GE DS200TCDAH1B DS200TCDAH1BHD I/O Control PC Board

The GE DS200TCDAH1B DS200TCDAH1BHD digital I/O control board manages discrete signals for Mark V systems. This board handles all digital inputs from field devices and outputs to actuators. You will find this I/O board in turbine control cabinets and auxiliary panels. Its high-density design packs 32 channels into a single slot.

Digital I/O Architecture

This digital control board provides sixteen optically isolated input channels. Consequently, it reads limit switches, push buttons, and relay contacts reliably. The GE DS200TCDAH1B DS200TCDAH1BHD also includes sixteen open-collector output channels. Moreover, each output channel features an LED status indicator. You can monitor field device states directly from the board.

Technical Specifications

Parameter	Value
Input Channels	16, opto-isolated, 24V DC
Input Voltage Range	10-30V DC (24V DC nominal)
Input Current	5 mA typical at 24V DC
Input Response Time	5 ms maximum
Output Channels	16, open-collector, 24V DC
Output Current	0.5A per channel continuous
Output Response Time	2 ms maximum
Dimensions	220mm x 160mm x 30mm
Weight	0.62 kg (1.37 lbs)
PCB Layers	6
Onboard Components	16 optocouplers, 16 drivers, 32 LEDs, 16 suppression diodes
Connector Count	3 (field I/O, backplane, status)
Status Indicators	32 LEDs (16 input, 16 output status)
Energy Storage	1000 µF (input filtering capacitance)
Isolation Voltage	1500V (field side to logic side)
Output Protection	Short circuit, overcurrent (self-resetting)
Operating Temperature	0°C to +50°C
Storage Temperature	-20°C to +70°C

Input Filtering and Output Protection

The unit includes debounce filters on all input channels. Therefore, it rejects contact bounce from mechanical switches and relays. This board replaces the DS200TCDAH1BHD version without any configuration changes. Simply remove the old board and install this one. GE designed this I/O board for single-slot installation. Hence, it fits directly into existing Mark V rack positions.

Six PCB layers separate field wiring traces from logic circuits effectively. Three connectors handle all field, backplane, and status signals. The GE DS200TCDAH1B DS200TCDAH1BHD includes suppression diodes across each output channel. Accordingly, it protects the board from inductive load kickback. This feature proves essential for driving solenoids and contactor coils.

Status Monitoring and Installation Guide

Each output includes self-resetting overcurrent protection at 0.7A. A short circuit will temporarily disable the affected channel only. The GE DS200TCDAH1B DS200TCDAH1BHD works with all GE Mark V control systems. Always use shielded cable for input wiring longer than 30 meters. Thirty-two LEDs provide immediate visual feedback for every channel.

The board accepts 24V DC power from the backplane. No external power supply is required for operation. The GE DS200TCDAH1B DS200TCDAH1BHD delivers reliable digital I/O control for turbine systems. Installation requires only a screwdriver for field wiring connections. This board operates in non-condensing environments with adequate airflow.