Siemens SITRANS FC430 Operating Instructions Manual page 24

Safety notes
2.4 Use in hazardous areas
Installation variations
Note
Requirements for safe installation
● Remote sensor FCS400 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. however 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
Maximum temperature specifications for Ex use
FCS400 remote sensor with DSL
Temperature classification with and without dust 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:
For installation in environment with max 5 mm dust, the maximum process temperatures shall
be as follows:
24
Ta (°C) Maximum Process Temperature per Temperature Class (°C)
T6
60 70
55 85
50 85
45 85
40 85
35 85
30 85
Ta (°C)
60
55
50
45
40
35
30
T5 T4
70 70
100 100
100 130
100 135
100 135
100 135
100 135
Maximum Process Temperature per Temperature
Class (°C)
Operating Instructions, 06/2017, A5E39789392-AA
T3
70
100
130
160
190
200
200
70
100
130
160
190
200
200
FC430 (From firmware 4.0)