Hello Sir,

I need your guidance on following for one of the project requirement. we need to calculate battery sizing for instruments (Flow computer/RTU/PLC, field transmitters & barriers)- details of requirement/instrument is as under

1. Flow computer/RTU/PLC is a hazardous area device & to be mounted in CLASS I DIV I area

2. Field transmitters are also to be mounted in CLASS I DIV I AREA

3. For isolating purpose, we are using active type Analog input barriers between Flow computer/RTU/PLC & field transmitters

Working philosophy: field transmitters to be powered on using Flow computer/RTU/PLC AI signals through active type barriers. now to calculate battery sizing, please clarify on following:

1. Do we need to calculate power consumption of all instruments (Flow computer/RTU/PLC, field transmitters & barriers)?

Jigna

 

If the flow computer, field transmitter and active barriers all need to be battery powered, then you need to know how much power they all consume in order to size the battery and its charging system.

Putting it in a Cl 1 Div 1 area will be interesting.