Description

The IS220PSVOH1B is a servo control module manufactured by General Electric as part of the Mark VIe Series for industrial turbine and automation systems. This specialized I/O pack establishes an electrical interface between one or two distributed I/O Ethernet networks and a compatible servo terminal board. Designed to manage precision position loops, the module processes multiple feedback signals, including eight Linear Variable Differential Transformer (LVDT) inputs and two pulse rate inputs, while handling two servo valve current outputs. When paired with an adjacent WSVO servo driver module, it controls two servo valve position loops, supporting up to five servo valve output currents spanning 10 to 120 mA dc alongside LVDT excitation supply. For local maintenance and status tracking, the hardware incorporates diagnostic LEDs directly on its face and includes an infrared port configured for local serial communications.

Features

• Connects one or two I/O Ethernet networks directly to a servo terminal board
• Handles dual servo valve current outputs for precise actuator positioning
• Processes up to eight dedicated Linear Variable Differential Transformer inputs
• Accommodates two pulse rate inputs for speed or frequency monitoring
• Cooperates with an adjacent WSVO servo driver module for advanced position loop configurations
• Delivers standard internal excitation voltage to power external LVDT sensors
• Features a full conformal base coating to defend internal circuitry against environmental contaminants
• Includes front-facing status LEDs to indicate active network connections and hardware faults
• Integrates an infrared port for non-contact local diagnostic serial communication

Applications

• Gas and steam turbine servo valve positioning
• Electro-hydraulic actuator loop control
• Heavy industrial power generation systems
• Distributed Control Systems (DCS) requiring closed-loop speed and position monitoring

Technical Specifications

Connections/Interfaces

Installation Guidelines

• Terminal Board Interfacing: The module must connect directly to a compatible TSVO servo terminal board, specifically mating with the TSVOH1B terminal board connector via the built-in DC-62 pin connector.
• Network Verification: Connect the network lines using the dual RJ45 Ethernet ports. A green LED on the face of the unit will illuminate to signal a valid, verified Ethernet connection.
• Power Provisioning: Ensure that 28 V dc external power is appropriately routed and supplied through the host terminal board, as the module draws operating power through its primary mating connector.
• Driver Module Proximity: For multi-loop setups requiring up to 5 servo valve output currents (10-120 mA dc), ensure the adjacent WSVO servo driver module is properly mounted next to the I/O pack.