GE IS200WNPSH1A +28 TO -28 Pwr Supply Daughter Card

الوصف

The GE IS200WNPSH1A is a Wetting Power Supply Daughter Card for the Mark VI series of GE’s Speedtronic Gas Turbine Control Systems. It provides a specialized, isolated power source to “wet” certain digital input circuits, which is necessary for the control system to accurately read the status of dry contacts.

Key Features and Functionality

The WNPSH1A is a dedicated power supply that plugs into a main I/O card, such as a contact input card, to provide a specific voltage for wetting circuits.

• Isolated Power Supply: The card generates a nominal +28 VDC and -28 VDC isolated power source. This power is used to energize digital inputs from dry contacts (e.g., switches, relay contacts). Isolating this power from the main system power bus prevents electrical noise and ground loops, which could otherwise interfere with the control system’s sensitive electronics.
• “Wetting” Function: The term “wetting” refers to the act of applying a voltage to a dry contact circuit. A dry contact is a simple switch that doesn’t have its own power source. By applying a voltage with the WNPSH1A, the control system can detect whether the contact is open (no voltage) or closed (voltage present), effectively converting a mechanical status into a readable digital signal.
• Daughter Board Design: The IS200WNPSH1A is designed as a small daughter board that plugs directly into a compatible main VME I/O card. This modular design provides flexibility, allowing the system to be configured for a variety of digital input types as needed.

Technical Specifications