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GE IS200TBTCH1C
Product Name: GE Mark VIe Thermocouple Input Terminal Board (TBTC)
Product Introduction: The IS200TBTCH1C is a thermocouple input terminal board in the GE Mark VIe Speedtronic platform. It performs cold-junction compensation, isolation and filtering on field thermocouple or low-level millivolt signals and transmits them over the IONet high-speed bus to the upper TMR controller, providing high-precision sampling for gas/steam turbine exhaust temperature, inter-stage temperature and steam temperature critical measurement points.
Detailed content
Technical Specifications:
- Input channels: 24 differential analog inputs supporting T, S, K, J, E, N, R, B thermocouples as well as ±100 mV low-level signals
- Cold-junction compensation: On-board thermistor, error ≤ 0.5 °C
- Input impedance: >10 MΩ // 100 pF
- Isolation: 1500 Vrms channel-to-system; 500 Vrms channel-to-channel
- Connectors: Two DC-type connectors (37-pin), hot-swappable
- Scan cycle: ≤ 50 ms typical, synchronized with Mark VIe I/O pack
- Communication: Backplane IONet 100 Mbps, TMR three-redundancy supported
- Compatibility: Simplex application type; used with PTCC I/O packs
- Operating temperature: -40 °C to +70 °C
- Mounting: 6U Eurocard rail, front wiring, hot-swappable
- Dimensions: ≈ 160 × 100 × 20 mm
- Weight: ≈ 0.15 kg
Functional Features: High-precision cold-junction compensation via on-board thermistor directly coupled to the terminal copper bar, keeping error ≤ 0.5 °C across the full temperature range. On-board EEPROM records calibration coefficients and wire-break counts; IONet uploads health status to HMI in real time for predictive maintenance.
Application Scenarios: 9E/9F-class gas turbines, large compressor units, marine propulsion systems requiring high-precision temperature control and protection. Thermocouple inputs can be grounded or ungrounded, located up to 984 ft from the turbine control panel.
Usage Notes: When used with a PTCCH2 board in simplex systems, the board can accept an additional three thermocouple inputs labeled R, B and N. The attached I/O processor performs A/D linearization and conversion for individual thermocouple inputs. Cold junctions operate in a range of -22 °F to 149 °F and are available for monitoring.
