IS230STTCH4A - Simplex Thermocouple Input Terminal Board

IS230STTCH4A - Simplex Thermocouple Input Terminal Board IS230STTCH4A - Simplex Thermocouple Input Terminal Board

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SPECIFICATIONS:

Part Number: IS230STTCH4A
Manufacturer: General Electric
Series: Mark VI
Product Type: Simplex Thermocouple Input Terminal Board
Number of channels: 12
Input span, transmitters: 1-5 V dc
Technology: Surface Mount
Size: 10.16 cm wide x 33.02 cm
Common Mode Voltage Range: ±5 V
Operating temperature: 30 to 65 °C
No.of Analog Voltage Inputs: 6
Repair: 3-7 Day
Weight: 2.00 lbs
Availability: In Stock
Country of Origin: United States
Manual: GEH-6721D

FUNCTIONAL DESCRIPTION:

IS230STTCH4A is a Simplex Thermocouple Input Terminal Board manufactured and designed by General Electric as part of the VI Series used in GE Speedtronic Gas Turbine Control Systems. The STTC terminal board is a compact terminal board designed for DIN-rail or flat mounting. The board has 12 thermocouple inputs and connects to either the PTCC thermocouple processor board on the Mark VIe or VTCC thermocouple processor board on the Mark VI. The onboard signal conditioning and cold junction reference are identical to those on the larger TBTC board. High-density Euro-Block type terminal blocks are mounted to the board, and two types are available. An on-board ID chip identifies the board to the processor for system diagnostic purposes. In the Mark VI systems, the VTCC board works with STTC. A single cable with a DC-37 pin connector connects STTC to the VME rack where the VTTC is located. This cable is identical to those used on the larger TBTC terminal board. Two STTC boards can be connected to the VTCC to give a total of 24 thermocouple inputs.

INSTALLATION:

The Signal Temperature Transmitter Controller (STTC) and a plastic insulator are mounted on a sheet metal carrier, which is designed to be attached to a DIN rail. Alternatively, the STTC and insulator can be mounted directly onto a sheet metal assembly that bolts into a panel. The thermocouples are wired directly to the terminal block using standard #18 AWG wires. The terminal block used is of the Euro-Block type, which has 42 terminals that can either be fixed or removable, offering flexibility in how the system is connected. Two different types of Euro-Block terminal blocks are available, likely differing in features such as connection methods or ease of maintenance.

  • Terminal board STTCH1 has a permanently mounted terminal block with 42 terminals.
  • Terminal board STTCH2 has a right-angle header accepting a range of commercially available plugged terminal blocks, with a total of 42 terminals.

OPERATION:

The Signal Temperature Transmitter Controller (STTC) is connected to an I/O pack or board that contains an Analog-to-Digital (A/D) converter. This connection facilitates the conversion of analog signals from various sensors, such as thermocouples, into digital signals for further processing. The I/O pack also provides excitation for the cold junction (CJ) reference, which is crucial for accurate temperature measurement. Thermocouples measure temperature by generating a small voltage, but to ensure the readings are accurate, the temperature at the connection point (the cold junction) must be accounted for. The I/O pack supplies the necessary reference voltage for this compensation. In addition to the 12 thermocouple signals, the cold junction signal and the connection to an identity chip (ID), which likely stores system configuration data, are transmitted through connector JA1.

WOC has the largest stock of GE Speedtronic gas turbine control system replacement parts. We can also repair your faulty boards and supply unused and rebuilt boards 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.

FREQUENTLY ASKED QUESTIONS:

What is the Simplex Thermocouple Input Terminal Board?

The Simplex Thermocouple Input Terminal Board is a device used for connecting multiple thermocouples to a measurement or control system. It provides a convenient interface for monitoring temperature using thermocouple sensors.

How is the STTC mounted in the system?

The STTC and its plastic insulator are mounted on a sheet metal carrier that attaches to a DIN rail. Alternatively, it can be mounted directly onto a sheet metal assembly that bolts into a panel.

How many thermocouples can be connected to the Simplex Terminal Board?

The number of thermocouples that can be connected varies depending on the model of the terminal board. Some boards may support just a few thermocouples, while others may support dozens.

How does the system compensate for the cold junction temperature?

The I/O pack provides excitation for the cold junction (CJ) reference, which helps compensate for the temperature at the thermocouple connection point. This compensation is necessary to ensure accurate temperature readings.