Burkert 0780 Instructions De Service page 14

PTB 03 ATEX 1030 X
ApplicationConditionsfortheunits
6.1.8. fixing the solenoid
The solenoid is fixed to the valve housing with 4 cap screws.
Fig. 1: Fixing the solenoid
Cap screws
6.1.9. model with a terminal box
DANGER!
risk of explosion!
• Only permanently laid cables and wiring may be inserted
• The operator must provide suitable stress relief.
• Wires with an outside diameter of 6 to 13 mm may be used.
Observe the maximum thermal loading of the cables or wires to
be inserted.
• The inserted break-off seal must be matched to the diameter of
the cable or wire.
• The rated cross-section of the cable or wire strands must be at
least 0.75 mm² and may not exceed 2.5 mm².
• The screws for fixing the cover of the terminal box must be tigh-
tened with a torque of 100 Ncm (± 5 %).
The solenoid coils may also be executed with a terminal box, with or
without fuse/contactor (to separate Design Type Inspection Certi-
ficate) as desired.
For protection against inadvertent opening of the cover, the latter
bears the marking:
Open only when the voltage is switched off!
english
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