Woodward 5461-650 T/C Input Board

The Woodward 5461-650 T/C Input Board offers a reliable interface for precise temperature monitoring and control in various industrial applications. By supporting both J and K-type thermocouples, this module ensures accurate temperature measurements through advanced compensation for cold junction temperature variations. Though this product is no longer in production, availability can still be confirmed through WOC.

Key Features

Efficient Temperature Monitoring
This board processes input from thermocouples and ambient temperature sensors to provide precise temperature readings. By using an integrated AD592 ambient temperature sensor, the module performs cold junction compensation in software, ensuring accuracy even under fluctuating conditions.
Versatile Configuration
- Users can select between fail-high and fail-low configurations by adjusting jumpers on the module. This flexibility ensures stable operation by maintaining a specific signal during open-input scenarios.
- Input deviation alarms notify users of any discrepancies in input channel readings, helping to identify calibration issues or transducer malfunctions.
Seamless Communication
- The module integrates with control systems via three card edge connectors (P1, P2, P3).
- Connector P1 links to the Controlway and power supply, while P2 and P3 facilitate communication between primary and backup process control units.
- A transceiver module transmits data to the LINKnet controller for network-wide communication.
Robust Signal Processing
Each input channel uses a voltage-to-frequency converter to transform analog voltage signals into frequency signals. The module processor calculates these frequencies into counts, enabling precise temperature data transmission.
User-Friendly Installation
- Terminals 20 (+) and 21 (-) connect to actuator wires with shielded cables. Terminal 22 connects the shield to ensure signal integrity.
- Speed adjustments can be made using a remote Speed Trim potentiometer, providing up to a 5% adjustment range with recommended 100 Ω potentiometers.

Troubleshooting Capabilities

The module detects and alerts users of input deviations beyond the configured “Max Deviation” setting, typically set to 1% of the input range.
It supports software-based diagnostics to maintain accurate operation even when certain input channels experience faults.

Specifications

Attribute	Details
Part Number	5461-650
Input Impedance	2.0 MΩ
Power Supply Input Range	18–32 Vdc
Power Required	2.4 W at 24 Vdc
Network to I/O Channel	277 Vac
PS Input to I/O Channel	500 Vdc
Operating Voltage	277 Vac
Country of Manufacture	United States (USA)

Applications

The Woodward 5461-650 T/C Input Board is widely used in industries requiring precise temperature control. Its compatibility with LINKnet controllers and ability to process J and K-type thermocouples make it a critical component in industrial automation and energy systems.

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