WARNING
Opening device in energized state
Risk of explosion in hazardous areas
● Only open the device in a de-energized state.
●
Check prior to commissioning that the cover, cover locks, and cable inlets are assembled
in accordance with the directives.
Exception: Devices having the type of protection "Intrinsic safety Ex i" may also be opened in
energized state in hazardous areas.
Note
Hot surfaces
Hot process medium and high ambient temperatures lead to hot surfaces which can cause
burns.
● Take corresponding protective measures, for example wear protective gloves.
WARNING
Hazardous contact voltage
Risk of injury through hazardous contact voltage when the device is open or not completely
closed.
The degree of protection specified on the nameplate or in
Technical data
(Page 199) is no
longer guaranteed if the device is open or not properly closed.
● Make sure that the device is securely closed.
8.2 Switching on the supply voltage
Requirement
● You have connected the device correctly.
(Page 69)
● The terminal voltage on the device is correct. (Page 238)
Commissioning
8.2 Switching on the supply voltage
SITRANS P320/P420 with 4 to 20 mA/HART
88 Operating Instructions, 11/2019, A5E44852162-AC
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