Basic Information

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

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

• Product Type: Analog Output Core Processing PCB, Core Circuit Board for PAOC Analog Output I/O Pack, Internal Core Component of IS230STAOH2A Terminal Board

• Compatible Systems/Components: Mark VIe/Mark VIeS Control Systems, must be paired with IS220PAOCH1B Analog Output I/O Pack and IS230STAOH2A Terminal Faceplate to form a complete 8‑channel analog output link, does not support TMR redundancy

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

• Function: Serves as the core analog output signal processing unit for the Mark VIe Simplex system, performing 16‑bit D/A conversion, signal isolation, driving, protection and backplane communication, converting controller digital commands into standard 4–20mA / 0–10V analog signals to drive control valves, servo valves, speed governors and other actuators, acting as the core signal processing unit of the analog output link.

Product Overview

Core Functions

1. 8 Isolated Analog Output Processing: 8 independent electrically isolated channels, supporting 4–20mA current and 0–10V voltage output (software configurable per channel), suitable for analog loads such as control valves, servo valves, speed governors and actuators.

2. High‑Precision D/A Conversion: 16‑bit resolution D/A conversion, accuracy ±0.1% FS (Full Scale), linearity ≤±0.02% FS, response time ≤10ms, meeting high‑precision closed‑loop control requirements for turbine speed regulation, fuel control and steam pressure regulation.

3. Comprehensive Signal Protection & Isolation: 2500Vrms electrical isolation between channels / field‑system side, blocking ground loops and common‑mode interference; built‑in short‑circuit protection, overload protection, reverse polarity protection, MOV surge suppression and EMI filtering to protect 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 indicators (PWR/COM/FAULT) for real‑time operation/fault status feedback, enabling fast fault location with system diagnosis.

6. Backplane Communication Integration: High‑speed backplane connectors for connection to the Mark VIe I/O rack, communicating with the IS220PAOCH1B analog output I/O pack and controller to receive digital commands, output analog signals and upload status.

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, signal type configurable per channel via software

• Output Signals: Current 4–20mA (load ≤600Ω), 0–20mA; Voltage 0–10V (load ≥10kΩ), 0–5V

• Resolution/Accuracy: 16‑bit D/A; Accuracy ±0.1% FS; Linearity ≤±0.02% FS; Response time ≤10ms

• Isolation Voltage: 2500Vrms between channels / field‑system side, CMRR ≥120dB@60Hz

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

• Fail‑Safe Modes: Hold / Zero / Pre‑set Value, configurable via software

• Interfaces: Backplane connectors (connect to Mark VIe rack / IS220PAOCH1B), internal connectors (connect to IS230STAOH2A terminal faceplate), status LED indicators

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

• 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

• Form Factor: Standard Mark VIe PCB, fits Simplex system I/O rack single slot; Dimensions approx. 220mm × 160mm; Weight approx. 0.85kg; Assembly: Used with IS230STAOH2A terminal faceplate and IS220PAOCH1B

• Certifications: CE, UL, Class I Div 2 (hazardous location approved); Architecture: Simplex (non‑TMR redundant)

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 core board replacement, field actuator control loop retrofits

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