Interfaces between field mounted devices in explosive hazardous areas and non hazardous areas are useful to prevent a transfer of ignition energy from the non hazardous area into the explosive hazardous area. These interfaces must be able to reproduce the input signals with a minimal error ( as low as 10µA on 20 mA) with practically no distortion at an absolute minimum of noise level and be immune to Radio Frequency in line with.
Specs Sheet Attached