Product Description

Overview
The IS220PSVOH1A is a high-performance servo control I/O module designed for GE Mark VIe and Mark VIeS turbine control systems. It serves as the interface between one or two IONet (Ethernet) networks and TSVO servo terminal boards, enabling precise regulation of steam or gas turbine valves. The module ensures reliable, closed-loop position control, supporting safe and efficient turbine operation.

System Integration
Compatible with both standard and safety-rated Mark VIe systems, the IS220PSVOH1A integrates seamlessly with WSVO servo driver modules to manage up to two independent valve position loops. Its dual-board architecture combines a universal processor board with a dedicated servo acquisition board for enhanced performance.

Key Features

High-Precision Control

• Delivers stable current output between 10–120 mA DC for precise valve positioning

• Supports LVDT and LVIT feedback for accurate stroke monitoring and control

• Maintains tight closed-loop stability under varying operational loads

Redundant Network Connectivity

• Dual Ethernet ports (ENet1 and ENet2) allow simultaneous connection to primary and backup networks

• Ensures continuous turbine control even in the event of a single network failure

Diagnostics & Testing

• Front-panel LEDs indicate Power, Fault (Attention), Ethernet status, and Enable signals

• Supports actuator stroking, step current, and position ramping for performance verification

• Trend monitoring captures anomalies in actuator response for predictive maintenance

Auto-Reconfiguration

• Automatic firmware and configuration loading when replacing the module

• Manual reconfiguration available through ToolboxST if terminal boards are replaced

Industrial Reliability

• Operates in temperatures from -30°C to +65°C (-22°F to 149°F)

• Surface-mount technology ensures vibration and thermal resistance

• Integrated local power supply, flash memory, and RAM support high-performance operation

Applications

• Steam and gas turbine control systems

• Closed-loop valve actuation for precise fuel and steam regulation

• High-reliability industrial power generation environments

Technical Specifications

FAQ

Q: What is the primary function of the IS220PSVOH1A?
A: It serves as a servo control I/O pack for Mark VIe systems, connecting TSVO boards to Ethernet networks and enabling precise turbine valve regulation.

Q: How many servo loops can it control?
A: Up to two independent valve position loops via the WSVO driver module.

Q: Can it auto-configure when replaced?
A: Yes, auto-reconfiguration is supported, but manual setup is required if terminal boards are changed.

Q: What environments is it suitable for?
A: Industrial turbine control applications operating in temperatures from -30°C to +65°C with high vibration and thermal loads.