ATEX Dust tD
Operating instructions
CleverLevel switch, LFFS
ATEX Gas nA
Ex-Configuring
A Level Switch LFFS-2xx.x is Ex tD A20 IP67 T100°C, ATEX II 1D
approved for application in hazardous areas in accordance with the
current EU-directives. The product must be installed in accordance
with prevailing guidelines for zone 20 without a barrier.
Ex-data
Supply range
VDC
12,5...30
Load
I
<0.1 A
Temperature class T1...T5 Pls. see table top page 8
12,5...30 VDC
1
2
5
A Level Switch LFFS-3xx.x is Ex nA II T5, ATEX II 3G approved for
application in hazardous areas in accordance with the current EU
directives. The product must be installed in accordance with prevailing
guidelines for zone 2 without a barrier.
Ex-data
Supply range
VDC
12,5...30
Load
I
<0.1 A
Temperature class T1...T5 Pls. see table top page 8
The FlexProgrammer 9701 configuring unit must not be connected to the CleverLevel
Switch LFFS within the hazardous area.
Configuring procedure:
a) Disconnect mains from the 4...20 mA loop circuit.
b) Disconnect the Level Switch from the circuitry within the hazardous area.
c) Uninstall and bring the Level Switch to the safe area.
d) Connect the FlexProgrammer 9701 and perform the configuring session.
e) Re-install the Level Switch in the hazardous area.
f) Connect the power supply to the circuit.
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Operating instructions: 11109132 07 EN Page 9 / 12
12,5...30 VDC
1
2
5
Outside hazardous area
