26
9.8.6. Passive Outputs Outside Ex Zone
Configuration intended to be used outside hazardous area. Outputs load
(LOAD) is powered using an external power supply placed outside the
hazardous area.
The power supply and the load (relay contacts) are connected via relevant
„SWITCH AMPLIFIER”.
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 power
supply. This would result with loss of intrinsic safety.
All instruments connected to indicator’s digital IN/OUT
require ‘ia’ or ‘ib’ protection.
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