Installation Guide

Table Of Contents
c. Slide the spade terminal of the positive wire (–48 V RTN) under the captive square washer on the
positive terminal (labeled RTN).
See Figure 413.
(+)
(–)
RTN
-48V
Figure 413: Connecting the DC Power Cables: Part 1
d. Tighten both screws on the terminal block to 15.9 in-lb (1.8 N-m) as shown in Figure 414.
Figure 414: Connecting the DC Power Cables: Part 2
6. Slide the cover into place over the terminal block.
7. Energize the DC circuit.
Replacing a Summit 450 W or 550 W DC Power Supply
Summit 550 W power supply units (PSUs) are available with either front-to-back or back-to-front
airflow. If you install two PSUs, both must have the same airflow direction.
Replacing a Summit 450 W or 550 W DC Power Supply
Replacing DC Power Supplies
478 Summit Family Hardware Installation Guide