KROHNE H250 M40 EN - Manual (Page 26)

4
ELECTRICAL CONNECTIONS
26
H250 M40
www.krohne.com 11/2012 - 4000640702 MA H250 M40 R02 en
If the measuring pointer vane goes into the slot an alarm is triggered. If the pointer vane is
outside the slot sensor, a wire break in a NAMUR contact also triggers the alarm.
The 3-wire limit switch does not have any wire break detection.
Current consumption in the position shown:
Switch contact definition
1 MIN contact
2 MAX contact
3 Pointer vane with switching vane
Definition MinMin - MaxMax
1 MIN 2 contact or MAX 1 contact
2 MIN 1 contact or MAX 2 contact
Contact Type current
MIN 1 NAMUR ≤ 1 mA
MIN 2 NAMUR ≤ 1 mA
MAX 1 NAMUR ≥ 3 mA
MAX 2 NAMUR ≥ 3 mA
MA_H250_M40_R02_en_640702_PRT.book Page 26 Wednesday, November 28, 2012 12:23 PM