Chapter 7: Installing Summit External Power Supplies
Summit Family Switches Hardware Installation Guide
320
The pins must align properly for the cable to completely connect. Do not force the cable into the
socket until the keyway is aligned properly. Refer to Figure 260 for the DC wiring harness connector
and to Figure 261 for the DC power socket location on the rear of the EPS-150DC unit.
Figure 261: Connecting the Input Cable to the EPS-150DC Unit
3 Tighten the retainer nut on the connector until it is finger tight.
Connecting the EPS-150DC to a Switch
If you are connecting the EPS-150DC unit to a Summit X450a-48tDC switch, you must ground the
switch before connecting power. For instructions on grounding the switch, see “Grounding a Summit
DC-Powered Switch” on page 236.
WARNING!
Always be sure that the DC circuit is de-energized before connecting the EPS-150DC to the switch.
One end of the EPS-150DC cord has a keyed connector to ensure correct alignment of the connector
(Figure 262). The key is a plastic tab on the connector housing that fits into the EPS-150DC unit.
Figure 262: EPS-150DC Redundant Power Cord with Connector Key
To connect the EPS-150DC to a switch:
1 Verify that the DC power is turned off at the source.
2 Identify the keyed end of the redundant power cable.
3 Holding the keyed connector so that the side labeled “Top” is facing up, connect the EPS-150DC
redundant power cable to the power supply unit (see Figure 263).
4 Align and tighten the connector retaining screws to secure the cable connector to the power supply
unit.
5 Connect the other end of the redundant power cord to the Extreme switch.
The connector fits the slot in only one direction.
6 Align and tighten the captive retaining screws to secure the cable connector to the switch.
EPS-15DC_001C
EPS-150DC
in EPS-T2
DC wiring
harness
Collin's
ES4K027
XM_055
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