Description
Woodward 9905-463
Technical Specifications
- Output Type: Form C (SPDT) relay contacts.
- Contact Rating: High-current contacts for direct load driving.
- Channel Count: Multiple independent relay channels.
- Backplane Interface: Seamless communication with MicroNet CPU.
Functional Features
- High-Capacity Switching: Capable of driving solenoids, contactors, and alarms directly.
- Programmable Logic: Each relay can be assigned to specific control or alarm functions.
- State Monitoring: Real-time feedback of relay contact status.
- Safety Integration: Can be configured for critical safety trip functions.
Application Scenarios
Used in turbine control panels for alarm annunciation, equipment control, and safety system interfacing.
Performance Parameters
- Contact Life: High mechanical and electrical cycle life.
- Response Time: Fast relay actuation and dropout times.
Material Composition
Industrial relays with silver-alloy contacts, mounted on a conformal-coated PCB.
Structural Characteristics
- Form Factor: Plug-in MicroNet expansion module.
- Wiring: Screw terminal blocks for field connections.
Working Principle
The MicroNet controller sends logic commands via the backplane. The 9905-463 module energizes the corresponding relay coils, closing or opening the contacts to control external field devices.
Installation Requirements
- Ensure proper backplane seating.
- Use appropriately sized wire for relay contact loads.
- Provide flyback diodes for inductive loads.
Usage Precautions
- Do not exceed the relay contact current/voltage ratings.
- Verify relay logic assignments before commissioning.
- Test relay operation during scheduled maintenance.
