Safety notes
2.2 Installation in hazardous locations
FC410 with Modbus
18
Operating Instructions, 02/2016, A5E33120874-AC
FM:
Sensor with Mini Flow Link (MFL) (FC410):
Class I, II, III Division 1
Groups A, B,C, D, E, F, G
Class I Zone1 and Zone 20/21
Note
Control drawing
See Control drawing: A5E31205486A
Maximum temperature specifications for Ex use
Device 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:
Ta (°C)
Maximum Process Temperature per Temperature Class (°C)
T6
T5
T4
T3
60
70
70
70
70
55
85
100
100
100
50
85
100
130
130
45
85
100
135
160
40
85
100
135
190
35
85
100
135
200
30
85
100
135
200
If the equipment is placed in a "tb" environment (Zone 21), the maximum process
temperatures shall be as follows:
Ta (°C)
Maximum Process Temperature per Temperature Class (°C)
60
70
55
100
50
130
45
160
40
190
35
200
30
200
Additionally, the maximum surface temperature of the overall device shall be:
●
If Tprocess ≤ 85°C, maximum surface temperature = 85°C.
●
If Tprocess > 85°C, maximum surface temperature = process temperature.