Regarding how to transmit instrument signals to the two control rooms separately
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I have a question for everyone: how can a pressure transmitter transmit signals to two different control rooms? Should 2 pieces of 1*2*1.5 control cables be connected directly to the pressure transmitter?
A pipeline that runs across 2 plants; there are instrument points on this pipeline, and both plant owners require that the readings be displayed in their respective control rooms
You can use a signal distributor for this; it’s the type that takes one input and produces two outputs
It is incorrect to connect two cables directly to the pressure transmitter. The pressure transmitter outputs mA signals; if it is necessary to display the readings in two control rooms, a serial circuit is required. Is that clear?
Alternatively, a one-in-two-out safety barrier can also be used.
It’s best to use an isolation module with one input and two outputs...
The method using the signal distributor on the 3rd floor is quite convenient
The isolator has one input and two outputs; it’s simple and practical. However, it’s still a good idea to choose a quality isolator – ones of poor quality may result in differences between the two output signals