GE IS200TDBTH2A | Mark VIe Simplex Single-Channel Digital IO Terminal Board

I. Model Interpretation

IS200: Prefix for the Mark VIe Terminal Board Series

TDBT = Terminal Discrete Board (Switch Quantity Terminal Board)

H2 = Hardware Type, TDBTH2A is the base version, the suffix ACD/ACC is the modified compatible model (the IS200TDBTH2ACD you previously checked is this board's modification), all pins are fully compatible and can be directly interchanged.

Simplex single-channel non-TMR redundancy, different from the IS200TDBTH6A with TMR three-redundancy

Electrical and Hardware Parameters

Power Supply: System DC28V, single channel rated 0.81A, total board power consumption ≈ 2W

Channel Configuration: 32 channels of mixed DI + DO

DI Passive Contact Points / 24VDC Active Input: Valve position feedback, local pressure/temperature switch, auxiliary machine interlock contacts

DO Relay Passive Contact Output: Solenoid valve, on-site indicator light, small contactor

Structure: Double-row green barrier terminal blocks, onboard each channel independent PTC self-recovery fuse, single-channel short circuit does not damage the entire board; multi-core socket in the middle, vertical connection to the IS220PDIOH1A IO Pack card above

Installation: Standard DIN rail / fixed installation in cabinet frame

Environment: Working temperature -30℃ to +65℃, with three-proof coating, universal for power plant, refining unit control cabinets

Net weight ≈ 1.3kg, size 215×110×32mm

Core Functions

On-site Hardwired Intermediate Transfer: Local cable connection terminal, line connection to PDIO main control card, isolating on-site interference, facilitating on-site line inspection, disconnection, and maintenance

Switch Quantity Collection + Drive: Auxiliary oil pump, cooling fan, vent valve, bypass valve, DI collection for local interlocks; relay output for solenoid valves, alarm circuits

Single-channel Control Architecture: No X/Y/Z three-redundancy voting, only used in non-primary protection auxiliary machine IO cabinets, the main trip protection circuit uses TDBTH6 (TMR three-redundancy version)

Accessories and Distinction from Similar Models Table

Model Architecture Applicable Scenarios

IS200TDBTH2A/2ACD Simplex Single Channel Auxiliary equipment ordinary DI/DO (lubrication station, cooling system)

IS200TDBTH6A/6ACD TMR Three Redundancy Unit main protection, ETS trip circuit (critical interlock)

IS200TDBSH2A Simplified 16-point Terminal Board Local control cabinet with few points

The only paired upper card: IS220PDIOH1A (Programmable Digital IO Card), one card paired with one TDBTH2A base plate

Application Industries

GE 9E/9FA/6FA Heavy-duty Gas Turbine and Steam Turbine Units, DEH, Combined Cycle Power Station, Large-scale Centrifugal Compressor Units in Oil and Gas Plants, Mark VIe Control System for Auxiliary Equipment of the Unit.