Finder Impulse changeover switch - 48V DC - 16A

An impulse changeover switch, also known as a bistable relay or latching relay, changes its contact state with each momentary pulse applied to its coil. It remains in the new state until the next pulse, regardless of whether the pulse is maintained.

Surge protection helps to absorb voltage spikes that can occur in electrical systems. This protects the relay's internal components from damage, increasing its lifespan and reliability, especially in industrial environments prone to electrical disturbances.

No, this specific model (20.22.9.048.4000) is designed exclusively for a 48V DC control voltage. Using a different voltage will likely damage the relay. Please refer to other Finder models if you require a 12V DC version.

The maximum switching power depends on the load type. For resistive loads (AC1), it's up to 4000 VA at 230V AC. For motor loads (AC15), it's 750 VA. For incandescent lamps, it's 2000W. Always refer to the detailed specifications for different load types.

No, this model provides two normally open (NO) contacts. It does not have integrated normally closed (NC) contacts. If NC contacts are required, you may need to use an external relay or a different model.

The relay features a test button which also serves as a mechanical switch. Pressing this button allows you to manually switch the contacts and see the current position indicated mechanically.

The relay has an IP20 protection rating. This means it is protected against solid objects greater than 12.5mm (like fingers) but offers no protection against water ingress. It should be used in a dry environment or within an enclosure.

Verify the 48V DC control voltage supply is present and correct at the coil terminals. Check that the control input signal is a momentary pulse. Ensure the manual switch is not engaged.

Check for any mechanical obstructions. Inspect the wiring for shorts or loose connections. If the issue persists, the relay coil or contacts may be damaged and require replacement.

Ensure the connected load does not exceed the 16A rating or the specified power limits for different load types. Verify proper ventilation around the relay and the control cabinet.

The connected load may be too high, or the load type might cause excessive arcing. Ensure the load is within the specified AC1, AC15, or other load type limits. Contact material may be degraded if subject to constant high inductive loads without proper snubbers.