GE IS200VRTDH1DAB VRTD VME‑Bus RTD Temperature Processor Board

Description

Hardware & Electrical Specifications

• Model：IS200VRTDH1DAB
• Part Number：IS200VRTDH1DAB
• Module Type：VRTD VME‑Bus RTD Temperature Processor Board
• Mounting：6U single‑slot VME rack backplane installation inside control cabinet
• Power supply：+5 VDC, ±12 VDC powered via VME backplane; power consumption ＜12 W
• RTD input channels：16 configurable RTD input channels; support PT100 / PT1000; 2‑wire, 3‑wire, 4‑wire sensor wiring configurable via terminal board
• Excitation current：10 mA multiplexed excitation current for each RTD channel
• Max allowable lead resistance：15 Ω per channel
• Scan rate：Fast scan 40 ms (25 Hz); normal scan 100 ms per module
• ADC resolution：16‑bit high‑resolution analog‑to‑digital conversion
• Voltage input span：0.3532 V ~ 4.054 V; common‑mode voltage range 5 V
• Interface：VME backplane bus connector; multi‑pin front‑panel cable connectors for TRTD / IRTD / DRTD terminal board interconnection
• PCB treatment：AB‑revision conformal coated for dust‑moisture‑corrosion resistance, optimized thermal performance for long‑term turbine‑hall operation
• On‑board protection：ESD protection, MOV surge suppression, RTD open‑circuit / short‑circuit fault detection, over‑range signal monitoring, watchdog self‑monitor circuit; faulty channel auto‑remove from scan list, auto‑reinstate after fault clears (20 s delay)
• Compatibility note：Cannot run standalone; must match Mark VI TRTD / IRTD / DRTD terminal boards; full temperature‑loop simulation test mandatory after replacement.

Environmental Specifications

• Operating temperature：‑20 ℃ ~ +65 ℃
• 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 0.55 kg
• Dimension：280 mm × 160 mm × 25 mm
• Handling note：ESD‑sensitive PCB; high‑precision weak‑signal temperature‑measurement circuit, anti‑static wrist‑strap mandatory during handling
• Terminal tightening torque：0.6‑1.0 N·m

Main Functions

1. Provide multiplexed 10 mA excitation current for field RTD sensors connected via TRTD terminal board, collect resistance‑variant temperature signals.
2. Complete analog signal conditioning, filtering and high‑precision A‑D conversion, output digital temperature values to main controller through VME backplane bus and VCMI communication board.
3. Built‑in channel fault diagnosis: detect RTD open‑circuit, short‑circuit and signal over‑range; automatically isolate faulty channel without affecting other working channels; auto‑restore scanning after fault condition disappears (20 s timer).
4. Real‑time temperature trending data for turbine condition monitoring, provide temperature alarm source for protection logic.
5. On‑board self‑diagnosis: detect VME‑bus communication abnormality, watchdog timeout, internal power supply anomaly; upload fault alarm to turbine main controller.
6. LED status indication:
   • Green LED：Board power supply normal
   • Yellow LED：VME‑bus communication active
   • Red LED：RTD‑channel fault / module failure 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. Insert board into designated VME slot, secure panel locking screws; ensure all multi‑pin cable connectors fully locked without loose contact.
3. Field RTD sensor wiring strictly follow GE Speedtronic Mark VI wiring manual; RTD signal cables adopt shielded twisted‑pair, 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 VME rack power status, check each‑channel temperature reading, simulate sensor open/short‑circuit fault condition before commissioning.
6. Replacement note: For TMR triple‑redundant system application, hardware consistency of related VRTD boards shall be verified; full temperature‑loop simulation test mandatory before unit put‑into‑service.