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General Electric IS400STCIH1A Input terminal block
The IS400STCIH1A is a 16-channel single-point isolated dry contact input terminal board (STCI = Terminal Board Single-Point Isolation Contact Input) for the GE Speedtronic Mark VIe TMR platform. All 16 dry contacts are independently isolated, supporting TMR redundancy, and featuring 4ms hardware filtering. It is primarily designed for high-isolation discrete signal acquisition and high-reliability deployment scenarios in industries such as turbines, power plants, and petrochemicals.
Core Hardware and Interfaces
Terminals and Connections: 16 dry contact inputs; 16 single-point isolated barrier terminal blocks; 3 DC-37 pin connectors (JR1/JS1/JT1, corresponding to the TMR R/S/T channels); 1 3-pin power female connector for excitation power/common terminal; 1 37-pin female D-type connector for direct connection to the VTCC/VCRC I/O processor board.
Signal and Protection: Excitation voltage 24 VDC (wide range 16–32 VDC), independent common terminal for each channel; current limit of 2.5 mA per channel; 4 ms hardware filtering + TVS surge protection + PTC resettable fuse, resistant to contact bounce, EMI, and overvoltage reverse connection.
Mounting and Protection: Standard DIN rail mounting (metal bracket + plastic insulating pad); PCB conformal coating, resistant to moisture, dust, and chemical corrosion; metal housing, natural heat dissipation, fanless; built-in ID identification, module can automatically identify model.
Compatible Systems: Mark VIe Speedtronic; compatible with VTCC/VCRC I/O processor boards; supports single-mode (single connector) and TMR (three connector) deployments.
Email: xmxblynn@163.com
Phone: +86 18059884797
Parameters Values
Model IS400STCIH1A (STCI 16-channel single-point isolated contact input terminal block)
Compatible System Mark VIe Speedtronic (TMR primary)
Number of Inputs 16 dry contact inputs, single-point isolation
Excitation Voltage 24 VDC (16–32 VDC)
Hardware Filtering 4 ms/channel
Power Consumption 18.5 W
Operating Temperature -40°C to +70°C; Storage -40°C to +85°C
Certifications Class 1 Div 2, ATEX, CE, UL; G3 compliant
Mounting Method Standard DIN rail
Isolation Capability Independent isolation for each channel, supports independent acquisition of TMR channels
Safety and Redundancy Features
Single-point isolation: 16 dry contacts, each independently isolated, each with an independent common terminal, greatly reducing the risk of fault propagation, adaptable to different voltages or redundant zone signal acquisition.
TMR Compatibility: Three 37-pin connectors correspond to the TMR's R/S/T channels, meeting the SIL 3 redundancy requirements for turbine control and ensuring independent acquisition and fault isolation for the R/S/T channels.
Diagnostic Capabilities: Supports excitation loss and input no-response diagnostics; LEDs indicate power supply, link, and input status, which can be read via ControlST software.
Hazardous Area Compatibility: Class 1 Div 2/ATEX certified, suitable for use in hazardous area control cabinets, compatible with SIS auxiliary system signal acquisition.
Email: xmxblynn@163.com
Phone: +86 18059884797
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