3.1 GENERAL CONNECTION PRINCIPLES
WARNING
Before installation or maintenance work is car-
ried out, the following must be switched off:
•
the compressed air supply
•
power supply to the electronic components
(pin 1)
•
power supply to the outputs/valves (pin 2)
You thereby avoid:
• uncontrolled movements of loose tubing
• undesired movements of the connected
actuators
• undefined switching states of the electronic
components
VIFB13 - 03/05 3. Installation
9701 NH 3-3
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