We have a transmitter(slg 720) installed in a zone 1. it has a hazardous area rating of Exd[ia] it also has a 4-20ma output. We want to change this signal into enraf bpm so we are installing a converter in a switchroom which is a safe area,this is also rated Exd [ia].my question is does the cable between the two have to be an intrinsically safe cable?
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