Finder Impulse changeover switch - 24 V DC
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Rapid Online - Rapid Electronics Ltd.Finder 20.23.8.024.4000 impulse changeover Switch 16 A DIN Rail mount
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Product Information
Full details
This Finder Impulse Changeover Switch (MPN 20.28.9.024.4000) is designed for electricians and automation professionals integrating control systems. Its key benefit is reliable switching in 24V DC circuits with surge protection. A potential caveat is its specific DC voltage requirement, making it unsuitable for AC systems without conversion.
All features
| Model Part Number | 20.28.9.024.4000 |
|---|---|
| Brand | Finder |
Extended Product Information
FAQs
What type of control voltage does this switch use?
This Finder Impulse Changeover Switch is designed specifically for 24V DC control voltage.
Can this switch be used in AC circuits?
No, this switch is designed for DC circuits only. Using it in AC circuits will likely cause damage.
How many circuits can this switch control?
The switch features two Normally Open (NO) contacts, allowing it to control up to two separate circuits simultaneously.
What is the maximum load the switch can handle?
The switch is rated for a maximum switching current of 16A at 250V AC (AC1 rating). Specific load types like incandescent lamps have different maximum power ratings.
Does the switch require power to maintain its state?
No, this is an impulse or latching relay. It changes its state upon receiving a pulse and maintains that state without continuous power applied to the coil.
What does 'impulse changeover' mean?
It means the switch changes its contact position each time it receives a momentary pulse signal to its control coil. It latches into the new position until the next pulse.
Is manual operation possible?
Yes, the switch includes a test button that allows for manual operation and checking of the switching status.
Troubleshooting
Switch does not respond to impulse signal
Verify the 24V DC supply to the coil is connected correctly and stable. Ensure the impulse signal is being sent to the correct terminals. Check the mechanical switching position display for status.
Contacts are not switching or are stuck
Ensure the load current does not exceed the rated 16A. Check for any physical obstructions. Attempt manual operation using the test button. If the issue persists, the unit may need replacement.
Switching is intermittent or unreliable
Check for loose wiring connections at the coil and contact terminals. Ensure the control voltage is within the specified 24V DC range. Verify that the contacts are clean and not oxidized (though AgSnO2 is resistant).
Unit overheats
Confirm that the load current is within the specified limits. Ensure adequate ventilation around the mounted switch. Excessive switching frequency under heavy load can cause heat; check operational duty cycle.
Pros and Cons
Pros
- Reliable switching for DC control circuits
- Compact design for DIN rail mounting
- Built-in surge protection enhances longevity
- Manual operation for testing and setup
- Dual NO contacts offer redundancy
Cons
- Limited to 24V DC operation only
- Not suitable for AC control circuits without a converter
- Specific use case requires impulse signal
- Width of 17.5mm uses one modular spacing
Setup, Compatibility & Care
Setup:
- Mounting: Secure the switch onto a standard 35mm DIN rail.
- Wiring: Connect the 24V DC control voltage to the designated coil terminals (typically marked A1/A2 or similar). Ensure correct polarity.
- Load Connections: Wire your load circuits to the Normally Open (NO) contacts. Note that this unit has two NO contacts.
- Verify Connections: Double-check all wiring against the wiring diagram to prevent errors.
Compatibility:
- Voltage: Strictly compatible with 24V DC power sources. Using other voltages will damage the unit.
- Mounting Rail: Designed for standard 35mm top-hat DIN rails.
- Control Signal: Requires a momentary impulse signal to change state.
Care:
- Cleaning: Disconnect power before cleaning. Use a dry or slightly damp cloth to wipe the exterior. Avoid solvents or abrasive cleaners.
- Environment: Operate within the specified temperature and humidity ranges to ensure longevity. Keep away from excessive dust and moisture. Ensure adequate ventilation.