User Manual

<2. Handling Cautions>
2-13
IM 01C25T02-01E
Note 3. Installation
• In any safety barrier used output current
must be limited by a resistor 'R' such that
Io=Uo/R.
• The safety barrier must be IECEx certied.
• Input voltage of the safety barrier must be
less than 250 Vrms/Vdc.
• The instrument modication or parts
replacement by other than authorized
representative of Yokogawa Electric
Corporation and will void IECEx Intrinsically
safe and type n certication.
Non-Hazardous Location
Hazardous Location
F0212.ai
Terminator
Safety Barrier
Field Instruments
Pressure
Transmitter
Field Instruments
+
−
+
−
+
−
Terminator
+
−
+
−
[Intrinsically safe]
Non-Hazardous location
Hazardous location
F0213.ai
Terminator
[nL] Equipment
Pressure
Transmitter
SUPPLY
Terminator
+
−
Transmitter
+
−
Transmitter
+
−
+ −
+ −
[Type n]