Endress+Hauser levelflex M FMP 41 C Bedienungsanleitung Seite 10

XA 262F-A
Corresponding
permitted
R
terminal
C
resistor
EEx ia IIC
Electronic
insert
according to the
FISCO model
6b
Tank
danger
area
Zone 0
Figure 1
Installation with overvoltage protector
Transmitter
Metal housing*
6b
Tank
danger
area
Zone 0
Figure 2
2
Explosion-hazardous area
Zone 1
Option: (ATEX-certified)
-Remote Display FHX40
Electronic
-Service Interface
insert
according
to the
FISCO model
Rod, or
6b
rope probe
Tank
danger
area
Zone 1
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
PAL connection
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.
Non-explosion-hazardous area
Certified
associated
Supply
apparatus
voltage
(FISCO model)
Non-explosion-hazardous area
Endress+Hauser
Levelflex M