RADWAG PUE HX5.EX, User Manual

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9.8.4. Active Outputs
Exemplary configuration intended to be used in hazardous area.
Outputs load (LOAD) is powered directly from the indicator. Maximum load
of voltage source Uo=13.65V cannot be greater than Io=42mA for all outputs
in total.
9.8.5. Passive Outputs in Ex Zone
Configuration intended to be used in hazardous area. Outputs load (LOAD)
is powered using an external power supply.
The external power supply must be an intrinsically safe device characterized
with features corresponding to the existing explosive atmosphere. The power
supply must guarantee intrinsic safety parameters for the following conditions,
Ui=30V and Pi=0.49W.
It is forbidden to connect electric potential and ground of
internal power supply unit (Uo and GND on IN/OUT interfaces
terminals of the indicator) with an external intrinsically safe
power supply. This would result with loss of intrinsic safety.
All instruments connected to indicator’s digital IN/OUT
require ‘ia’ or ‘ib’ protection.