Supplementary Electronics; Switch-On Phase - Siemens SITRANS LG250 Operating Instructions Manual

Plug M12 x 1 for VE-
GADIS 61
Supplementary electron-
ics - Additional current
output
26
Fig. 19: Top view of the plug connector
1 Pin 1
2 Pin 2
3 Pin 3
4 Pin 4
Contact pin
Pin 1
Pin 2
Pin 3
Pin 4
5.7

Supplementary electronics

To make a second measured value available for use, you can use the
supplementary electronics - additional current output.
Both current outputs are passive and need a power supply.
The additional current output (II) cannot be used in safety-instrument-
ed systems according to SIL.
Fig. 20: Terminal compartment, double chamber housing, supplementary elec-
tronics - additional current output
1 Current output (I) - Voltage supply of the sensor and signal output (with
HART)
2 Additional current output (II) - Voltage supply and signal output (without
HART)
3 Ground terminal for connection of the cable screen
5.8

Switch-on phase

After connecting the instrument to power supply or after a voltage
recurrence, the instrument carries out a self-check for approx. 30 s:
SITRANS LG250 - Operating Instructions
4
1
Colour connection ca-
ble in the sensor
Brown
White
Blue
Black
I
4...20mA
+
1 2
( ) (-)
3
1
3
2
Terminal, electronics
module
5
6
7
8
I I
4...20mA
+
7 8
( ) (-)
2
PBD-51041388