bürkert 8690 Bedienungsanleitung Seite 28

9.1.1. adjustment of the proximity
switches
DangEr!
risk of electric shock!
• Before reaching into the system, switch off the power supply
and secure to prevent reactivation!
• Observe applicable accident prevention and safety regulations
for electrical equipment!
Screw for adjustment of the lower
proximity switch
Screw for adjustment of the upper
proximity switch
Fig. 20: Adjustment of the proximity switches
28
adjustment of the prox-
imity switches
upwards downwards
turn screw turn screw
clockwise anticlockwise
english
Type 8690 Ex
Electrical installation
procedure:
→
Open the Pneumatic Control Unit: unscrewing the transparent
cap in an anticlockwise direction.
→
Adjust the the proximity switches via the adjusting screw(s) (see
"Fig. 20").
→
Check the switching point(s) using suitable measuring
equipment.
→
Check that the seal is correctly positioned in the transparent cap
(see "Fig. 21").
Fig. 21: Position of the seal in the transparent cap
noTE!
damage or malfunction due to penetration of dirt and
humidity!
• To observe protection class IP65 / IP67, screw the transparent
cap in all the way.
→
Close the transparent cap (assembly tool: 674077
The assembly tool (674077) is available from your Bürkert sales
6)
office.
Transparent
cap
Seal
transparent cap
).
6)