Electrical Data; Thermal Data - Siemens SITRANS LR110 Sicherheitshinweise

•
AVERTISSEMENT – DANGER POTENTIEL DE CHARGES ELECTROSTATIQUES – VOIR
INSTRUCTION
•
For media with a conductivity smaller than 10
– The level measuring instrument must not be used in highly charge generating processes, e.g.
mechanical friction and separation processes, spraying of electrons, etc.
– 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 0, 4 ...20 mA/HART
Supply and signal circuit:
Two-wire connection cable and shielding
Supply [+] black
Supply [-] white
Shielding: Wire mesh
Power consumption
The shielding (wire mesh) must be earthed on the supply side.
Electronics 3, 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
14
S/m applies:
-8
Ignition protection type encapsulation "mb", Protection by enclo-
sure "Ex t"
Supply via a circuit with limited power (max. 100 W, see operating
instructions), e.g. a class 2 power supply unit common in North
America
U = 12 ... 35 V, non-intrinsically safe
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 operating
instructions), e.g. a class 2 power supply unit common in North
America
U = 8 ... 30 V, non-intrinsically safe
U = 30 V
m
< 1 W
Permissible process temperature
range on the antenna in zone 1
(EPL Gb)
-20 ... +80 °C
SITRANS LR110, LR120 • Dust protection by enclosure "t"
ATEX
Permissible ambient temperature
range on the electronics housing
in zone 1 (EPL Gb)
-20 ... +80 °C