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DGS-3120 Series Layer 3 Managed Gigabit Switch Hardware Installation Guide
14
Connecting DC Power to the DGS-3120-24SC-DC
Follow the instructions below to connect the DC power supply of the DGS-3120-24SC-DC to the DC power source.
Figure 2-4 Close-up view of Power Receptacle
1. The DC power supply has a three-terminal wiring block consisting of a positive (+), a negative (-) and a safety
ground terminal.
2. Firmly attach the DC power to the negative and positive contacts on the wiring assembly.
a. The negative pole (-) connects to the
-48V
contact.
b. The positive pole (+) connects to the
-48V Return
contact.
c. If available, an earth ground may be connected to the center contact post.
3. Tighten the contact screws to secure the connection.
NOTE
: Use a minimum 18 gauge (AWG) wire. All power connection wiring should conform to the
rules and regulations in the National Electrical Code (NEC), as well as any local codes. A branch
circuit over current protection must be rated between 2A to 10A.
CAUTION
: This equipment must be grounded.
CAUTION
: This equipment must be installed and maintained by qualified service personnel only.