Regarding the use of signal distributors
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There are an increasing number of requirements and standards for SIS systems, and these standards are becoming more stringent. May I ask whether signal distributors (field-mounted units that send one signal to the SIS and another to the DCS after passing through the signal distributor) can still be used? Are there any relevant descriptions in the standards or specifications?
Back in 2017, we did it this way; I’m not sure what the situation is now – it seems it’s not allowed anymore
If the transmitter belongs to a \"SIS loop,\" it is recommended not to use this configuration, as SIS loop specifications require that transmitters/valves be installed separately. If the signal is temporarily split into two for renovation, it can serve as a temporary solution.