COSA Xentaur Hygrocontrol Type 86 Ex - Manual (Page 10)

Transmitter: Transmitters built according to EN 50020 as intrinsically safe
supply instruments. Intrinsically safeness is given by Zener Barriers which
are encapsulated together with the connector for the cable to the probe
and therefore may not be manipulated by a user. These Barriers separate
the intrinsically safe power supply for the probes from the internal and
external current and voltage loops which are not intrinsically safe.
Concept of Realisation
HYGROCONTROL Manual for Type 86 Ex Page
9
Probe Type 861
Conception for Humidity Detectors Type 86-EX
Transmitter Type 86
Connection Cable
(intrinsically safe)
Power Cable Signal Cable
EX - Environment (Zone 1)
Category 2 GD
-20°C <= ta <= +60°C
EX - Environment (Zone 0)
Category 1 GD
-40°C <= ta <= +120°C
30 mbar < P < 30 bar
No EX -
-20°C <= ta <= +40°C
Environment
but intrinsically safe
Supply for Probes 861