1. Product Overview

Core Functions

• Provides 8 independently isolated, software-configurable analog outputs (voltage/current dual mode)

• Integrates 16-bit DAC, per-channel current feedback monitoring and channel-level fault diagnostics

• Natively supports Mark VIe TMR (Triple Modular Redundant) architecture, hot-swappable for online maintenance

• Serves as the electrical interface between I/O Ethernet networks and field analog output terminal boards, with integrated processor and dedicated acquisition circuitry

2. Key Technical Specifications

1. Output Specifications

• Number of Channels: 8 Independently Isolated Outputs

• Output Type (Software Configurable):

  • Voltage Mode: ±10 VDC, load impedance ≥2 kΩ

  • Current Mode: 4–20 mA (0–20 mA compatible), load impedance ≤750 Ω (max 900 Ω)

• Resolution: 16-bit Digital-to-Analog Converter (DAC)

• Accuracy: ±0.1% FS (Full Scale, typical at 25°C), ±0.5% FS over -30~65°C full temperature range

• Channel Isolation: >500 Vrms electrical isolation between channels, anti-interference, prevents single-point fault propagation

• Response Time: Step response <2 ms, meets fast load regulation requirements for gas turbines

• Output Enable: Each channel has a mechanical normally-open relay for independent output circuit isolation

2. Communication & Interfaces

• Communication: Dual RJ45 Ethernet ports, connects to Mark VIe I/O network, supports redundant communication

• Power Input: 3-pin DC power connector, nominal 28 VDC (27.4–28.6 VDC), power consumption ≤18W

• Physical Connection: DC-37 pin connector mates with terminal base 363A4940CSP5, providing field wiring, fuse protection and circuit terminals

3. Environmental & Reliability

• Operating Temperature: -30°C to +70°C; Storage Temperature: -40°C to +85°C

• Protection Rating: IP20 (for installation in control cabinets)

• Certifications: CE, UL 61010-1, IEC 61326, IEEE C37.90

• Redundancy: Native TMR triple redundancy, three parallel modules output, voting/median selection, eliminates single-point failure risk

• Hot-Swappable: Supported, online replacement without system shutdown

• Diagnostics: Power-on self-test, power supply monitoring, hardware ID verification, output current feedback comparison, relay status monitoring, LED status indication

4. Physical Dimensions

• Submodule (IS220PAOCH1A): 8.26 cm × 4.19 cm × 12.1 cm (H × W × D)

• Mounting: Plugs into Mark VIe TBOS/TBAS I/O rack terminal base

3. Key Features & Benefits

1. Native TMR Redundancy Compatibility: Designed for Mark VIe triple modular redundancy, three independent outputs with hardware voting, ensuring zero single-point failure risk for safety-critical fuel control loops.

2. Dual-Mode Flexible Output: Single card supports software switching between ±10V (servo valves) and 4–20mA (electric actuators), reducing spare parts inventory and simplifying system configuration.

3. High Precision & Fast Response: ±0.1% full-scale accuracy and <2ms step response, precisely matching dynamic control needs for fast load ramping, anti-surge and speed regulation in gas turbines.

4. Channel Isolation & Diagnostics: 500Vrms channel isolation, per-channel independent current feedback, open/short/overload diagnostics, real-time monitoring via ToolboxST software for early fault warning.

5. Hot-Swappable & Industrial-Grade Reliability: Online maintenance capability, wide temperature operation, strong EMI immunity, suitable for harsh industrial environments in power plants and oil & gas stations.

4. Typical Applications

• Gas Turbine Control: 9E/9F/7HA heavy-duty gas turbines, driving Fuel Control Valves (FCV), Inlet Guide Vanes (IGV), anti-surge valves, and emission control valves.

• Oil & Gas Compressor Units: LNG liquefaction, long-distance pipeline compressors, controlling anti-surge, speed regulation and refrigerant flow.

• Combined Cycle Power Plants & Industrial Power Units: Precise control of servo actuators and process control valves.