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System description, Configuration and function, 5system description – Burkert Type 8691 User Manual

Page 11: 1 configuration and function

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Systemdescription

5

sysTem DescripTiOn

5.1

configuration and function

The control head Type 8691 can control single or double-acting process valves.

The control head Type 8691 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”.

The valve position is recorded via a contactless, analog sensor element which uses the teach function to automati-
cally detect and save the valve end positions during start-up.

Apart from the electrical position feedback, the status of the device is optically displayed on the control head itself
by a colored high-power LED.

Option: Communication possible via AS-Interface or DeviceNet.

5.1.1

control head for integrated installation on the 21xx series

24 V DC: Cable gland M16 x 1.5 or circular plug-in connector M12 x 1

Exhaust air connection
label: 3

Pressure limiting valve (for protection against too high internal
pressure in case of error)

Pilot air port
label: 1

Teach function
Description see chapter on the appropriate model
„Teach function (calibrating the end positions)“

Views without transparent cap and body casing

Pilot valve (3/2-way or 5/2-way solenoid valve with hand lever)

Air intake filter (exchangeable)

Fastening screws (2x)

Screw terminals

Device status display (Top LEDs)

Status display pilot valve

Connection housing

Figure 1:

Design and function

english

Type 8691