Switch-On Phase - Siemens SITRANS LG270 Operating Instructions Manual

Terminal compartment
PBD-51041071
1
Fig. 13: Terminal compartment - double chamber housing
1 Voltage supply, signal output
2 For display and adjustment module or interface adapter
3 For external display and adjustment unit
4 Ground terminal for connection of the cable screen
5.5

Switch-on phase

After SITRANS LG270 is connected to the bus system, the instrument
carries out a self-test for approx. 30 seconds. The following steps are
carried out:
•
Internal check of the electronics
•
Indication of a status message, e.g. "F 105 Determine measured
value" on the display or PC
•
Status byte goes briefly to fault value
Then the actual measured value is outputted to the signal cable. The
value takes into account settings that have already been carried out,
e.g. default setting.
SITRANS LG270 - Operating Instructions
Bus
+
1
2
5 6 7 8
( ) (-)
2
3
4
23