Description
Woodward 9907-995
Technical Specifications
- Function: Signal conditioning, isolation, and distribution.
- Input/Output: Multiple isolated analog and discrete channels.
- Isolation: High dielectric strength galvanic isolation between channels and ground.
- Power Supply: Standard industrial DC supply with reverse polarity protection.
Functional Features
- Signal Isolation: Eliminates ground loops and protects sensitive control electronics from voltage transients.
- Signal Conversion: Converts various field signal levels to standardized controller-compatible signals.
- Fan-Out Capability: Distributes a single input signal to multiple destinations without signal degradation.
- Fault Tolerance: Continues to operate safely even if one channel experiences a short or open circuit.
Application Scenarios
Used in turbine control panels, generator paralleling switchgear, and distributed control systems (DCS) to interface field devices with central controllers.
Performance Parameters
- Isolation Voltage: High-voltage isolation rating for maximum safety and noise immunity.
- Signal Accuracy: High-precision signal reproduction with minimal offset and gain error.
- Response Time: Fast signal tracking with negligible phase lag.
Material Composition
High-reliability electronic components on a conformal-coated PCB, enclosed in a protective industrial housing.
Structural Characteristics
- Mounting: DIN rail or panel mount compatible.
- Wiring: Clearly labeled screw terminals or plug-in connectors for easy field wiring.
- Indicators: Per-channel status LEDs for signal presence and fault indication.
Working Principle
The module receives raw field signals, applies galvanic isolation through internal transformers or opto-isolators, and conditions the signal to the required specification. It then outputs the clean, isolated signal to the destination device, ensuring electrical separation between different parts of the control system.
Installation Requirements
- Install in a clean, dry location with adequate ventilation.
- Use properly sized and shielded wiring for all field connections.
- Ensure a solid equipment ground connection.
Usage Precautions
- Verify signal types and ranges before connecting field devices.
- Do not exceed the maximum voltage or current ratings of any channel.
- Check terminal tightness periodically to prevent intermittent connections.
