3 | Installation and assembly
FISCHER Mess- und Regeltechnik GmbH
12/24
BA_EN_ME12_ATEX
3.3.1 Standardised plug DIN EN 175 301-803-A
1
3
2
Cable screw connection
M16x1.5
Seal NBR
Contact insert
Housing
Screw
1
2
3
Line socket
Flanged connector
Fig. 10:
Line socket DIN EN 175 301-803-A
Ter-
minal
Signal name
DC
Cable colour
1
Supply /Output
+U
b
+Sig red
2
Supply /Output
-U
b
-Sig
blue
3
n.c.
n.c.
Table 1:
2-wire connection 4 ... 20 mA
The earth connection in the standardized plug is not connected.
3.3.2 M12 flanged connector DIN EN 61076-2-101
Coding A
1
4
3
2
1
4
3
2
Flanged
connector
Line socket
Fig. 11:
M12 plug DIN EN 61076-2-101
Pin
Signal name
DC
Cable colour
1
Supply /Output
+U
b
+Sig brown
2
n.c.
3
Supply /Output
-U
b
-Sig
blue
4
n.c.
Table 2:
2-wire connection 4 ... 20 mA
3.4 Commissioning
All electrical supply, operating and measuring lines and the pressure connec-
tions must have been correctly installed before commissioning. All supply lines
are arranged so that there are no mechanical forces acting on the device.
• If liquid measuring media are used the pressure connection lines must be
vented, as liquid columns of different heights in the pipes can cause meas-
uring errors. The instrument must be protected against frost, if water is used
as a measuring medium.
• Appropriate shutoff valves must be provided to ensure safety during installa-
tion, maintenance and inspection
