KROHNE BW 25 EN - Manual (Page 16)

4
ELECTRICAL CONNECTIONS
16
BW25
www.krohne.com 09/2010 - 4000432302 MA BW25 R05 en
4.2 Electrical connection indicator M9
4.2.1 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 nameplate of the indicator.
Electrical connection of the limit switches
Limit switch module
1 Min. contact
2 Max. contact
3 Locking screw
4 Maximum pointer
5 Connection terminal
Contact MIN MAX
Terminal no. 1 2 3 4 5 6
Connection 2-wire NAMUR - + - +
Connection 3-wire + - + -
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