3Com 5500-EI, 5500G-EI - page 40

40 CHAPTER 2: INSTALLING THE SWITCH
Figure 17 RPS Connection to the Switch
When the RPS is connected to the switch, you can move the circuit
breaker in the RPS to the closed (on) position and the switch will be
powered by the -48V DC power.
The -48V DC power takes priority over the AC mains and powers the
switch if it is connected.
Connecting the
Earthing Cable
Use the earthing cable that accompanies your switch if the length is
suitable. Alternatively use the earthing cable specification as defined in
Appendix C on page 127.
The earthing cable is only required if the switch is powered by the RPS
only.
The recommended cable length should not exceed three metres (9.84
feet).
+-
NULL
-48 -60V;2.0A
100-240V;50/60Hz;1.0A
~
NULL
-48 -60V;20A
Null
+
-
Pinout
CableTie
10014925-AD_S5500_GSG.book Page 40 Thursday, August 16, 2007 12:29 PM