Line monitoring with IS isolators


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I am given a task to implement line monitoring on a few digital input and output signals. For digital signals i am using MTL5514 isolators. according to the datasheet i will need a 680 ohms resistance in series and a 22Kohm resistance in parallel with the the Switch located in hazardous area.

but for the digital outputs the datasheet of the isolator (MTL5523) does not specify any component for line monitoring. Can anyone tell me how can i get line monitoring for digital outputs. (the driven load from the DOs are 24 VDC relays.

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