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General Electric IS400TBCIH2C Contact input terminal block
The IS400TBCIH2C is a 24-channel group-isolated dry contact input terminal board (TBCI = Terminal Board Contact Input with Group Isolation) for the GE Speedtronic Mark VIe TMR platform. It is compatible with Triple Redundancy (TMR) systems, featuring 24 dry contacts divided into two isolated groups, supporting 24 VDC excitation, 4ms hardware filtering, and multiple protections. It is primarily designed for high-reliability discrete signal acquisition and TMR system deployment scenarios in industries such as turbines, power plants, and petrochemicals.
Core Hardware and Interfaces
Terminals and Connections: 24 dry contact inputs; 2 sets of isolated barrier terminal blocks; 3 DC-37 pin connectors (JR1/JS1/JT1, corresponding to the TMR R/S/T channels); 1 3-position 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), two independent common terminals; current limiting of 2.5 mA for the first 21 channels, and 10 mA for channels 22–24; 4 ms hardware filtering + TVS surge protection + PTC resettable fuse, resisting 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 casing, 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: IS400TBCIH2C (TBCI 24-channel grouped isolated contact input terminal block)
Compatible System: Mark VIe Speedtronic (TMR-based)
Number of Inputs: 24 dry contact inputs, isolated in 2 groups
Excitation Voltage: 24 VDC (16–32 VDC)
Hardware Filtering: 4 ms/channel
Power Consumption: 20.6 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: Inter-group isolation, supports independent TMR channel acquisition
Safety and Redundancy Features:
Group Isolation: 24 channels divided into two independent common terminals, reducing the risk of fault propagation, adaptable to different voltage 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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