ABB IS200TBTCH1CBB TBTC Thermocouple Terminal Board

Description

Hardware & Electrical Specifications

• Model：IS200TBTCH1CBB
• Part Number：IS200TBTCH1CBB
• Module Type：TBTC Thermocouple Terminal Board
• Mounting：DIN‑rail bracket installation inside turbine control cabinet
• Power supply：+24 V DC auxiliary power supplied by matched PTCU I/O pack
• Input channels：16 differential isolated thermocouple input channels
• Supported thermocouple：Type J, K, T, E
• Input signal range：‑10 mV ~ +75 mV
• Cold‑junction compensation：On‑board automatic cold‑junction compensation circuit
• Galvanic isolation：500 V AC channel‑to‑backplane isolation rating
• Interface：Barrier screw terminal blocks for field thermocouple wiring; dual high‑density IDC ribbon‑cable connectors connecting to PTCU I/O pack
• PCB treatment：Conformal coated for dust‑moisture‑corrosion resistance
• On‑board protection：ESD protection, surge suppression, EMI RC filter circuit for millivolt‑level weak signal loops
• Compatibility note：Cannot run standalone; must match PTCU thermocouple I/O pack; full‑channel temperature calibration test required after replacement; TMR redundant system needs three‑set hardware consistency verification.

Environmental Specifications

• Operating temperature：‑40 ℃ ~ +70 ℃
• Storage temperature：‑40 ℃ ~ +85 ℃
• Relative humidity：5%‑95% non‑condensing
• Installation location：Indoor turbine control cabinet
• EMC compliance：IEC 61000‑6‑2
• Certifications：CE

Mechanical Data

• Weight：approx 0.52 kg
• Dimension：178 mm × 159 mm × 50 mm
• Handling note：ESD‑sensitive PCB; millivolt‑level weak measuring circuit, anti‑static wrist‑strap mandatory during handling
• Recommended wire cross‑section：0.75‑2.5 mm² shielded twisted‑pair thermocouple extension cable for field sensor wiring
• Terminal tightening torque：0.6‑1.0 N·m

Main Functions

1. Screw‑terminal field termination for turbine thermocouple sensors: exhaust gas temperature, bearing metal temperature, stator winding temperature, lube‑oil temperature signals.
2. On‑board automatic cold‑junction compensation eliminates cold‑end measuring deviation for thermocouple acquisition.
3. Signal filtering and surge protection for long‑distance millivolt‑level weak‑signal field wiring under high‑EMI turbine‑hall environment.
4. Transmit conditioned millivolt signals to PTCU I/O pack via ribbon‑cable link for temperature conversion calculation.
5. On‑board channel fault diagnosis: detect thermocouple open‑circuit / short‑circuit fault, report fault status to main controller.
6. On‑board self‑diagnosis: detect terminal‑board auxiliary power loss and ribbon‑cable link failure.
7. LED status indication:
   • Green LED：Terminal‑board auxiliary power normal
   • Yellow LED：Ribbon‑cable link communication active
   • Red LED：Field‑channel sensor fault / link communication loss alarm

Installation & Wiring Requirements

1. Cut off rack power supply before replacement. Hot‑swap is forbidden. Strict anti‑static protection when handling PCB board.
2. Secure DIN‑rail mounting bracket firmly; ensure IDC ribbon‑cable connectors fully locked without loose contact.
3. Field thermocouple wiring strictly follow GE Speedtronic wiring manual; must adopt dedicated thermocouple extension cable, strictly separated from high‑power cables; connect shielding to dedicated ground terminal.
4. Complete protective grounding according to GE Speedtronic system specification.
5. After replacement: verify ribbon‑cable link status, calibrate each temperature channel reading, validate over‑temperature alarm response before commissioning.
6. Replacement note: For TMR triple‑redundant application, three‑set TBTC channel consistency must be verified; full‑channel thermocouple function test mandatory after swap.