Description of system, Configuration and function – Burkert Type 8690 User Manual
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Description of system
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
Exhaust air connection
label: 3
Pressure limiting valve
(for protection against too
high internal pressure in
case of error)
Pilot air port
label: 1
Transparent cap
Fig. 2: Configuration and function (1)
Optical position indicator:
The device status is displayed on the pneumatic control unit (yellow
mark).
Option: electrical position feedback
Optionally 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 proximity
switch
Optical position indi-
cator (yellow mark)
Fig. 3: Configuration and function (2)
english
Type 8690 Ex