AB-7352-U
13
Connection Examples (Connection to Azbil Corporation’s SDC series controller)
Connection to Model SDC35TC0/SDC36TC0
Connection to Model SDC35TC0/SDC36TC0 (Parallel operation)
Notes:
Input impedance of the actuator is 100
.
For connecting multiple ACTIVAL to one controller (e.g., Model SDC35/SDC36), provide a transformer (two in total) for each ACTIVAL
since 4 to 20 mA input is not isolated from other terminals.
Terminals 2, 5, and 7 are connected inside the actuator. To connect to a device (PLC, position indicator, etc.) with its terminals not isolated
inside, externally isolate (between the ACTIVAL and the device). Otherwise, a loop is formed for the common line and can damage the
circuit of the ACTIVAL. (R series controllers including Model SDC35/SDC36 shown in Figs. 9 and 10 are isolated inside.)
Isolation transformer is required for ACTIVAL. Transformer without isolation might damage the ACTIVAL and other devices connected to
ACTIVAL.
Model SDC35/SDC36TC0
Model VY5198K/VY5198H
(4 to 20 mA DC input with
4 to 20 mA DC output)
+ 13
- 14
1 T
1
2
T
2
4 +
5
-
6 +
7
-
Figure 9. Connection example:
Single Model VY5198K/VY5198H
with Model SDC35/SDC36TC0
Power
supply
Isolation
transformer
Position indicator
Isolator
+
-
+ +
- -
Isolation example:
If the position indicator is not isolated inside, provide
an isolator. If isolated, an isolator is not required.
Model SDC35/SDC36TC0
+ 13
- 14
1 T
1
2
T
2
4 +
5
-
6 +
7
-
Figure 10. Connection example: Two Model VY5198K/VY5198H
with Model SDC35/SDC36TC0 (Parallel operation)
2
Model VY5198K/VY5198H
(4 to 20 mA DC input with
4 to 20 mA DC output)
1 T
1
2
T
2
4 +
5
-
6 +
7
-
Power
supply
Isolation
transformer
Power
supply
Isolation
transformer
Position indicator
Isolator
+
-
+ +
- -
Position indicator
Isolator
+
-
+ +
- -
Isolation example:
If the position indicator is not isolated inside, provide
an isolator. If isolated, an isolator is not required.
