Relay, service life of contacts and switching cycles

Question:

How long is the service life of the relay output contacts and how many switching cycles can be expected for the relay of the 8400?

Answer:

To achieve the maximum service life of the relay, the following basic conditions must be met:

Minimum relay contact load: 10 VDC / 10 mA (both values must be exceeded)
Maximum relay contact load: 250 VAC / 3 A or 24 VDC / 2A ... 240 VDC / 0.16 A

If these basic conditions are met, the following switching cycles can be achieved:

At 250 VAC / 3 A and ohmic load: > 300,000 switching cycles
At 24 VDC / 2A and inductive load: > 20,000 switching cycles

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