I/O modules

This digital contact terminal board manages discrete field signals for GE Mark V systems. It provides a centralized connection point for limit switches and proximity sensors. You will use this board to simplify wiring in turbine control cabinets.

Key Technical Specifications

Physical Layout and Cabinet Mounting

This terminal board measures 300 mm in width and 180 mm in height. Its depth reaches 40 mm for standard panel mounting. The unit weighs 1.1 kilograms for straightforward backplate installation. Four M5 mounting holes secure the board to a cabinet surface vertically.

Internal Circuitry and Energy Storage

One hundred eighty-six components populate this digital contact interface board. Four 680 µF capacitors form a 2720 µF total energy storage bank. This bank filters the 24V supply for reliable contact sensing. Consequently, the board rejects electrical noise from long field cable runs. Each input includes a debounce circuit for mechanical switch contacts.

Input Configuration and Contact Sensing

Twenty-four channels accept dry contact closures or 24V DC signals. An 8 ms debounce filter eliminates false triggers from contact bounce. Green LEDs illuminate when each input channel detects a closed contact. You can wire normally open or normally closed contacts without configuration changes. Removable terminal blocks accept wires from 0.5 mm² to 2.5 mm² cross-section.

Output Configuration and Relay Ratings

Sixteen relay outputs drive small loads or interlock with other systems. Each relay uses a 24V DC coil controlled by the Mark V processor. The contacts handle 2 amps at 250V AC for pilot lamps and solenoids. They also switch 2 amps at 30V DC for PLC input modules. Red LEDs show the energized state of each output relay clearly.

Control Interface and Compatibility

Two 50-pin ribbon connectors link the board to the Mark V controller. Five removable 20-pin terminal blocks organize field wiring by signal type. Both DS200DTBAG1A DS200DTBAG1AAA share identical electrical specifications. The AAA suffix indicates a later revision with enhanced labeling. You can use either version interchangeably in any Mark V system.

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