SPECIFICATIONS
Part Number: 5466-268
Manufacturer: Woodward
Product type: Speed Sensor/Driver Module
Number of channels: 4
Update time: 5 ms
Availability: In Stock
Country of Manufacture: United States (USA)
Functional Description
5466-268 is a Speed Sensor/Driver Module developed by Woodward. As a speed sensor, it captures real-time data on the speed, providing valuable information to control systems and operators. This data is crucial for monitoring performance, ensuring safety, and optimizing efficiency in various applications.
Features
- When integrating a speed sensor input channel into a system, there are specific considerations and requirements for wiring and setting the latch setpoints to ensure accurate and reliable operation. Depending on whether the speed sensor input channel is wired as an MPU or a proximity probe input, certain configurations must be followed. Additionally, setting appropriate latch setpoints is crucial for detecting input faults effectively.
- Wiring as MPU or Proximity Probe Input: When a speed sensor input channel is wired as either an MPU or a proximity probe input, it is essential to ensure that the unused input is appropriately jumpered at the FTM (Fault Tolerant Module) or control unit. This jumpering process is necessary to prevent interference and signal issues that may arise due to the unused input channel.
For example, if the channel is wired as an MPU input, the proximity probe input should be jumpered, and vice versa. This practice ensures that the system is correctly configured and eliminates any potential cross-talk or signal conflicts between the two input types.
- Jumpering When an Input Channel is Not Used: When an input channel is not used at all, such as when there is no requirement for either an MPU or a proximity probe input, it is crucial to jumper both the MPU and Prox inputs at the FTM or control unit. By doing so, the system is shielded from any stray signals or electromagnetic interference that might otherwise impact its overall performance.
- Latch Setpoint Configuration: In the application software, a high and low latch setpoint can be defined to detect input faults effectively. These setpoints act as thresholds for determining if the sensor input is within the expected range or if a fault condition has occurred.
- Specifically, the low latch setpoint must be set to a value greater than one fiftieth (1/50) of the frequency range. This requirement ensures that the low latch setpoint is sufficiently higher than the noise level or potential variations in the sensor input. By setting the threshold above this minimum threshold, false alarms and unreliable fault detection can be minimized, and the system can accurately identify genuine input faults.
Speed sensor input troubleshoot
If a speed sensor input is not functioning properly, verify the following:
- Check Cable Shielding and Grounding: Ensure that the cable connecting the speed sensor is shielded properly, and the shield is adequately grounded to prevent interference.
- Measure Input Voltage: Using a voltmeter, measure the input voltage on the terminal block. The voltage should fall within the range of 3.5 to 32 Vpeak to ensure proper functioning.
- Verify Clean Signal Waveform: Inspect the signal waveform from the speed sensor to ensure it is clean and does not exhibit double zero crossings, which can indicate signal irregularities.
- Check for Absence of 60 Hz Signal: Verify that there are no ground connections leading to a 60 Hz signal, as this could indicate grounding or interference issues.
- Measure Frequency Range: Measure the frequency of the speed sensor input, which should be within the range of 0.5 Hz to 25 kHz, indicating normal operation.
- Inspect Wiring Connections: Check the wiring for loose connections at the terminal blocks, disconnected or misconnected cables, missing jumpers on the terminal block, or blown fuses on the 24 Vdc circuit in the FTM.
- Verify Software Configuration: Ensure that the software configuration for the speed sensor input is set up correctly to match the system requirements.
- Check Fuses on FTM and Other Modules: Inspect the fuse on the FTM, following the instructions and fuse locations provided. If other channels on the MPU and Analog I/O module are also not working, check the fuses on those modules. Replace any blown fuses with others of the same type and rating after resolving any wiring issues.
- Validate Individual Input Readings: Examine the individual inputs into each kernel. The software should display three separate numbers-one from each MPU and Analog I/O module. These numbers should generally be within 0.1% of each other unless a high common mode voltage is present.
- Jumper Unused MPU/Prox Inputs: Ensure that any unused MPU/Prox inputs are jumpered to eliminate potential signal interference and maintain proper system performance.
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Frequently Asked Questions
What is 5466-268?
It is an Speed Sensor/Driver Module developed by Woodward.
Why is jumpering important when wiring the speed sensor input channel as an MPU or a proximity probe input?
Jumpering the unused input channel is crucial to prevent interference and signal conflicts between the two input types. If the channel is wired as an MPU input, the proximity probe input should be jumpered, and vice versa. This ensures proper configuration and optimal performance of the system.
What should be done when the speed sensor input channel is not used at all?
When the input channel is not used (neither MPU nor proximity probe input is required), it is essential to jumper both the MPU and Prox inputs at the FTM or control unit. This prevents any stray signals or electromagnetic interference from affecting the system's overall performance.
Why are latch setpoints necessary in the application software?
Latch setpoints define thresholds for detecting input faults effectively. They allow the system to determine if the sensor input is within the expected range or if a fault condition has occurred. This helps in early fault detection and ensures reliable operation of the system.
