Burkert 8681 Démarrage Rapide page 5

8.1. Assembly
For the installation of the Control Head Type 8681 to a
process valve, you will require a process valve-specifi c hub
fl ange as an adapter. The hub fl ange must be adapted to
the design of the process valve.

Mount the piston rod with the target on the process
valve spindle. Observe reference dimensions!

Fasten the hub fl ange on the process valve.
During this, observe central alignment and sealing
conditions!

Check the secure fi t of the sealing rings (in the upper
and lower grooves).

Mount the control head on the hub fl ange (seamlessly
360° rotatable).

Secure the control head with the two locking screws
(shoulder screws M5) in the middle grove of the hub
fl ange (see operating instructions).
8.2. Pneumatic Installation

Connect the required working connections 2/A1 to 2/
A3 (each according to model) with the corresponding
connections on the process valve.

Connect the supply line to supply pressure connection
1/P (2.5 to 8 bar).
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8.3. Opening and Closing the
Housing
Opening:

Loosen plastic self-cutting screws or seal, if housing
has been secured.

Open the plastic hood by turning counterclockwise (all
the way, approx. 1.5 cm).
Closing:

Put the plastic hood on the lower part such that the
inner lugs are positioned over the fastening grooves
and the external sealing lugs are positioned almost over
each other. Press the hood completely over the seal of
the lower part.

Turn the hood by approx. 1.5 cm clockwise (meaning
until the sealing lugs are positioned over each other).
A seal or a hood safeguard using plastic self-cutting
screws is required in the explosion-risk area!
8.4. Electrical Installation
see chapter
9. 24 V DC - Design ,
11. DeviceNet- Design or
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All manuals and user guides at all-guides.com
10. AS-I - Design ,
12. 120 V AC - Design .

A silencer has already been mounted on the Exhaust
Air Connection (3/R) in the supplied state.
Sealing lugs
at the
housing
3/R
Exhaust air
connection
(Silencer)
2/A3: SV 3 2/A2: SV 2
2/A1 ... A3 - Working connections - Solenoid valves (SV)
The fl ow restriction screws
R and P of the solenoid valves
(see operating instructions) are
used for setting the air intake and
exhaust for the working connec-
tions (for setting of the control
speed of the process valves).
9. 24 V DC - DESIGN
9.1. Connection options
left: 1 x M16 x 1,5 cable
gland
for power supply and
signals
right: 1 x M16 x 1,5 cable
gland for external initiator
Type 8681
1/P
Supply pressure
connection
2/A1: SV 1
open close
R
P
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left: 1 x M16 x 1,5 cable
gland with multi-pole
connection (M12 plug
according to IEC 61076-
2-101, 12-pole) on a cable
of 8 cm length
right: 1 x M16 x 1,5 cable
gland for external initiator
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