Basic Information

• Model: IS230STAOH2A (STAOH: Analog Output Terminal Board), Core PCB: IS200STAOH2AAA

• Brand & Series: GE Speedtronic Mark VIe / Mark VIeS Turbine Control System, Simplex Architecture

• Product Type: Analog Output Signal Terminal Board, Field Actuator Interface Board, Matching Terminal Unit for PAOC Analog Output I/O Pack

• Compatible Systems: Mark VIe, Mark VIeS Control Systems, paired with IS220PAOCH1B Analog Output I/O Pack, dedicated for Simplex architecture, does not support TMR redundancy

• Country of Origin: USA (GE Salem, VA Facility)

• Function: Serves as the core analog output signal interface for the Mark VIe system, converting digital commands from the controller into standard 4–20mA / 0–10V analog signals to drive field control valves, actuators, speed governors and servo valves for precise process control, providing signal isolation, protection, wiring transfer and fault diagnosis.

Product Overview

Core Functions

1. 8 Isolated Analog Outputs: 8 independent electrically isolated channels, supporting 4–20mA current output and 0–10V voltage output (software switchable), 16‑bit resolution, high output accuracy and good linearity, suitable for analog loads such as control valves, servo valves, speed governors and actuators.

2. High‑Precision Signal Conversion: 16‑bit D/A conversion, fast response, low ripple and low drift, meeting high‑precision closed‑loop control requirements for turbine speed regulation, fuel control and steam pressure regulation.

3. Comprehensive Signal Protection: Channel‑to‑channel electrical isolation (blocks ground loop interference), short‑circuit protection, overload protection, reverse polarity protection, surge suppression and EMI filtering, protecting the module, controller and field equipment safety.

4. Fail‑Safe Mechanism: Supports three safety modes: Fail‑to‑Hold, Fail‑to‑Zero, Fail‑to‑Pre‑set Value, automatically entering the preset safe state in case of communication interruption or module failure to prevent system runaway.

5. Diagnosis & Status Monitoring: Diagnosis for channel wire break, short circuit, overload and power abnormality, LED status indicators for real‑time operation/fault status feedback, enabling fast fault location with system diagnosis.

6. Flexible Installation & Wiring: DIN‑rail / panel mounting, Euro‑style pluggable terminal blocks, compatible with 24–12AWG cables, shield grounding design, simplifying field wiring, maintenance and replacement.

7. Industrial‑Grade Reliable Design: Wide temperature range, anti‑vibration, moisture/dust resistant, conformal coating, UL94 V‑0 flame retardant, suitable for harsh working conditions with strong EMI and hazardous areas, ensuring long‑term stable operation.

Technical Specifications

• Output Channels: 8 independent isolated analog outputs

• Output Signals: 4–20mA (current), 0–10V (voltage), software configurable

• Resolution: 16‑bit D/A conversion

• Accuracy: ±0.1% FS (Full Scale)

• Response Time: ≤10ms

• Isolation Voltage: 500Vrms between channels / field‑system side

• Protection: Short‑circuit protection, overload protection, reverse polarity protection, surge suppression, EMI filtering

• Fail‑Safe Modes: Hold / Zero / Pre‑set

• Interfaces: Euro‑style pluggable terminal blocks (field wiring), D‑type connectors (connect to IS220PAOCH1B I/O pack), status LED indicators

• Power: Internal logic 5VDC (backplane/PAOC power); External auxiliary 24VDC (field side)

• Environment: Operating -30°C to +65°C; Storage -40°C to +85°C; Relative humidity 5%–95% (non‑condensing); Protection: IP20 (cabinet‑mounted), conformal coating, anti‑EMI/anti‑vibration

• Dimensions: Standard Mark VIe terminal board size, DIN‑rail / panel mounting; Weight approx. 0.7kg

• Certifications: CE, UL, Class I Div 2 (hazardous location approved)

• Matching Components: IS220PAOCH1B Analog Output I/O Pack, IS200STAOH2AAA (core PCB), terminal blocks, mounting brackets

Typical Applications

• Driving fuel control valves, steam control valves, speed regulating actuators, servo valves, bypass valves and other analog actuators for Mark VIe/Mark VIeS gas/steam turbine control systems

• Simplex architecture analog control loops for precise closed‑loop control of speed, load, pressure, temperature and flow parameters

• Analog output signal interface for generator sets in combined‑cycle power plants, thermal power plants, petrochemical drive units and offshore platforms

• Legacy Mark VI system upgrades, PAOC analog output I/O pack terminal replacement, field actuator control loop retrofits

• High‑precision analog signal output, signal isolation and Fail‑Safe protection in industrial process control