I/O modules

Core Function of This Terminal Board

The GE IS200TBTCH1BBB connects directly to temperature sensors in turbine systems. This terminal board accepts up to 12 independent thermocouple inputs. It provides cold junction compensation for accurate temperature readings. Consequently, the module delivers reliable exhaust and bearing temperature data.

Physical Dimensions and Board Layout

This terminal board measures 285 mm in total length. Its width reaches 195 mm for a standard PCB form factor. The board thickness stands at 20 mm including connector heights. You will find 245 discrete components on this fiberglass substrate. These include precision resistors, thermocouple amplifiers, and isolation circuits. The GE IS200TBTCH1BBB weighs approximately 510 grams for secure mounting.

Input Channels and Sensor Compatibility

This board accepts J, K, T, and E type thermocouple inputs. Each channel includes a dedicated differential amplifier for noise rejection. Furthermore, the board provides a built-in thermistor for cold junction reference. This reference compensates for temperature variations at the terminal block. The module can sample all 12 channels within 100 milliseconds.

Signal Conditioning and Accuracy Specifications

The GE IS200TBTCH1BBB achieves 16-bit resolution on every input channel. Each channel provides an input impedance greater than 10 megohms. The board includes low-pass filtering to remove high-frequency interference. Common mode rejection reaches 120 dB at 50 or 60 Hz. The total measurement accuracy stays within ±0.1% of full scale.

Connector Types and Wiring Details

Two 24-pin latching headers connect this board to the main controller. Additionally, three 8-pin terminal blocks accept field thermocouple wiring. Each terminal accepts wire gauges from 0.2 to 1.5 mm². The board also provides a dedicated shield terminal for each input pair. Gold-plated contacts resist corrosion in high-humidity environments.

Energy Storage and Power Requirements

The GE IS200TBTCH1BBB draws 120 mA from a 5 V DC logic supply. It also requires 40 mA from a separate 24 V DC field supply. The board incorporates two 47 µF tantalum capacitors for input filtering. However, these capacitors do not retain any user calibration data. Total stored energy remains below 0.05 joules at nominal voltage.

Installation and Compatibility Notes

You must mount this board near the turbine thermocouple junction boxes. Always use extension-grade thermocouple wire for field connections. Then, verify that each shield connects only at the board end. The module works exclusively with Mark VIe controller VME racks. Regular calibration every 12 months maintains specified accuracy.

Details