Endress+Hauser levelflex M FMP 41 C Bedienungsanleitung Seite 13

Levelflex M
Corresponding
permitted
R
terminal
C
resistor
EEx ia IIC
Electronic
insert
according to the
FISCO model
6.2
Tank
danger
area
Zone 0 or
Zone 20
Figure 3
Installation with overvoltage protector
Transmitter
Metal housing*
6.2
Tank
danger
area
Zone 0 or
Zone 20
Figure 4
Endress+Hauser
Explosion-hazardous area
Zone 1 or Zone 22
Option: e.g. FHX40
(certified to ATEX)
Electronic
observe addmissible danger area
insert
according
to the
FISCO model
Rod, or
6.2
rope probe
Tank
danger
area
Zone 1 or
Zone 21
Potential matching system
Explosion-hazardous area
Separate housing with
≤1000 mm *
overvoltage protector
e.g. HAW 262 Z
Metal housing*
e.g. armoured hose *
2 1
2
1
PAL connection PAL
connection
Potential matching line
Potential matching system
EX
EX
EX
EX
Power supply or
switching unit
Cable with
screening or
metal sheath
* Requirement as per EN60079-14 for intrinsically-safe circuits in Zone 0,
if there is a risk of dangerous potential differences within Zone 0,
e.g. through the occurrence of atmospheric electricity.
XA 266F-A
Non-explosion-hazardous area
Certified
associated
Supply
apparatus
voltage
(FISCO model)
Non-explosion-hazardous area
3