Description
At-A-Glance Executive Brief
- Model: IS200TBCIH1CBD
- Brand: GE
- Part Type: Speedtronic Mark VI dry contact input terminal board
- Lifecycle status: OEM obsolescent, stocked for power plant gas and steam turbine brownfield installations
- System compatibility: GE Speedtronic Mark VI, mates with PDIA I/O packs
- Weight: 0.72 kg
Technical Introduction
When this terminal board fails, turbine trip interlocks, breaker auxiliary feedback and limit switch status cannot reach the Mark VI controller, potentially locking turbine startup or triggering unplanned trips. This rack-mounted termination PCB provides field wiring landing for 24 dry contact discrete inputs. It routes floating 125VDC excitation to field contact devices and transmits contact state signals via three 37-pin D-Sub connectors back to the PDIA I/O pack. Dual screw terminal blocks simplify field wiring maintenance and troubleshooting. The board physically isolates field cabling from the sensitive core I/O electronics, reducing risk of transient damage to the main control pack. Power generation facilities maintain this spare to reduce forced outage risk while executing legacy Mark VI migration planning.
- Best Suited For
- Mark VI gas and steam turbine control cubicles
- Turbine trip interlock, breaker status and equipment limit switch signal termination
- Direct drop-in replacement for existing IS200TBCIH1 series terminal hardware
Core Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | IS200TBCIH1CBD |
| Platform | GE Speedtronic Mark VI |
| Signal Type | Dry contact discrete inputs |
| Channel Count | 24 channels |
| Excitation Voltage | Floating 125 VDC, operating range 100–145 VDC |
| Termination | Dual screw terminal banks, total 48 terminals |
| Backplane Interconnect | Three × 37-pin D-Sub connectors to PDIA pack |
| Wire Gauge Range | 12–22 AWG |
| Mounting | Chassis rack mount inside Mark VI cabinet |
| Weight | 0.72 kg |
| Environmental Details | Please refer to the OEM datasheet for complete environmental tolerances. |
Field Engineer’s Tech Notes
- Jumper positions define excitation routing. Match jumper configuration exactly to the original board. Incorrect jumper settings cause false contact status readings and turbine interlock trips.
- 125VDC hazardous voltage exists on all field terminals. Perform full lockout/tagout and verify zero energy before disconnecting or re-terminating field wiring.
Adaptive QA & Testing Protocol
Each unit is bench tested on a Mark VI PDIA test fixture. We cycle dry contact closure for all 24 channels and validate accurate status readback at the PDIA I/O pack. We inspect screw terminal integrity and continuity for every D-Sub pin. Insulation resistance testing is completed to identify hidden leakage paths. Full test reports or bench test video clips are available upon request.
Buyer’s FAQ
Q: What does the CBD suffix on IS200TBCIH1CBD mean? A: CBD identifies the PCB artwork and component revision variant within the IS200TBCIH1 family. Always verify full part marking and jumper layout before replacement.
Q: What warranty covers refurbished and NSFP IS200TBCIH1CBD? A: Refurbished and NSFP units carry a 12-month hardware warranty. Coverage excludes damage caused by overvoltage, field wiring shorts, or improper commissioning.
Q: What lead time should I expect? A: Stocked units ship in 3–7 business days. If inventory is depleted, lead time increases while we source surplus Mark VI terminal boards.
Q: Can this board handle analog 4-20mA transmitter signals? A: No, it is built exclusively for dry contact discrete inputs. Select dedicated Mark VI analog termination boards for analog transmitter wiring.
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