Siemens SITRANS FC330, Руководство по эксплуатации, Страница: 20 / 280

Installation variations
Note
Requirements for safe installation
● Remote sensor FCS300 can be installed in Zone 1, Div. 1 as Intrinsically Safe or
Flameproof.
● Standard remote installation with FCT030 because the connection is certified Intrinsically
Safe. Flameproof seals and conduit (for IS cable) can be used.
● Requirement for IS circuit is that the maximum input voltage Vi to DSL is 20 VDC, Ii is
maximum 484 mA, Pi < 2.3 W
2.4.2 Maximum temperature specifications for use in hazardous areas
Temperature classification is related to the process temperature and ambient temperature as
listed below.
The maximum allowable process fluid temperatures with respect to temperature class for the
device when used with potentially explosive gases in a maximum ambient temperature of
+60°C are:
FCS300 Sensor and Pedestal Adapter:
● T4 at process temperature ≤ 100°C and Ta ≤ 53°C
● T3 at process temperature ≤ 150°C and Ta ≤ 33°C
● Temperature classes T6 and T5 are not applicable
FCT030 remote transmitter
Temperature classification with and without dust is as follows:
● Potentially explosive gases: T6 (85°C surface temperature)
● Dust environment (Zone 21): T85°C
The maximum dust layer shall be no greater than 5 mm (T5 85 °C).
If Tprocess ≤ 85°C, maximum surface temperature = 85°C
If Tprocess > 85°C, maximum surface temperature = process temperature
Safety notes
2.4 Use in hazardous areas
SITRANS FC330
20
Operating Instructions, 01/2019, A5E44030648-AB