
4. Mechanics and Pneumatics
4.4.4 CU43 AS-interface for DE3, DA3+ double seat mix proof valves
Functional description - block diagram
Sensor 1
(“Valve closed”)
Sensor 2
(“Valve open”)
A/ Exhaust
A/ Exhaust
IN
Air
seat lift cylinde
r
lower valve seat
main cylinder and integrated seat lift cylinde
r
upper valve seat
The picture shows a standard NC
(spring to closed) valve.
1
2
3
4
5
6
7
8
10
11
12
AS-i-Bus +
AS-i-Bus -
5 VDC
Sensor 1
GND
5 VDC
Sensor 2
GND
Normal
Feedback
Reverse
sol. 1
sol. 2
sol. 3
APV_CU4 AS-i_UK-5_072018.indd
UK
Control Unit
CU4 AS-interface
Instruction manual: UK - rev. 5
APV
15