S 800 HIGH INTEGRITY

Hello,

I have a safety 800XA 5.1 system and i need to interface my I/O information,

I'm asking if i can connect my I/O(DI880,DO880,AI880A )channels whitout any interface between PROCESS and the I/O cards.

thanks,

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mohammed el jaafari Rank: 1585

Asked 3 years ago

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Answers

Hello,

If i understood your question correctly, PROCESS means field/signals from field?

If yes, then the connection between S880 IO cards and field signals depends on the following:

1. Type of Input Signals.

2. Voltage level of field instruments (outputs) and Current consumption.

3. Zone classification of field instruments located.

If the field instruments are in safe zone and current consumption and voltage levels (especially for Digital Outputs) are within the permissible limits of IO modules, then field instruments can be directly connected to IO cards without any interface.

Hope it is clear to you.

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