GE IS200STAOH2AAA STAO Simplex Analog‑Output Terminal Board

Description

Hardware & Electrical Specifications

• Model：IS200STAOH2AAA
• Part Number：IS200STAOH2AAA
• Module Type：STAO Simplex Analog‑Output Terminal Board
• Mounting：DIN‑rail or flat panel mounting inside turbine control cabinet
• Power supply：+24 V DC auxiliary power supplied by PAOC I/O pack
• Output channels：8 galvanic‑isolated analog output channels, signal range 0‑20 mA (4‑20 mA default application)
• Max load resistance：900 Ω per channel
• Resolution：16‑bit DAC, full‑scale accuracy ±0.5%
• Interface：Screw terminal blocks for field actuator wiring; high‑density IDC ribbon‑cable connector connecting to PAOC I/O pack
• PCB treatment：Conformal coated for dust‑moisture‑corrosion resistance
• On‑board protection：ESD protection, surge suppression, short‑circuit current‑limiting for each output channel
• Compatibility note：Cannot run standalone; must match PAOC analog‑output I/O pack; full‑channel output calibration test required after replacement; simplex‑only hardware for non‑safety critical loop without single‑module fault tolerance。

Environmental Specifications

• Operating temperature：‑30 ℃ ~ +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 0.56 kg
• Dimension：178 mm × 159 mm × 50 mm
• Handling note：ESD‑sensitive PCB, anti‑static wrist‑strap mandatory during handling
• Recommended wire cross‑section：0.75‑2.5 mm² shielded twisted‑pair copper cable for actuator signal wiring
• Terminal tightening torque：0.6‑1.0 N·m

Main Functions

1. Screw‑terminal field termination for turbine analog control outputs: fuel valve, inlet guide vane, bypass valve actuator 4‑20 mA control signals.
2. Receive digital set‑point commands from PAOC I/O pack, convert into stable analog current output to drive field actuators.
3. Per‑channel short‑circuit current‑limit protection, avoid single‑loop fault damaging I/O pack internal circuit.
4. On‑board surge suppression for long‑distance field wiring under high‑EMI power‑plant environment.
5. Channel self‑diagnosis: detect output loop 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 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 connector fully locked without loose contact.
3. Field actuator wiring strictly follow GE Speedtronic wiring manual; analog output cables must 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 ribbon‑cable link status, calibrate each analog‑output channel, validate actuator position response before commissioning.
6. Replacement note: TMR redundant system requires three‑set STAO channel consistency verification; full‑function analog‑output test mandatory after swap.