Burkert 8681 Démarrage Rapide page 12

Terminal strip 1 Confi guration
PE Protection Earth - protective conductor
L
Power supply
120 V AC
N
S1 OUT Ouput position 1
S2 OUT Ouput position 2
S3 OUT Ouput position 3
S4 OUT Ouput external initiator
Y1 Input solenoid valve 1
Y2 Input solenoid valve 2
Y3 Input solenoid valve 3
Terminal strip 2 Confi guration (external initiator)
L Power supply - live conductor
S4 IN Input external initiator
N Power supply - neutral conductor

Close the housing.

Ensure IP protection (dummy plugs).
An external initiator can be connected using the small
3-pin terminal strip 2 - see manual, chapter „Connection of
an external initiator".
english
44

The process valve can now be moved into a third,
defi ned position.

Depress the middle Teach-In button (T3) for approx.
1.5 seconds (the LED corresponding to this position
will fl ash quickly three times during the teaching
phase).
Once this position has been stored, the corresponding
LED will fl ash continuously until the position of the
piston is changed.

If necessary, return control head and system to normal
state (switching position, power supply).

Close the housing.
13.2. Teach-Reset

Depress the Teach-In button (
(optical feedback: Blinking in the fault color)
13.3. Autotune
Autotune functions and Autotune sequences - see oper-
ating instructions.
13.4. LED - Color Assignments
S1 - green, continuously lit,
S2 - yellow, continuously lit,
S3 - green, continuously fl ashing (250 ms/250 ms)
(Delivered state of the DIP switches: 0000)
english
46
All manuals and user guides at all-guides.com
live conductor
neutral conductor
T1+T2) for ca. 2.5 sec.
13. POSITION MEASURING
SYSTEM
The recordable stroke range is between 0 and 80 mm.
Three Teach-In buttons have been provided for comparison
with the actual stroke range.
13.1. Teach-In

Open the housing.

Supply electrical power.

Position the process valve at the lower switching
position.

Depress the lower Teach-In button (T1) for approx. 1.5
seconds (the LED corresponding to this position will
fl ash quickly three times during the teaching phase).
Once this position has been stored, the corresponding
LED will remain continuously lit until the position of the
piston is changed.

Afterwards, position the process valve at the upper
switching position to be recorded.

Depress the upper Teach-In button (T2) for approx. 1.5
seconds (the LED corresponding to this position will
fl ash quickly three times during the teaching phase).
Once this position has been stored, the corresponding
LED will remain continuously lit until the position of the
piston is changed.
14. START-UP
WARNING!
Risk of injury from improper operation!
Improper operation may cause injury and damage to the
device and its environment.
• Before starting-up must be ensured that the contents
of the manual operator is known and understood.
• The safety instructions and the intended use must be
followed.
• Only adequately trained personnel should take the
plant / the device in operation.

Assembly of the control head type 8681.

Pneumatic and electrical installation.

S etting the position measuring system (Teach-In).
After assembly, installation and setting of the position mea-
suring system according to the operating instructions the
control head is ready for operation.
Type 8681
english
45
english
47