Siemens SIMOTICS XP 1MB5 SH400, Руководство по эксплуатации, Страница: 78 / 166

6.6.2 Ground the metal shield in the terminal box
If you are using metal-armored cables that are inserted into the terminal or auxiliary terminal
boxes with non-intrinsically safe circuits, then ground the metal shield in the terminal box.
● In terminal boxes with internal grounding part, connect the metal shield to the internal
grounding point.
● In terminal boxes without internal grounding part, connect the metal shield to one of the
green-yellow grounding terminals.
For explosion-protected motors, it is not permissible to use more than one grounding location
for the metal shield.
6.7 Conductor connection
The maximum conductor cross-section that can be connected is 300 mm².
6.7.1 Inserting the cable into the terminal box
The connection cables are inserted into the terminal box via an exchangeable cable entry plate
or cable entry support. The cable glands are not included in the standard scope of supply.
Table 6-3 Cable entry plate versions
Terminal box Cable entry plate with boreholes Option R53 /
Explosion-protected motors
TB3R61 4 x M80 x 2 + 2 x M25 x 1.5
Undrilled 1XB1631 4 x M80 x 2 + 2 x M25 x 1.5
1XB7750 8 x M72 x 2 + 3 x M25 x 1.5
Procedure
1. Unscrew the cable entry plate.
2. When required, drill the required number of holes or threads in the required size into the
cable entry plate. Ensure that the cable entry plate can be assembled after drilling and that
it features sufficient stiffness.
3. Install the cable glands required, taking into account the manufacturers data relating to
installation steps - including tightening torques and the suitability for the ambient conditions.
4. Route the cables through the cable glands - and carefully ensure that the cables and
conductors are strain relieved.
5. Fit the cable entry plate to the terminal box with the assembled cables.
For the TB3R61 and 1XB1631 terminal boxes, ensure a perfectly flat contact surface for the
cover, to ensure that the IP degree of protection is complied with.
Electrical connection
6.7 Conductor connection
1MB5 SH 400/450
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Operating Instructions, 05/2019, A5E45959221A