Burkert Type 8690 - Manual (Page 9)

9
Descriptionofsystem
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
Exhaust air port
label: 3
Pressure limiting valve
(for protection against
too high internal pressure
in case of error)
Pilot air port
label: 1
Transparent cap
Connection housing
Fig. 1: Configuration and function (1)
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:
Pilot valve (3/2-way
or 5/2-way solenoid
valve with hand lever)
Air intake filter (exchangeable)
Fastening screws (2x)
Screw terminals
Screw for adjustment
of the upper proximity
switch
Screw for adjustment
of the lower micro
switch or the lower
proximity switch
Optical position indi-
cator (yellow mark)
Fig. 2: Configuration and function (2)
english
Type 8690