Siemens SIMOTICS FD 1MM1 Series, Operating And Installation Instructions

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Procedure
When connecting, carefully maintain the minimum clearances and creepage distances.
1. Open the terminal box and cut the cable to the correct length.
The clips of the 1XB7730/1XB7731 terminal boxes can accept cables with maximum
185 mm² cross-section.
2. Prepare the end of the cable depending on the cable and its use. It is not permissible that
the cable connection is subject to external forces.
3. Insulate the conductor ends in such a way that the remaining insulation reaches almost up
to the cable lug.
4. Make sure the terminal clamps
③
,
④
are arranged correctly for the size of the conductor.
Insert the cable into the terminal clamps. Tighten the clamping nuts
⑤
to the tightening
torque as specified in the following table.
Terminal box Tightening torque
GT640 / 1XB1621 / 1XB1631 / 1XB1634 8 Nm
1XB7730 / 1XB7731 4 Nm
1XB7740 / 1XB7750 8 Nm
Figure 6-10 Connection using terminal clamps (schematic diagram)
5. If you have loosened the terminal body clamping bolts
②
, then retighten them with the
following torque:
Terminal box Tightening torque
1XB1621 / 1XB1631 / 1XB1634 40 Nm
GT640 / 1XB7730 / 1XB7731 / 1XB7740 / 1XB7750 20 Nm
For terminal boxes GT640, 1XB7730 and 1XB7731, fasten the terminal element
①
using a
clamping nut M12 on the threaded stud of the terminal support with a torque of 20 Nm.
Lug terminal connections may be installed if ordered accordingly, which are suitable for
connecting flexible and stranded conductors without the use of wire end ferrules. If you wish to
Electrical connection
6.5 Inserting and routing the cables
SIMOTICS FD 1MM1
Operating Instructions 02/2019
87