IS200TBCIS3C - Contact Input with Group Isolation Terminal Board

IS200TBCIS3C - Contact Input with Group Isolation Terminal Board IS200TBCIS3C - Contact Input with Group Isolation Terminal Board

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Part Number: IS200TBCIS3C
Manufacturer: General Electric
Series: Mark VI
Product Type: Contact Input with Group Isolation Terminal Board
Number of channels: 24
Voltage Range: 14 to 32 V dc
Mounting: DIN-rail mounting
Technology: Surface mount
Operating temperature: 0 to 60°C
Size: 33.02 cm high x 10.16 cm
Repair: 3-7 Day
Availability: In Stock
Country of Origin: United States
Manual: GEH-6421M


IS200TBCIS3C is a Contact Input with a Group Isolation Terminal Board manufactured and designed by General Electric as part of the Mark VI Series used in GE Speedtronic Gas Turbine Control Systems. The Contact Input with Group Isolation (TBCI) terminal board accepts 24 dry contact inputs wired to two barrier-type terminal blocks. DC power is wired to TBCI for contact excitation. The contact inputs have noise suppression circuitry to protect against surge and high-frequency noise. In the Mark* VI system, TBCI works with VTCC/VCRC and supports simplex and TMR applications. Cables with molded plugs connect TBCI to the VME rack where the VCCC or VCRC processor board is located. Both board versions TBCIH_B and TBCIH_C work correctly with Mark VI and are functionally identical.


Connect the wires for the 24 dry contact inputs directly to two I/O terminal blocks on the terminal board. These blocks are held down with two screws and can be unplugged from the board for maintenance. Each block has 24 terminals accepting up to #12 AWG wires. A shield terminal strip attached to the chassis ground is located immediately to the left of each terminal block. In a simplex system, connect TBCI to the I/O processor using connector JR1. In a TMR system, connect TBCI to the I/O processors using connectors JR1, JS1, and JT1. Cables or I/O packs are plugged in depending on the type of Mark VI or Mark VIe system, and the level of redundancy.


Filters reduce high-frequency noise and suppress surgeon each input near the point of signal entry. The dry contact inputs on H1 are powered from a floating 125 V dc (100-145 V dc) supply from the turbine control. The 125 V dc bus is currently limited in the power distribution module before feeding each contact input. H2 and H3 versions use lower voltages as shown in the specification table. The discrete input voltage signals pass to the I/O processor, which sends them through optical isolators providing group isolation and transferring the signals to the system controller. The reference voltage in the isolation circuits sets a transition threshold that is equal to 50% of the applied floating power supply voltage. The tracking is clamped to go no less than 13% of the nominal rated supply voltage to force all contacts to indicate open when the voltage dips below this level.

WOC has the largest stock of GE Speedtronic Control System Replacement Parts. We can also repair your faulty boards. WORLD OF CONTROLS can also supply unused and rebuilt backed-up with a warranty. Our team of experts is available round the clock to support your OEM needs. Our team of experts at WOC is happy to assist you with any of your automation requirements. For pricing and availability on any parts and repairs, kindly get in touch with our team by phone or email.


What is a contact input with a group isolation terminal board?

A contact input with a group isolation terminal board is a device used in electrical systems to isolate groups of contacts for safety and convenience. It allows for the organization and management of multiple input contacts while providing isolation to prevent interference between groups.

How does a contact input with a group isolation terminal board work?

The terminal board features multiple terminals arranged in groups, each group typically corresponding to a specific function or circuit. Contacts from various sources are connected to these terminals, and isolation barriers separate the groups to prevent electrical interference. This setup ensures that signals from one group do not affect signals in another group, enhancing system reliability.

Where are contact inputs with group isolation terminal boards commonly used?

These terminal boards are often utilized in industrial automation, control systems, and electrical panels where multiple input signals need to be managed and isolated. They can be found in manufacturing plants, power distribution facilities, and process control environments.