Pepperl+Fuchs VIM62PP-E1V16-0PE-I420V15 Manual page 18

VIM6* Vibration Sensors
Installation
Grounding Concept 4 (For Use in Hazardous Areas with Type of
Protection Ex i)
Only applicable for:
• VIM6***-*****-*P*-******* vibration sensors
• Plug versions with V15-W-N4-*M-PUR-N4S5 connection cable accessories from Pep-
perl+Fuchs.
• Assumption: The sensor housing and the cable shield are connected.
Warning!
Connection cable for VIM6***-*****-*P*-******* vibration sensors with connector plug.
A special V15-W-N4-5M-PUR-N4S5 connection cable from Pepperl+Fuchs must be used with
VIM6***-*****-*P*-******* vibration sensors with type of protection Ex i and a connector plug in
order to meet the requirements of the standard for type of protection Ex i.
When using this connection cable, the cable shield is connected to the potential of the sensor
housing, which is typically located on the machine earth. On the sensor side of the connection
cable, the cable shield is connected to the knurled nut on the cable connector and pin 5 of the
cable—i.e., it is live. This means that when the cable is connected, the cable shield is con-
nected to the sensor housing potential. The shield must not be grounded at the other end of the
connecting cable.
Situation/Requirements of
the Application
No EMC interference is
expected from the machine
side,
e.g., from the frequency
inverter
Coupled interference must be
deflected
Table 3.4
18
Effects of the Grounding Concept
• The machine should be connected to the sensor housing,
or there is no effect on the quality of the measurements
provided by the sensor.
• EMC interference that still directly affects the sensor head
can discharge via the machine earth.
Deflected via earth at the sensor mounting point (-> point 1 in
Fig.)