Configured for high-precision thermocouple signal acquisition in Mark VI control networks, the General Electric IS200VTCCH1CBB (IS200VTCCH1C Thermocouple Input Board) provides direct physical signal processing for temperature-sensing loops.
Suffix Breakdown & Model Matrix
The IS200VTCCH1CBB serves as the specific revision of the base IS200VTCCH1C platform. The suffix "BB" indicates the hardware build version utilized for standard thermocouple input processing within the Mark VI control architecture.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | IS200VTCCH1CBB |
| Brand | General Electric |
| Origin | USA |
| Weight | 0.5 kg |
| Dimensions | 8.26 x 4.19 x 12.1 cm |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 12 W |
| Input Type | Thermocouple (J, K, T, E, R, S) |
4-20 mA HART Loop Protocol
The IS200VTCCH1CBB facilitates analog front-end processing for field temperature instrumentation. While primarily dedicated to thermocouple millivolt inputs, the board maintains signal integrity through high-impedance input channels designed to interface with control loops. Channel-to-channel isolation is maintained to prevent common-mode noise from affecting thermocouple mV potential, ensuring cold junction compensation (CJC) accuracy across the interface.
Frequently Asked Questions
Q: Does the IS200VTCCH1CBB support hot-swapping while the Mark VI controller is active?
A: No, module removal or installation must be performed only after the rack power is isolated to prevent damage to the backplane communication pins.
Q: Is external cold junction compensation required for this board?
A: No, the board includes integrated CJC circuitry on the terminal block assembly, which compensates for ambient temperature variations at the point of wire termination.
Field Installation Guidelines
- Confirm the control cabinet is de-energized before mounting the IS200VTCCH1CBB into the VME rack slot.
- Ensure the thermocouple extension wires are connected using appropriate polarity; reversing the polarity will result in erroneous temperature readings or negative-going values.
- Verify that the shield drain wire for the thermocouple cable is terminated only at the designated chassis ground point to avoid ground loops.
- Secure the board using the front-panel captive screws to ensure a solid connection between the board ground plane and the rack chassis.
- Post-installation, perform a channel-level calibration check using a precision thermocouple simulator to verify signal conversion accuracy before enabling loop control.
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