GE Control Mark V IS220PSVOH1B RTD Terminal BoardDescription The IS220PSVOH1B is a servo interface I O pack developed by GE as part of the Mark VIe control systems. This I O pack serves as an electrical interface that connects one or two I O Ethernet networks to a TSVO servo terminal board. It manages two servo valve position loops using the WSVO servo driver module. The front faceplate of the PSVO includes various LED indicators for status monitoring. Specifications Part No.: IS220PSVOH1B