Mounting The Power Unit - SMA SB Series Replacement Manual

7 Mounting the Power Unit

7 Mounting the Power Unit
1. Ensure that the DC load-break switch is switched off (see Section 5, page 10).
2. Plug the new Power Unit into the Connection Unit. Ensure that the screw holes on the left and
right sides of the Power Unit are directly over those of the Connection Unit; and the cables
protruding from the Power Unit must not be pinched.
3. Tighten two screws with two washers on the right and left side of the Power Unit (TX25)
(torque: 6 Nm ± 0.3 Nm (53 in-lb ± 2.65 in-lb)).
4. If the enclosure lid of the new Power Unit is a transport lid (see information on the enclosure
lid), replace the transport lid of the new Power Unit with the enclosure of the defective Power
Unit:
• Unscrew all screws of the upper enclosure lid
(TX25) and remove it.
• Position the upper enclosure lid with the six
screws and serrated conical spring washers on
the enclosure and tighten it in the specified
order (TX25, torque: 6 Nm (53 in)).
5. Pull the ribbon cable used to connect the
communication assembly to the Power Unit into the
Connection Unit, and plug it into the jack on the
communication assembly.
14 SBxx-1SP-US-41-PU-RM-xx-10
SMA Solar Technology AG
1
6
4
3
2
5
COM
M1 M2
X1 X2
ANT.
FCC ID: SVF-KP20
IC: 9440A-KP20
A B D-IN
SPS
Replacement Manual
AC-out SPS