SMA Solar Technology AG
7. Tighten the three connecting screws of the DST
printed circuit board (TX20, torque: 3.5 Nm
(31.0 in-lb)). When doing so, follow the sequence
shown.
8. Tighten the screws on the two DC connections
(TX20, torque: 6.0 Nm (53.1 in-lb)). Observe the
polarity of DC- (blue) and DC+ (red).
Replacement Manual
7 Replacing the DST Assembly
3
1
STP50-DC-EMV-DST-RM-xx-12
2
25