GE IS200TDBTH6ABC TDBT TMR‑Capable Discrete‑Input / Transistor‑Output Terminal Board

Description

Hardware & Electrical Specifications

• Model：IS200TDBTH6ABC
• Part Number：IS200TDBTH6ABC
• Module Type：TDBT TMR‑Capable Discrete‑Input / Transistor‑Output Terminal Board
• Mounting：DIN‑rail or cabinet panel mounting inside turbine control cabinet
• Power supply：+24 V DC auxiliary power supplied by PADC I/O pack
• Input channels：24 optically‑isolated discrete input channels; support dry‑contact / 24‑125 VDC wet‑contact mode configurable by on‑board jumpers
• Output channels：6‑channel NPN sink‑type transistor outputs, organized into 3 redundant channel‑pairs for TMR voting trip logic; 5‑30 VDC load voltage, max 100 mA per channel
• Isolation：Opto‑coupler galvanic isolation, isolation rating 1500 V DC
• Response time：Input ≤1 ms; transistor output ≤0.8 μs for safety trip commands
• Interface：Barrier screw terminal blocks for field wiring; three IDC ribbon‑cable connectors for PADC I/O pack interconnection
• PCB treatment：Conformal coated for dust‑moisture‑corrosion resistance
• On‑board protection：ESD protection, MOV surge suppression, over‑current limiting for each output channel
• Compatibility note：Cannot run standalone; must match PADC I/O pack; TMR system requires three identical TDBT boards; full‑channel input‑output simulation test mandatory after replacement.

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 1.30 kg
• Dimension：330 mm × 178 mm × 55 mm
• Handling note：ESD‑sensitive PCB; high‑speed safety‑output circuit, anti‑static wrist‑strap mandatory during handling
• Recommended wire cross‑section：0.75‑2.5 mm² shielded twisted‑pair copper cable for field‑contact and actuator wiring
• Terminal tightening torque：0.6‑1.0 N·m

Main Functions

1. Screw‑terminal field termination for discrete status signals: breaker auxiliary contacts, valve limit switches, pump‑fan running feedback, safety interlock contact signals; transistor output drives field solenoid valves and safety trip‑circuit loads.
2. Optical galvanic isolation between plant field wiring and control logic side, suppress ground‑loop noise and industrial surge interference.
3. Convert contact open‑close status into digital logic and send to PADC I/O pack; receive trip/control commands from I/O pack and drive on‑board sink‑type transistor outputs for turbine protection voting‑logic processing.
4. Per‑channel over‑current limiting protection prevents field short‑circuit damage to I/O pack internal circuits.
5. On‑board channel self‑diagnosis: detect field‑loop open‑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 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 mounting bracket firmly; ensure three IDC ribbon‑cable connectors fully locked without loose contact.
3. Restore on‑board jumper configuration (dry‑contact / wet‑contact voltage mode) strictly consistent with original settings before field wiring.
4. Safety‑related signal wiring strictly follow GE Speedtronic wiring manual; adopt shielded twisted‑pair cables, strictly separated from high‑power cables; connect shielding to dedicated ground terminal.
5. Complete protective grounding according to GE Speedtronic system specification.
6. After replacement: verify ribbon‑cable link status, test each input‑channel open‑close response and each transistor‑output driving capability, validate turbine safety‑trip‑logic response before commissioning.
7. Replacement note: For TMR triple‑redundant safety‑loop application, three‑set TDBT hardware consistency must be verified; full safety‑signal input‑output simulation test mandatory after swap.