Endress+Hauser micropilot FMR 231 E Sicherheitshinweise Seite 13

Micropilot FMR 231 E
Note:
8) The type of protection changes as follows when the transmitter is connected to certified intrinsically safe circuits of
Category ib for Group IIC or IIB: EEx ib IIC T6 or EEx ib IIB T6.
The antenna may not be operated in Zone 0 if the transmitter is connected to a circuit of Category ib.
9) Option: overvoltage protection HAW 262 Z, see Fig. 2.
– The external overvoltage protector HAW 262 Z and the transmitter are to be connected to the local equipotential
bonding system.
– Potentials must be equalised both inside and outside the explosion hazardous area.
– The cable connecting the HAW 262 Z and the transmitter shall not exceeed 1 m in length.
– It shall be protected, e.g. routed in an armoured hose.
– The equipotential bonding shall be min. 4 mm² copper.
Power and signal circuits with type of protection intrinsic safety EEx ia IIC or IIB
Micropilot with PROFIBUS-PA
EEx ia IIC (FISCO model)
Ui = 17.5 V or
Ii = 280 mA
Pi = 4.9 W
Safety notes for Zone 0:
10) Potentially explosive vapour/air mixtures may arise under atmospheric conditions only:
If no potentially explosive mixtures are present, or if additional protective measures have been taken, e.g. EN 1127-1,
the transmitters may be operated under other than atmospheric conditions in accordance with the manufacturer's
specifications.
11) The antenna may be employed in those media, for which the wetted parts are known to be suitable.
12) The construction of the transmitter renders unnecessary any additional overvoltage protection for plants that must be
protected against risk of ignition through lightning in accordance with German National Guidelines TRbF 100 No. 8.
13) Associated apparatus with galvanic isolation between the intriniscally safe and non-intrinisically safe circuits
are to be preferred.
Table 2
Zone 0 applications
Temperature class Temperature of potentially explosive atmosphere
T6
T6
T5
T4, T3, T2, T1
Endress+Hauser
Ui ≤ 24 V
Li
≤ 250 mA
Ii Ci
Pi ≤ 1.2 W Leakage current ≤ 50 µA
–20 °C ≤ T ≤ +60 °C
0.8 bar ≤ p ≤ 1.1 bar
(antenna in Zone 0) see Item 10
–20...+60 °C
–20...+50 °C
–20...+60 °C
–20...+60 °C
≤ 10 µH
≤
5 nF
(at electronics housing / electronic housing in Zone 1)
XA 018F-A
Ambient temperature
–40...+40 °C
–40...+50 °C
–40...+65 °C
–40...+80 °C
en
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