces. Nine expansion slots accept any compatible remote I/O module in any position. Each slot uses a 16-pin shrouded header with polarization keying.

Internal Circuitry and Energy Storage

One hundred seventy-eight components populate this multi-layer backplane board. Four 1000 µF capacitors create a total energy storage of 4000 µF. This capacitor bank filters power rail noise from the external supply. Consequently, each slot receives clean 5V and 24V DC power simultaneously. The board also includes series termination resistors for signal integrity on long cable runs.

Bus Communication and Signal Routing

An 8-bit parallel backplane bus handles all data transfers between modules. The motherboard routes address, data, and control lines across all nine slots. You can install analog, digital, or specialty modules without any configuration jumpers. Therefore, this design simplifies field replacement and system expansion greatly. A single 50-pin flat ribbon connector links this motherboard to the main controller.

Power Distribution and Protection

The board accepts a 24V DC input and regulates it down to 5V locally. Each slot has individual current limiting to prevent a single fault from crashing the bus. Furthermore, the motherboard includes reverse polarity protection on the main input terminal. Thermal fuses will disconnect power if the board exceeds 85°C unexpectedly.