Finishing Connection Work; Connecting The Auxiliary Circuits; Selecting Cables; Bringing Cables Into The Auxiliary Terminal Box And Routing Them - Siemens 1LA8 Operating Instructions Manual

6.4.12

Finishing connection work

1. Before closing the terminal box, please check that:
2. Close the terminal box with the cover fixing screws, see chapter Tightening torques for
6.5

Connecting the auxiliary circuits

6.5.1

Selecting cables

Take the following criteria into account when selecting the connecting cables for the auxiliary
circuits:
● Rated current
● Rated voltage
● System-dependent conditions, such as ambient temperature, routing type, cable cross-
● Requirements according to IEC/EN 60204‑1
6.5.2

Bringing cables into the auxiliary terminal box and routing them

The required data for connecting the auxiliary circuits is located on the terminal diagram on
the inside of the respective auxiliary terminal or terminal box cover.
● In some cases a terminal strip is installed in the main terminal box for the auxiliary circuit
● The required stripped length on conductors for auxiliary terminals differs according to
SIMOTICS TN Series N-compact 1LA8
Operating Instructions 05/2016
– The electrical connections in the terminal box have been made in accordance with the
specifications above and tightened with the correct tightening torque.
– The machine is connected in such a way that it rotates in the direction specified.
– The inside of the terminal box is clean and free of any cable debris, dirt and foreign
bodies.
– All of the seals and sealing surfaces of the terminal box are intact and in a good condition.
– Any cable entries which are not used are sealed and the sealing elements are tightly
screwed in (i.e. so that they can only be removed using suitable tools).
– The connecting cables are laid in an open arrangement, so that the cable insulation
cannot be damaged during operation.
screw and bolt connections (Page 139).
section as defined by required length of cable, etc.
connections.
terminal type (6 to 9 mm). When the length is correct, the conductor should reach the stop
in the terminal and at the same time the conductor insulation should reach the contact part
of the terminal.
Electrical connection
6.5 Connecting the auxiliary circuits
75