ATEX
Operating instructions
CleverLevel switch, LFFS
Ex ia IIC T5, ATEX II 1G - Installation
A Level Switch LFFS-1xx.x is Ex ia IIC T5, ATEX II 1G ap-
proved for application in hazardous areas in accordance with
the current EU directives. The product must be installed in
accordance with prevailing guidelines for zone 0 with a barrier
Ex-data
Supply range
24...30 VDC
Temperature class T1...T5 Pls. see above table
Internal inductivity L
i
<10 µH
Internal capacity C
i
<33 nF
Barrier data
U
<30 VDC
I
<0.1 A
P
<0.75 W
Connection type Ambient temperature Media temperature
(max. allowed)
Note
G½ hygienic
-40 … +85 °C
+85 °C
3A DN38
-40 … +60 °C
+95 °C
1)
-40 … +40 °C
+115 °C
1)
100 mm
-40 … +85 °C
+85 °C
Sliding connection
-40 … +60 °C
+155 °C
1)
-40 … +40 °C
+175 °C
1)
250 mm
-40 … +85 °C
+85 °C
Sliding connection
-40 … +60 °C
+195 °C
1)
-40 … +40 °C
+200 °C
1)
Conditions for Ex certification
1)
Provided that
the sensor tip
at the instru-
ment is the
only part in
contact with
the media
ATEX Gas ia
LFFS-1xx.x
with
PNP output
Safe area
+ 22...120 VDC
or
- 90...253 VAC
Note:
For PNP output the barrier module
PFOFSI3-B25100-ALG-LS
is required for functional purposes.
PF
O
F
S
I3
-B2
51
00
-AL
G
-L
S
NPN out
LFFS-1xx.x
with
NPN output
Note:
For NPN output only!
A standard barrier may be used
St
an
da
rd
b
arri
er
Two-channel
ZENER barrier
www.baumer.com
Operating instructions: 11109132 07 EN Page 8 / 12
Note:
There is an electrical connection between intrinsic safe circuit
and housing due to the measurement principle
