ELECTRICAL CONNECTION INDICATOR M9
4
19
BW25
www.krohne.com
10/2008 • 4000432301 MA BW25 R01 en
If the pointer vane enters the slot, an alarm is triggered. If the pointer vane lies outside the slot
sensor, a wire break also causes the alarm to be triggered.
The 3-wire limit switch does not have any wire break detection
Figure 4-3:
Switch contact definition
1
MIN contact
2
MAX contact
3
Pointer vane with switching vane
Figure 4-4:
Definition MinMin - MaxMax
1
MIN 2 contact or MAX 1 contact
2
MIN 1 contact or MAX 2 contact
Contact
Type
Current
MIN 1
SJ3,5-S1N
≤
1 mA
MIN 2
SC3.5-NO
≤
1 mA
MAX 1
SJ3,5-S1N
≥
3 mA
MAX 2
SC3,5-NO
≥
3 mA
MA_BW25_R01_en_PRT.book Page 19 Thursday, October 30, 2008 3:49 PM
