Technical information

Ultrasonic Level Sensor LUC-M**
Auxiliary energy
DOCT-0805F 01/2010 185414
8
The digital communication signal is transmitted to the bus via a 2-wire connection. The bus also
provides the auxiliary energy. Please use 2-wire twisted pair cable with screen.
Fieldbus plug connector For the versions with fieldbus plug connector, the signal line can be connected without opening the
housing.
Pin assignment of the M12 plug connector (PROFIBUS PA plug)
Supply voltage HART, 2-wire
The following values are the voltages across the terminals directly at the instrument:
1)
Start-up current 11 mA
HART, 4-wire
PROFIBUS PA
3
4
1
2
– +
T-Box
PAL
PROFIBUS PA
Pin Meaning
1 Ground
2 Signal +
3 Signal -
4 not connected
13
2
4
Version Current
consumption
Terminal voltage
minimum
Terminal voltage
maximum
2-wire HART
standard 4 mA 14 V 36 V
20 mA 8 V 36 V
EEx ia 4 mA 14 V 30 V
20 mA 8 V 30 V
EEx d 4 mA 14 V 30 V
20 mA 11 V 30 V
fixed current,
adjustable, e. g. for
solar power
operation
(measured value via
HART)
standard
11 mA 10 V 36 V
EEx ia
11 mA 10 V 30 V
fixed current for
HART multidrop
mode
standard 4 mA
1)
14 V 36 V
EEx ia 4 mA
1)
14 V 30 V
Version Voltage Max. load
DC 10.5 V ... 32 V 600 Ω
AC 50/60 Hz 90 V ... 253 V 600 Ω