Description Of System; Configuration And Function - Burkert 8690 Manuel D'utilisation

5 DescripTiOn Of sysTem
5.1 configuration and function
The Pneumatic Control Unit Type 8690 can control single or double-
acting process valves.
The Pneumatic Control Unit Type 8690 has been optimized for
integrated, modular installation on process valves of the 21xx series.
The module configuration permits a variety of expansion steps.
For installation on the 20xx series there is a special model which is
described in Chapter "5.1.2".
5.1.1 pneumatic control unit for integrated
installation on 21xx series
Cable gland M16 x 1.5 or
Circular plug-in connector M12 x 1
Fig. 1:

Configuration and function (1)

8
Transparent cap
Connection housing
Pilot air port
label: 1
Exhaust air port
label: 3
Pressure limiting valve
(for protection against
too high internal pressure
in case of error)
english
Type 8690
Descriptionofsystem
Optical position indicator:
The device status is displayed on the pneumatic control unit (yellow
mark).
Option: electrical position feedback
Optionally mechanical limit switches (micro switches) or inductive limit
switches (proximity switches) can measure the valve position.
View without transparent cap:
Air intake filter (exchangeable)
Fig. 2: Configuration and function (2)
Screw for adjustment
of the lower micro
switch or the lower
proximity switch
Optical position indi-
cator (yellow mark)
Screw for adjustment
of the upper proximity
switch
Screw terminals
Pilot valve (3/2-way
or 5/2-way solenoid
valve with hand lever)
Fastening screws (2x)