KROHNE H250 M40 EN - Manual (Page 24)

4
ELECTRICAL CONNECTIONS
24
H250 M40
www.krohne.com 11/2012 - 4000640702 MA H250 M40 R02 en
4.2 Electrical connection indicator M40
4.2.1 Indicator M40 - limit switches
The M40 indicator can be fitted with a maximum of two limit switches. The limit switch works as
a slot sensor which is inductively activated via the semi-circular metal vane of the pointer. The
switching points are set using the contact pointer. The position of the contact pointer is displayed
on the scale.
The connecting terminals have a pluggable design and can be removed in order to connect the
cables. The built-in limit switch types are shown on 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 + - + -
Connection Reed SPST + - + -
MA_H250_M40_R02_en_640702_PRT.book Page 24 Wednesday, November 28, 2012 12:23 PM