EBS852 / EBS862
ELECTRONIC UNIT | OI/EBS852/EBS862/EX-EN REV. B
25
Operation downstream from step controller
Contrac actuators can be driven using step controller pulses instead of an analog setpoint. The following conditions must be fulfilled
in order to implement the step controller pulses:
• The binary inputs must be configured using the ‘STEP CONTROLLER’ function.
• The binary input 1 must be connected with +24 V DC (automatic operation).
• The ‘AUT’ operating mode must be selected through the graphic user interface.
M10358
+28 29
RB
+ -
Uv
24V
24V
+26 -27
RB
+ -
+30 -31
I
U
7
8
9
11
12 13 +14 -15
10
+1 -2
+3 -4
+5
-6
Transmitter
4 ... 20 mA
Setpoint
+ HART
0/4 ... 20 mA
act. pos.
0/4 ... 20 mA
DO 1
o.k./fault
DO 2
endpos.
0%
DO 3
endpos.
100%
DI 1
MAN/A
UT
DI 2
MAN (+)
DI 3
MAN (-)
Uv
out
Contrac electronic unit
Controller
Release of
controller
Figure 13: Connection example for operation downstream from a step controller
