Electrical Data; Thermal Data - Vega VEGAPULS C 21 Manual De Usuario

– In particular, the level measuring instrument must not be mounted in a pneumatic conveying
flow
•
In the case of extremely flammable dusts with a minimum ignition energy (MIE) of less than
3 mJ, the device must not be used in areas where intensive electrostatic charging processes
can be expected
9 Electrical data
Electronics H, 4 ...20 mA/HART
Supply and signal circuit:
Two-wire connection cable and shielding
Supply [+] brown
Supply [-] blue
Shielding: black
Power consumption
The shielding (black) must be earthed on the supply side.
Electronics W, Modbus
Supply and signal circuit:
Four-wire connection cable and shielding
Supply [+] brown
Supply [-] blue
Modbus [+] black
Modbus [-] white
Shielding: black, thick
Power consumption
The shielding (black) must be earthed on the supply side.
10 Thermal data
Operation in an explosive gas atmosphere:
Temperature class
T4 ... T1
6
Ignition protection type encapsulation "mb", Protection by enclo-
sure "Ex t"
Supply via a circuit with limited power (max. 100 W, see operat-
ing instructions), e.g. a class 2 power supply unit common in North
America
U = 12 ... 35 V, non-intrinsically safe
N
U = 35 V
m
< 1 W
Ignition protection type encapsulation "mb", Protection by enclo-
sure "Ex t"
Supply via a circuit with limited power (max. 100 W, see operat-
ing instructions), e.g. a class 2 power supply unit common in North
America
U = 8 ... 30 V, non-intrinsically safe
N
U = 30 V
m
< 1 W
Permissible process temperature
range on the antenna in zone 1
(EPL Gb)
-20 ... +80 °C
IECEx
Permissible ambient temperature
range on the electronics housing
in zone 1 (EPL Gb)
-20 ... +80 °C
VEGAPULS C 21, C 22, C 23