Operating Instructions
Level measurement
CleverLevel
®
LBFH/I
Point level detection – hygienic/industrial
7. Electrical connection in explosion hazard areas
Depending on the variant, the LBFH/I is approved for most explosion hazard areas.
DANGER
Risk of fatal accident due to a wrongly connected sensor
f
In explosive gas atmospheres of zone 0 or 1, use Baumer isolation barriers or Zener barriers.
f
In explosive dust atmospheres, use insulated cable to IP67.
f
Allow only persons trained in explosion protection to perform the installation.
f
Never use FlexProgrammer or IO-Link Master con
fi
guration tools in explosion hazard areas.
7.1 Explosive gas atmospheres zone 0 and 1
The LBFH/I can be used in explosion hazard areas of zone 0 or zone 1. Sensors can use Baumer isolation
barriers which are easy to install or use Zener barriers.
Approval for LBFx.xx.xxx.xxxxxx.x.4xxx.x: ATEX II 1G Ex ia IIC T4 Ga
and ATEX II 1D Ex ta IIIC T100 °C Da (TÜV 17 ATEX 188894 X)
LBFx.xx.xxx.xxxxxx.x.4xxx.x and additional
dust atmospheres:
f
Use insulated cable to IP67.
f
Secure cables with external strain relief at a
distance 5 centimeters from the sensor.
All LBFH/I in zone 0 and zone 1
f
Use PROFSI3-B25100-ALG-LS isolation
barriers for the connection.
– or –
Use Zener barriers.
f
Comply with the following temperatures,
connection values and circuit diagram.
ATEX II 1G Ex ia IIC T4 Ga
Highest values for se-
lection of barriers
Ui: 30 V DC
Ii: 100 mA
Pi: 0,75 W
Internal capacitance
Ci: 63 nF
Internal inductance
Li: 617 µH
Temperature class
T1…T4:
–40 < Tamb < 85 °C
Protection class for
cable accessories
IP67
1
3
4/2
+
–
SW1/SW2
Function M12-A
4-pin
+ Vs
1
GND (0V) 3
SW1/SW2 4/2
DANGER
Risk of fatal accident due to failing communication with the sensor
IO-Link communication is not possible when a barrier is installed.
f
Do not use IO-Link communication together with a barrier.
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