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Checklist for connecting safety digital outputs in parallel with DX581-Sdl-permalink__symbolPermalink

No.

Item to check

Fulfilled (yes / no)?

Comment

1.

Safety digital output channels from different groups (O0…O3 and O4…O7 are not in the same parallel connection.

2.

The DX581-S parameter “Detection” is set to “On” for all safety digital outputs connected in parallel.

3.

The safety application on the safety CPU controls all safety digital outputs connected in parallel with the same safety application signal.

4.

The safety application on the safety CPU switches off all of the safety digital outputs connected in parallel if a fault is detected on one output.

5.

The capacitive load per output does not exceed the following limits.

  • One output ≤ 300 μF

  • Two outputs in parallel ≤ 600 μF

  • Three outputs in parallel ≤ 900 μF

  • Four outputs in parallel ≤ 1200 μF

6.

The current of the electrical load per safety digital output does not exceed the following limits.

  • One output ≤ 0.5 A

  • Two outputs in parallel ≤ 1.0 A

  • Three outputs in parallel ≤ 1.5 A

  • Four outputs in parallel ≤ 2.0 A

7.

The test pulses on the safety digital outputs (with a duration of less than 1 ms) do not affect the load.

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