IS200TBTCS1B - Thermocouple Input Terminal Board

IS200TBTCS1B - Thermocouple Input Terminal Board IS200TBTCS1B - Thermocouple Input Terminal Board

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Part Number: IS200TBTCS1B
Manufacturer: General Electric
Series: Mark VI
Product Type: Thermocouple Input Terminal Board
Number of channels: 24
Thermocouple Types: E, J, K, S, T
Span: -8 mV to +45 mV
Power supply voltage: 28 V dc
Voltage Range: 18 - 32 VDC
Mounting: DIN-rail mounting
Technology: Surface mount
Operating temperature: -25 to 70°C
Size: 33.02 cm high x 17.8 cm
Repair: 3-7 Day
Availability: In Stock
Country of Origin: United States
Manual: GEH-6153


IS200TBTCS1B is a Thermocouple Input Terminal Board manufactured and designed by General Electric as part of the Mark VI Series used in GE Speedtronic Gas Turbine Control Systems. Thermocouple inputs of the 24-type E, J, K, S, or T are supported by the Thermocouple Input (TBTC) terminal board. Only when combined with PTCCH2 in Mark VIe does it accept extra inputs from B, N, and R types of thermocouples? Two barrier-type blocks on the terminal board are connected to these inputs through wiring. Using connectors of the DC variety, TBTC interfaces with the I/O processor. The TBTC is available in the following two varieties:

  • TBTCH1C for simplex applications has two DC-type connectors.
  • TBTCH1B for TMR applications has six DC-type connectors.


TBTC collaborates with the VTCC processor and supports simplex and TMR applications in the Mark VI system. Two cables link one TBTCH1C to the VTCC. TBTCH1B is connected to three VTCC boards in TMR systems using six connections.


The two I/O terminal blocks should receive the thermocouple wires directly. Two screws are used to secure these detachable blocks to the terminal board where they are placed. Each block has 24 terminals that can accommodate wires up to #12 AWG. Each terminal block has a shield terminal strip that is connected to the chassis ground. In Mark VI systems, cable the TBTC J-type connectors to the I/O processors in the VME rack.


There are two grounding options for the 24 thermocouple inputs. The distance they can be from the turbine control panel is up to 300 m (984 ft), and the maximum two-way cable resistance is 450. As seen in the following graphic, TBTC includes two CJ reference devices and high-frequency noise reduction. For each type of thermocouple, the analog-to-digital conversion and linearization are carried out by the I/O processor. One VTCC is utilized in Mark VI simplex systems that use TBTCH1C. Two PTCC packs plug into TBTC in Mark VIe simplex systems to obtain 24 thermocouple inputs.

WOC has the largest stock of GE Speedtronic Gas Turbine 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 thermocouple input terminal board?

A thermocouple input terminal board is an electronic device used for interfacing thermocouples with measurement and control systems. It provides a safe and convenient way to connect one or multiple thermocouples to data acquisition or control equipment.

How does a thermocouple input terminal board work?

The thermocouple input terminal board works by receiving the voltage generated by the thermocouple due to the temperature difference between its two junctions. It then conditions and amplifies this voltage signal, making it suitable for accurate measurement or control by data acquisition systems or other instrumentation.

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