ELECTRICAL CONNECTION INDICATOR M9
4
17
BW25
www.krohne.com
10/2008 • 4000432301 MA BW25 R01 en
4.2 Limit switch
Indicator M9 can be equipped with a maximum of two electronic limit switches. The limit switch
functions with a slot sensor which is operated inductively through the semicircular metal vane
belonging to the measuring pointer. The switching points are set through the contact pointers.
The position of the contact pointer is indicated on the scale.
The connecting terminals have a pluggable design and can be removed in order to connect the
lines. The built-in contact types are shown on the indicator.
Electrical connection of the limit switches
Electrical connection of the limit switches
Electrical connection of the limit switches
Electrical connection of the limit switches
Figure 4-1:
Limit switch module
1
Min. contact
2
Max. contact
3
Locking screw
4
Contact pointer
5
Connection terminal
Contact
MIN
MAX
Terminal no.
1
2
3
4
5
6
2-wire connection
-
+
-
+
3-wire connection
+
DC
-
+
DC
-
MA_BW25_R01_en_PRT.book Page 17 Thursday, October 30, 2008 3:49 PM
