Wiring Plan, Single Chamber Housing; Wiring Plan, Double Chamber Housing - Siemens SITRANS LG250 Operating Instructions Manual

Electronics and terminal
compartment
PBD-51041388
6. Insert the wire ends into the terminals according to the wiring plan
Information:
Solid cores as well as flexible cores with wire end sleeves are
inserted directly into the terminal openings. In case of flexible cores
without end sleeves, press the terminal head with a small screwdriver;
the terminal opening is freed. When the screwdriver is released, the
terminal closes again.
7. Check the hold of the wires in the terminals by lightly pulling on
them
8. Connect the screen to the internal ground terminal, connect the
outer ground terminal to potential equalisation
9. Tighten the compression nut of the cable entry gland. The seal
ring must completely encircle the cable
10. Screw the housing lid back on
The electrical connection is finished.
Information:
The terminal block is pluggable and can be removed from the
electronics. To do this, lift the terminal block with a small screwdriver
and pull it out. When reinserting the terminal block, you should hear it
snap in.
5.3

Wiring plan, single chamber housing

The following illustration applies to the non-Ex, Ex-ia and Ex-d-ia
version.
1
Fig. 13: Electronics and terminal compartment, single 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
5.4

Wiring plan, double chamber housing

The following illustrations apply to the non-Ex as well as to the Ex-ia
version.
SITRANS LG250 - Operating Instructions
4...20mA
+
1 2
5 6 7 8
( ) (-)
2
3
4
23