GE IS200VAICH1DAB VAIC VME‑Bus Analog Input‑Output Processor Board

Description

Hardware & Electrical Specifications

• Model：IS200VAICH1DAB
• Part Number：IS200VAICH1DAB
• Module Type：VAIC VME‑Bus Analog Input‑Output Processor Board
• Mounting：6U VME rack backplane installation inside control cabinet
• Power supply：+5 VDC, ±15 VDC powered via VME backplane; 24 VDC field auxiliary power from terminal board
• Analog input：20 differential analog input channels; signal types: 4‑20 mA, 0‑20 mA, ±10 VDC jumper configurable
• Analog output：4‑channel configurable output; 4‑20 mA / 0‑200 mA selectable; max load resistance up to 800 Ω
• A‑D / D‑A conversion：16‑bit ADC resolution; 10 ms scan cycle (100 Hz) for turbine process loop
• Common‑mode rejection：AC CMR ≥60 dB@60 Hz; DC CMR ≥80 dB
• Interface：VME backplane bus interface; multi‑pin ribbon‑cable connectors for TBAIH1C / STAI terminal board interconnection
• PCB treatment：Conformal coated for dust‑moisture‑corrosion resistance
• On‑board protection：ESD protection, MOV surge suppression, channel over‑voltage / over‑current limiting, open‑circuit detection for input/output channels, fault‑safety suicide relay for analog outputs
• Compatibility note：Cannot run standalone; must match Mark VI TBAIH1C or STAI terminal board; full analog‑loop simulation test mandatory after replacement.

Environmental Specifications

• Operating temperature：‑20 ℃ ~ +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 0.65 kg
• Dimension：260 mm × 180 mm × 25 mm
• Handling note：ESD‑sensitive PCB; high‑precision analog circuit, anti‑static wrist‑strap mandatory during handling
• Terminal tightening torque：0.6‑1.0 N·m

Main Functions

1. Receive field analog signals transmitted from TBAIH1C / STAI terminal boards, including pressure transmitters, flow transmitters, temperature‑related analog transducers and other process 4‑20 mA / voltage signals.
2. Complete analog‑to‑digital conversion, signal scaling and filtering, transmit digital process data to main controller via VME bus.
3. Convert digital control commands from main rack into analog current output signals, drive field analog actuators or positioning devices.
4. Built‑in suicide relay cuts off analog outputs when critical board fault occurs, improving system safety.
5. Per‑channel self‑diagnosis: detect input over‑range, output over‑load, channel open‑circuit fault, ribbon‑cable link failure; upload fault alarm to turbine main controller.
6. LED status indication:
   • Green LED：Board power supply normal
   • Yellow LED：VME bus and ribbon‑cable link communication active
   • Red LED：Analog‑channel fault / link‑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 ribbon‑cable connectors fully locked without loose contact.
3. Field analog wiring strictly follow GE Speedtronic Mark VI wiring manual; analog 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 analog input reading, test every analog output channel performance before commissioning.
6. Replacement note: For TMR triple‑redundant system application, hardware consistency of related packs shall be verified; full analog‑loop simulation test mandatory before unit put‑into‑service.