Endress+Hauser micropilot FMR 231 E Sicherheitshinweise Seite 10

en XA 018F-A
Certified terminator
EEx ia IIC
R
C
PROFIBUS-PA
electronics
module
5
11
Tank
Hazardous
area
Zone 0
Fig. 1
Installation with overvoltage protection
e.g. armoured hose*
Transmitter
Metal housing*
Potential
bond
Potential bonding
(≤ 4 mm² Cu*)
Tank
Hazardous
area
Zone 0
Fig. 2
2
Explosion hazardous area
PROFIBUS-PA
electronics
module
5
Tank
Hazardous
area
Zone 1
Plant grounding system (here German practice)
Explosion hazardous area
Separate housing with
overvoltage protector
≤ 1000 mm*
e.g.. HAW 262 Z
2 1
2
1
Potential
bond
Plant grounding system (here German practice)
Metal housing*
Cable with screening or
metal sheath
Micropilot FMR 231 E
Non-hazardous area
Certified
Supply voltage
associated
apparatus
Non-hazardous area
Power supply or
evaluation unit
* Must satisfy the requirements of EN 60 079-14
for intrinsically safe circuits in Zone 0,
if the risk of dangerously high potential
differences within Zone 0 exists, e.g. by the
occurance of atmospheric electrical discharge.
Endress+Hauser