Vega VEGAPULS C 21 Manual De Usuario página 17

Operation in an explosive dust atmosphere Zone 20 (EPL Da), Zone 20/21 (EPL Da/Db):
Electronics
Two-wire 4 ... 20 mA/
HART
Four-wire Modbus
Operation in an explosive dust atmosphere Zone 21 (EPL Db):
Electronics
Two-wire 4 ... 20 mA/
HART
Four-wire Modbus
VEGAPULS C 21, C 22, C 23 • Dust protection by enclosure "t"
Permissible process
temperature range on
the instrument in zone
20 (EPL Da)
-20 ... +67 °C
-20 ... +67 °C
Permissible process
temperature range on
the instrument in zone
21 (EPL Db)
-20 ... +80 °C
-20 ... +80 °C
ATEX
Permissible ambient
temperature range on
the electronics housing
in zone 20 (EPL Da)
-20 ... +67 °C
-20 ... +67 °C
Permissible ambient
temperature range on
the electronics housing
in zone 21 (EPL Db)
-20 ... +80 °C
-20 ... +80 °C
Max. surface tempera-
ture in zone 20
+121 °C
+142 °C
Max. surface tempera-
ture in zone 21
+134 °C
+155 °C
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