32 | Installing Backup Power
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Connecting the S50V DC-to-DC Cable
The PSU kit for the S50V includes two power cables — the cable that connects the PSU to the AC source
and the DC-DC cable that connects the PSU to the terminal block on the back of the S50V. The DC-DC
cable length is 1.5 meter (5 feet), with a keyed plug connector at one end that connects to the PSU, and, at
the other end, individual wires that connect to the DC terminal leads in the rear of the S50V (
Figure 5-7
).
2 Join the two units with the supplied twinning plate (the small, flat, I-beam-shaped metal adapter with four screw
holes), using two screws on each side of the plate through the front inside corners of the two switches. Orient the
adapter with the cross-bars of the I-beam horizontally, so that the fan and power LEDs in the left-hand PSU are
not obscured.
Figure 5-5. Twinning Plate Oriented over Two PSUs
3 As shown on the left side of
Figure 5-6
, attach the rack ears to the rack with the supplied screws or cage nuts,
depending on the style of your rack.
Figure 5-6. Two PSUs Mounted Side-by-Side
Step Task
Power
Fan
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