IS200TBTCH1B GE MKVI, Thermocouple Terminal Board

Description:

The IS200TBTCH1B is a Thermocouple Input Terminal Board that is manufactured and designed by General Electric as part of the Mark VI Series. It is used in GE Speedtronic Turbine Control Systems. The Thermocouple Input (TBTC) terminal board can accept 24-type E, J, K, S, or T thermocouple inputs. It can also accept additional B, N, and R types of thermocouple inputs when used with PTCCH2 in Mark VIe. These inputs are wired to two barrier-type blocks on the terminal board. TBTC communicates with the I/O processor through DC-type connectors. 

There are two types of TBTC available:
TBTCH1C for simplex applications has two DC-type connectors.
TBTCH1B for TMR applications has six DC-type connectors.

In the Mark VI system, TBTC works with the VTCC processor and supports simplex and TMR applications. One TBTCH1C connects to the VTCC with two cables. In TMR systems, TBTCH1B connects to three VTCC boards with six cables.

INSTALLATION:Connect the thermocouple wires directly to the two I/O terminal blocks. These removable blocks are mounted on the terminal board and held down with two screws. Each block has 24 terminals accepting up to #12 AWG wires. A shield terminal strip attached to the chassis ground is located on the left side of each terminal block. In Mark VI systems, cable the TBTC J-type connectors to the I/O processors in the VME rack.

OPERATION:The 24 thermocouple inputs can be grounded or ungrounded. They can be located up to 300 m (984 ft) from the turbine control panel with a maximum two-way cable resistance of 450 Ω. TBTC features high-frequency noise suppression and two CJ reference devices. The I/O processor performs the analog-to-digital conversion and linearization for individual thermocouple types. In Mark VI simplex systems using TBTCH1C, one VTCC is used. In Mark VIe simplex systems, two PTCC packs plug into TBTC, obtaining 24 thermocouple inputs. For TMR systems using TBTCH1B, the thermocouple signals fan out to three J-connectors. The Mark VI system accommodates 24 inputs and the Mark VIe system accommodates 12 inputs. The TBTC terminal board supports all thermocouple spans documented for the associated thermocouple I/O processor.

Datasheet Link:

IS200TBCIH2C GE MKVI, Terminal Board PDF Datasheet