Instument with ESD Function

[saiedmehdipour]

Dear Friends;

Is there any body to help me about using of Transmitter insted of Switch for ESD function?
I need referable standard and/or documents, fact and figure.
for more explanation, for instance i think it is better to using PIT(pressure Ttansmitter) and take a software switch in ESD system for alam high High action insted of using
PS(pressure Switch).
it would be Appreciated if anyone reply to me.

Best Regards

[zulqurnain]

Advantages of Transmitter:
-Diagnostic features Via HART if any asset management packages are used. Which will reduce instrument failures leading to trips
-Flexibility in changing setpoint in the ESD system after commissioning.
-Pre alarm can be configured in ESD and relayed to the operator
-HH/LL multiple trips can be initiated from the same instrument.

Switch
-safety engineers may prefer switched since its more reliable and trip setpoints will not be altered without proper documentation.
-no diagnostics