SMA NR-PL-BFS5-01 Austauschanleitung Seite 17

SMA Solar Technology AG
6 Installing the BFS assembly
There are sections on this assembly with a safety extra-low voltage circuit (SELV circuit). To ensure
the safety of the circuits, an optical inspection must be carried out before installation.
Procedure:
1. Check the marked area and the area around both
pulse transformers for visible dirt before mounting
the assembly. If dust or other deposits cover the
assembly, it must not be used. Contact the Service
department (see Section 9, page 21).
2. Insert the BFS assembly in the inverter and screw into place using 4 screws from the scope of
delivery (TX20, torque: 3.5 Nm ± 0.5 Nm (30.98 in-lb ± 4.43 in-lb)).
3. Insert all plugs into the respective jacks of the BFS assembly.
4. Push the ribbon cable X1 through the respective opening in the COM assembly mounting
plate. This will prevent the cable being pinched during mounting.
5. Insert the mounting plate of the COM assembly into the inverter. Put the mounting plate onto
the inverter enclosure spacers. Ensure that the spacers match the respective holes in the
mounting plate and that the cables are not trapped beneath the mounting plate.
6. Tighten the 4 mounting plate connecting screws (TX20, torque: 3.5 Nm ± 0.5 Nm (30.98 in-lb
± 4.43 in-lb)).
7. Insert all plugs into the respective jacks of the mounting plate of the COM assembly.
8. Set the ferrite around the ribbon cable X1. When doing so, ensure that the cable is not
trapped and damaged.
Replacement Manual
6 Installing the BFS assembly
STP50-40-BFS-RM-xx-10 17