Description
🔹 Product Description
The GE General Electric IS220PSVOH1A is a PSVO Servo Control I/O Pack used in GE Mark VIe turbine control systems. Although some listings describe it as a servo terminal board, the IS220PSVOH1A is the servo I/O pack that interfaces with a separate TSVO servo terminal board and associated servo driver. It connects to one or two I/O Ethernet networks and supports two servo valve position-control loops, eight LVDT feedback inputs, and two pulse-rate inputs. The module is designed for servo actuator control applications in gas and steam turbine systems.
🔹 Product Datasheet
| Parameter | Value |
|---|---|
| Brand | GE General Electric |
| Model | IS220PSVOH1A |
| Series | Mark VIe / Mark VIeS |
| Product Name | PSVO Servo Control I/O Pack |
| Functional Type | Servo Valve Position Control Module |
| Product Status | New / New Surplus |
| Dimensions | Approx. IS220 special-assembly format; verify actual unit |
| Weight | Approx. 0.4 kg |
| Origin | USA |
| Power | 28 VDC nominal, 27.4–28.6 VDC |
| Discontinued | Legacy product; verify system compatibility |
🔹 Common Questions & Answers
Q: What is the IS220PSVOH1A used for?
A: It provides the electrical interface between I/O Ethernet networks and a TSVO servo terminal board for turbine servo-control applications.
Q: Is the IS220PSVOH1A a servo terminal board?
A: No. It is a servo control I/O pack. The separate TSVO/TSVC terminal board provides the field wiring interface.
Q: How many servo loops does it support?
A: The PSVO system supports two servo valve position-control loops through the associated servo driver.
Q: How many LVDT inputs are available?
A: The module supports eight LVDT winding inputs for position feedback. It also supports two pulse-rate inputs.
Q: What is the nominal power supply?
A: The documented nominal supply is 28 VDC, with a specified range of 27.4 to 28.6 VDC and a maximum current rating of 1.0 A.
Q: What servo output range is supported?
A: The documented servo output specification is -120 to +120 mA DC, with the applicable configuration determining the actual operating output.
Q: Which terminal board is associated with the PSVO pack?
A: The PSVO interfaces with a TSVO/TSVC servo terminal board. GE documentation identifies compatible hardware combinations including IS220PSVOH1A with IS200TSVCH2A and the appropriate servo driver.
Q: How does the module communicate with the control system?
A: It uses two RJ45 Ethernet interfaces, ENET1 and ENET2, for connection to one or two I/O Ethernet networks.
Q: What should be checked before replacement?
A: Verify the complete part number, hardware revision, terminal-board model, servo driver, 28 VDC supply, Ethernet connections, LVDT wiring, and Mark VIe configuration.
Q: What should be checked if a servo valve does not respond correctly?
A: Check module power, Ethernet status, terminal-board connections, servo driver, valve coil, LVDT feedback, pulse-rate inputs, field wiring, and system diagnostics before replacing the I/O pack.
🔹 Recommended GE Models
- IS220PSVOH1B — Servo Control I/O Pack
- IS200TSVCH1A — Servo Terminal Board
- IS200TSVCH2A — Servo Terminal Board
- IS210WSVOH1A — WSVO Servo Driver
- IS410WSVOH1A — WSVO Servo Driver
- IS220PTURH1B — Turbine I/O Module
- IS220PTCCH1A — Thermocouple Input Module
- IS220PRTDH1A — RTD Input Module
- IS220PAICH1A — Analog Input Module
- IS220PAOCH1A — Analog Output I/O Pack
- IS220PDIAH1A — Discrete Input I/O Pack
- IS220PDIOH1A — Discrete I/O Pack
- IS220PPROH1A — Protection I/O Pack
- IS220PGENH1A — Generator I/O Module
- IS220PPDAH1B — Power Distribution I/O Pack
