Endress+Hauser Levelflex M FMP41C Safety Instructions page 15

Levelflex M
Safety instructions:
Zone 0
Endress+Hauser
Tab. 2
Power supply and signal circuit for remote display, e.g. FHX40, in protection type:
intrinsic safety Ex ia IIC or IIB
Uo = 4.2 V
Io = 34 mA
Po = 36 mW
For connecting the Commubox service interface with the associated ToF cable
Commubox output + ToF cable:
Uo = 3.74 V
Io = 9.9 mA
Po = 9.2 mW
When interconnected to a Levelflex M, the following results apply:
Lo =
for material group IIC Co =
for material group IIB Co =
• Only operate devices in potentially explosive vapour/air mixtures under atmospheric conditions *
–20 °C ≤ T ≤ +60 °C
0.8 bar ≤ p ≤ 1.1 bar
• If no potentially explosive mixtures are present, or if additional protective measures have been taken
acc. to EN 1127-1, the transmitters may be operated under other atmospheric conditions in accordance with
the manufacturer's specifications.
• Only install the devices in media for which the wetted materials have sufficient durability.
Tab. 3
Zone 0 - Application
Temperature class Maximum permitted
with or without medium temperature
VU331 display (process connection)
Probe in Zone 0 *
T6, T5, T4, +60 °C
T3, T2, T1
effective inner inductance
effective inner capacitance
characteristic curve:
effective inner inductance
effective inner capacitance
characteristic curve:
for material group IIC
0.15 mH 0.5 mH
≤ 8 μF ≤ 7 μF
Maximum permitted ambient temperature at the electronics housing
(electronics housing in Zone 1) dependent on the medium temperature
FMP41C
4
60 °C
KEMA 04 ATEX 1129 X / XA263F-B
Li = negligible
Ci = negligible
linear
Li = negligible
Ci = negligible
linear
Lo ≤ 340 mH
permitted outer inductance
Co ≤ 100 μF
permitted outer capacitance
1 mH 2 mH
≤ 5.5 μF ≤ 5 μF
10 μF
FMP41C with FMP41C with
remote electronics / remote electronics /
spacer tube spacer hose
60 °C
5 mH
≤ 4 μF
4
:
60 °C
15