GE IS200TBCIH1B | Mark VI / Mark VIe Contact Input Terminal Board In Stock

Description

At-A-Glance Executive Brief

• Model: IS200TBCIH1B
• Brand: GE General Electric
• Part Type: TBCI contact input terminal board
• Lifecycle status: Legacy turbine control termination board; stocked for brownfield Mark VI / Mark VIe gas/steam turbine control retrofits
• System compatibility: GE Speedtronic Mark VI and Mark VIe turbine control I/O packs, routes discrete contact status to controller and DCS/SCADA
• Weight: ~0.54 kg

Technical Introduction

Failure of IS200TBCIH1B interrupts dry contact field signal termination for turbine trip switches, limit switches, relay contacts and interlock status signals. Loss of contact status causes controller fault alarms, loss of turbine interlock visibility, and may initiate turbine trip or inhibit startup sequences; status information cannot be passed to the DCS HMI. The GE IS200TBCIH1B (TBCI, Terminal Contact Input) is a dedicated field wiring termination PCB for Mark VI / Mark VIe Speedtronic turbine control systems. It provides screw terminal connection points for multiple dry-contact discrete field inputs from trip switches, valve limit switches, interposing relays and emergency interlock devices. The board conditions and routes contact open/closed state signals via ribbon cable to the Mark VIe I/O processor pack. Hardware input debounce filtering reduces electrical noise and contact bounce false triggering in noisy power station environments. Isolation between field wiring and control logic protects the turbine controller from transients and ground loops. Channel status and board health diagnostics are sent to the turbine controller and mirrored to plant DCS for operator monitoring and asset health tracking. Conformal coated variants are commonly used in turbine cabinets to resist dust, moisture and corrosive contaminants. Combined-cycle, thermal and hydro power plants maintain spare IS200TBCIH1B boards for rapid replacement of field termination hardware during planned outages.

• Best Suited For
  • GE Mark VI / Mark VIe gas and steam turbine control cabinets
  • Dry contact interlock, valve limit switch, trip relay discrete signal termination and conditioning
  • Direct drop-in replacement for existing GE IS200TBCIH1B contact terminal board hardware

Core Technical Specifications

Field Engineer’s Tech Notes

• Confirm board revision, I/O pack compatibility and ribbon cable pinout before replacement; different TBCI revisions are not fully interchangeable.
• This board carries turbine interlock signals. Execute lockout/tagout and apply appropriate SIS bypass before removing the board.
• Check field wiring for ground faults or shorts prior to energizing; wiring faults can damage termination board circuits.
• After replacement, verify all contact input channel states match field device status, validate controller diagnostics and clear fault alarms before removing bypasses.
• ESD protection mandatory while handling exposed PCB.
• Inspect terminal block torque during re-termination; loose terminals cause intermittent contact faults and turbine interlock nuisance trips.

Adaptive QA & Testing Protocol

Each IS200TBCIH1B board is bench tested on Mark VIe I/O test fixture. We verify continuity of all terminal channels, hardware debounce response and contact state detection. Galvanic isolation resistance is measured. Ribbon cable interface communication to I/O pack is validated. PCB, conformal coating and terminal blocks are visually inspected for corrosion, damage and solder joint integrity. Full test reports or bench test video clips are available upon request.

Buyer’s FAQ

Q: What is GE IS200TBCIH1B used for? A: It is a contact input terminal board for GE Mark VI / Mark VIe turbine control systems. It terminates dry contact signals from trip switches, valve limit switches and interlock relays, then sends conditioned discrete status to the turbine controller.

Q: What warranty applies for refurbished and NSFP IS200TBCIH1B? A: Refurbished and NSFP units carry a 12-month hardware warranty. Coverage excludes ESD damage, overvoltage transients, loose wiring termination, field short circuits and incompatible I/O pack installation.

Q: What lead time should I expect? A: Stocked units ship 3–7 business days. If inventory is depleted, lead time increases while we source surplus GE IS200TBCIH1B boards.

Q: Can IS200TBCIH1B be used for 4-20mA analog signals? A: No. This is a dry contact discrete termination board; it is designed only for on/off contact status, not analog process signals.