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IS200STCIH2ADD - Simplex Contact Input Terminal Board is available in stock which ships the same day.
IS200STCIH2ADD - Simplex Contact Input Terminal Board comes in UNUSED as well as REBUILT condition.
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TECHNICAL SPECIFICATIONS:
Part Number: IS200STCIH2ADD
Manufacturer: General Electric
Series: Mark VIe
Functional Designation: Simplex Contact Input Terminal Board (STCI)
Number of Channels: 24 dry contact voltage input channels
Excitation Voltage (H2/S2): Nominal 24 V dc,
Input Current (H2/S2): First 21 circuits draw 2.5 mA
Input Filter: Hardware filter, 4 ms
AC Voltage Rejection: 12 V rms at 24 V dc excitation
Fault Detection: Loss of contact input excitation voltage
Size: 15.9 cm high x 10.2 cm wide (6.25 in x 4.0 in)
Temperature: -30 to 65�C (-22 to 149�F)
Technology: Surface-mount
Availability: In Stock
Manual: GEH-6721_VOL_II V
FUNCTIONAL DESCRIPTION:
IS200STCIH2ADD is a Simplex Contact Input Terminal Board manufactured and designed by General Electric as part of the Mark VIe Series used in GE Distributed Turbine Control Systems. The Simplex Contact Input (STCI) terminal board is a compact contact input terminal board designed for DIN-rail or flat mounting. The STCI board accepts 24 contact inputs that are supplied with a nominal 24, 48, and 125 V dc excitation from an external source. The contact inputs have noise suppression to protect against surges and high-frequency noise.
COMPATIBILITY:
The PDIA I/O pack is the primary interface for the STCIH2ADD terminal board. It establishes a direct physical connection by plugging into the high-density D-type connector. Once seated, the I/O pack facilitates high-speed data transmission, communicating directly with the system controller over an Ethernet network. It is important to note that the STCI is specifically engineered for simplex systems; it does not support dual or triple modular redundant (TMR) configurations.
INSTALLATION:
The STCIH2ADD is designed for flexible industrial mounting. The standard installation involves the board and a plastic insulator mounting onto a sheet metal carrier, which is then snapped onto a standard DIN rail. For alternative setups, the assembly can be mounted onto a sheet metal base that bolts directly into a control cabinet. Wiring for the 24 contact inputs is routed directly to the terminal blocks. While the board features 52 terminal inputs in total to accommodate various wiring needs, it is recommended to use #18 AWG wires for typical connections. To ensure signal integrity and minimize electromagnetic interference, all cable shields should be properly terminated on a separate grounding bracket rather than the terminal block itself.
OPERATION:
The STCIH2ADD mirrors the function and on-board signal conditioning found on the TBCI (Turbine Contact Input) board. This consistency across the Mark VIe series allows for streamlined troubleshooting and improved system familiarity for technicians. The board utilizes a precise sensing logic where the threshold voltage is set at exactly 50% of the excitation voltage to ensure accurate state detection. To handle varying environmental and electrical conditions, each input path includes dedicated hardware filters with a 4 ms time constant to suppress high-frequency noise and protect the system from voltage surges. In specific hardware variants such as the STCIH8A, the contact input section is further equipped with a current limit resistor on every wetting voltage output, providing a critical layer of protection against external short circuits. Furthermore, the system actively monitors the external excitation source, ensuring that any significant drop or total loss in voltage is immediately flagged as a fault to maintain operational safety and reliability.
WHY BUY FROM WOC:
World of Controls is a specialized global authority in the lifecycle extension of GE Mark VIe ecosystems, providing the IS200STCIH2ADD in both UNUSED and REBUILT conditions to eliminate operational latency. Our quality-assurance protocol involves comprehensive parametric testing, wetting current verification, and dielectric integrity assessments. By partnering with WOC, you secure hardware for peak performance, reinforced by 24/7 technical consultation and accelerated global logistics to keep your plant operational and efficient.
What is GE IS200STCIH2ADD?
The IS200STCIH2ADD is a Simplex Contact Input Terminal Board (STCI) used in the GE Mark VIe Distributed Control system. It provides 24 discrete dry contact input channels for monitoring field-side switches and sensors.
Can this board be used with 125 VDC field contacts?
Yes. The board is jumper-selectable and can support either 24 VDC or 125 VDC excitation voltages for field contact wetting.
Does the STCI board support fanning to multiple I/O packs?
No, the STCI is a Simplex board with a single connector (JR1). For fanned or TMR applications, a different terminal board configuration is typically required.
How does the hardware-based 4 ms filter affect signal processing?
The 4 ms input filter constant provides essential hardware-level debounce and noise attenuation. This prevents high-frequency electrical noise or contact chatter from being interpreted as legitimate state changes by the control logic.
What is the benefit of the 1500 V RMS isolation rating?
The 1500 V RMS group isolation rating provides a robust safety barrier that prevents field-side electrical faults from propagating back to the control system's digital backplane, ensuring higher overall system availability.
