3Com 5500-EI Getting Started Guide - Page 40

Connecting the Earthing Cable,

Page 40 highlights

40 CHAPTER 2: INSTALLING THE SWITCH Figure 17 RPS Connection to the Switch + - NULL ~100-240V;50/60Hz;1.0A -48 -60V;2.0A NULL -48 -60V;2 0A Null Pinout - + Cable Tie 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 Use the earthing cable that accompanies your switch if the length is Earthing Cable 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).

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40
C
HAPTER
2: I
NSTALLING
THE
S
WITCH
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;2 0A
Null
+
-
Pinout
Cable Tie