3Com 3CR17561-91-US - Switch 4500 26PORT Managed 24 10/100 2 Gbe Stackable RJ45 Getting Started Manual - page 32

32

C

HAPTER

 2: I

NSTALLING

THE

 S

WITCH

WARNING: Ensure that the circuit breaker in the RPS is in the open (off) 

position when connecting the cable to the RPS and the cable and 

connector to the Switch.

WARNING: You must ensure that the positive terminal on the Switch is 

connected to the positive (common) terminal of the RPS and that the 

negative terminal on the Switch is connected to the negative (circuit 

breaker) terminal of the RPS.

Figure 9 shows how to connect the power supply to the RPS socket in the 

back of the Switch. Use the cable tie supplied with your Switch to support 

the cable at the rear of the RPS connector as shown.

Figure 9   RPS Connection to the Switch

When the RPS is connected to the Switch, the circuit breaker in the RPS 

can be moved to the closed (on) position and the Switch will be powered 

by the -48V DC power.

+ -

NULL

-48 -60V

;2.0A

100-240V

;50/60Hz

;1.0A

~

NULL

-48 -60V;2 0A

Null

+

-

Pinout

Cable Tie