Metz Connect Threshold Switch - 110666
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Product Information
Full details
This Metz Connect threshold switch (model 110666) is designed for professionals in electrical systems who need reliable monitoring and control of devices like pumps, fans, and burners. Its key benefit is the precise activation and deactivation of relays based on input voltage thresholds, offering automated control. A minor caveat is its operation is limited to 24V AC/DC systems. Key features include adjustable switch-on voltage, hysteresis, a manual control level, and screw terminal connections.
All features
| Model Part Number | 110666 |
|---|---|
| Brand | Metz Connect |
Extended Product Information
FAQs
What is hysteresis and why is it important?
Hysteresis is the difference between the switch-on and switch-off voltage thresholds. It prevents the relay from rapidly switching on and off when the input voltage hovers around a single set point, which can damage connected devices and the relay itself.
Can this threshold switch be used with mains voltage (e.g., 120V or 240V)?
No, this model is specifically designed for 24V AC/DC input voltage. The relay contacts can switch up to 250V AC, but the input signal and power must be 24V.
How do I adjust the switch-on voltage and hysteresis?
The unit features manual adjustment controls. Refer to the device's markings or the full manual for specific locations and methods of adjustment (typically small potentiometers or dials).
What is the IP rating of this device?
The device has an IP40/IP20 rating. This means it offers protection against solid objects greater than 1mm (IP40) and is protected against touching with a finger (IP20), but offers limited protection against dust and water ingress, requiring installation within an appropriate enclosure.
What type of devices can be controlled by this switch?
It is suitable for controlling devices such as pumps, fans, burners, small motors, lighting circuits, and other electrical loads that can be activated or deactivated based on voltage level changes.
Does the switch come with a manual control level?
Yes, the Metz Connect 110666 features a manual control level that allows for manual override of the relay's state.
What is the operating temperature range?
The operating temperature range is from -10 °C to 50 °C.
Troubleshooting
Relay does not activate when input voltage is applied.
Verify the input voltage is 24V AC/DC and within the set switch-on threshold. Check all wiring connections to the input terminals. Ensure the manual control level is not overriding the automatic function.
Relay activates and deactivates erratically.
Adjust the hysteresis setting to a wider range. Ensure the input voltage signal is stable and not fluctuating rapidly. Check for electrical noise or interference in the wiring.
Device connected to the output is not controlled.
Confirm the input voltage is above the switch-on threshold. Verify the relay wiring is correct (using either normally open or normally closed contacts as intended). Check the output load does not exceed the relay's contact rating (250V AC).
Unit does not power on.
Check the 24V AC/DC power supply connection and ensure it is providing the correct voltage. Inspect the power input terminals for secure connections.
Pros and Cons
Pros
- Precise voltage threshold control for automated systems.
- Adjustable settings for hysteresis and switch-on voltage allow fine-tuning.
- Manual override feature enhances operational flexibility.
- Secure screw terminal connections for reliable installation.
- Compact size for easy integration into control panels.
Cons
- Limited to 24V AC/DC input voltage, not suitable for higher voltage systems.
- IP40/IP20 rating suggests limited protection against dust and water; requires suitable enclosure.
- Relatively narrow operating temperature range (-10 - 50 °C) may limit use in extreme environments.
- Does not include network connectivity or smart features.
Setup, Compatibility & Care
Setup:
- Power Connection: Connect the 24 V AC/DC power supply to the designated input terminals.
- Input Signal: Connect the voltage signal source (e.g., sensor, controller output) to the input terminals.
- Relay Output: Wire the change-over relay contacts (NO/NC) to control the target device (pump, fan, etc.).
- Adjustments: Use the manual controls to set the desired switch-on voltage and hysteresis values according to system requirements.
- Mounting: Mount the unit securely in a suitable enclosure, ensuring it is protected from environmental factors.
Compatibility:
- Input Voltage: Primarily designed for 24 V AC/DC power supplies.
- Output Voltage: The relay contacts can handle up to 250 V AC.
- Enclosure: Due to its IP40/IP20 rating, it should be installed within a control panel or enclosure providing adequate protection against dust and moisture.
Care:
- Cleaning: Disconnect power before cleaning. Wipe the exterior with a dry or slightly damp cloth. Avoid solvents or abrasive cleaners.
- Environment: Operate within the specified temperature range of -10 °C to 50 °C. Ensure proper ventilation if used in enclosed spaces.
- Wiring: Periodically check screw terminal connections for tightness to ensure reliable operation.