bürkert 8690 Bedienungsanleitung Seite 17

→
Screw the plug-in hose connectors onto the Pneumatic Control
Unit and the actuator.
→
Using the hoses supplied in the accessory kit, make the con-
nection between the Pneumatic Control Unit and the actuator
with the following "Tab. 1: Pneumatic connection to actuator".
note!
damage or malfunction due to ingress of dirt and moisture.
▶ To comply with degree of protection IP65 / IP67, connect the
pilot air outlet which is not required to the free pilot air port of
the actuator or seal with a plug.
"In rest position" means that the pilot valves of the Pneu-
matic Control Unit Type 8690 are isolated or not actuated.
If the ambient air is humid, a hose can be connected between
pilot air outlet 2 of the Pneumatic Control Unit and the
2
unconnected pilot air port of the actuator for control function
A or control function B. As a result, the spring chamber of
the actuator is supplied with dry air from the vent duct of the
Pneumatic Control Unit.
Type 8690
Installation
control function
Process valve closed
a in rest position
(by spring force)
Process valve open
B in rest position
(by spring force)
Process valve closed
in rest position
i
Process valve open
in rest position
Tab. 1: Pneumatic connection to actuator
english
pneumatic connection type 8690
with actuator
pilot air outlet pilot air port
type 8690 actuator
lower pilot air port
2
of the actuator
1
should be con-
nected to the
2
upper pilot air port
2
of the actuator
upper pilot air port
2
of the actuator
1
should be con-
nected to the
2
lower pilot air port
2
of the actuator
lower pilot air port
2
of the actuator
1
upper pilot air port
2
of the actuator
2
upper pilot air port
2
of the actuator
1
lower pilot air port
2
of the actuator
2
17