Repair work at the cooling system
10.6
Interface board IB3 (-7N1) for step motor valve
Figure
58
: Interface board IB3 (-7N1 ) for step motor valve
- 4-20
white
green
black
red
IN
GND
24 V +
24 V -
+ 4-20
S
te
p
m
o
tor
va
lve
Input
0
-10 V
D
C
Jumper CN2
Outside position: Normal operation
Middle position: step motor valve open
Jumper
CN4
never placed
Jumper
CN3
always placed
118
Service Manual KBF (E5.2) 04-2015