Juniper EX4100 Hardware Manual page 152

• Phillips (+) screwdriver, number 2
• Slotted (-) screwdriver
You install the power supply in the power supply slot in the rear panel.
WARNING: DC-powered switches are intended for installation only in a restricted-
access location.
To connect DC power to the switch:
1. Ensure that the input circuit breaker is open so that the cable leads do not become active while you
connect DC power.
NOTE: The DC power inlet in the switch has two terminals labeled + and – and has a terminal
to connect to earth ground.
NOTE: The + terminal is referred to as +RTN and the – terminal is referred to as –48 V in
Power Wiring Sequence Warning
2. Use the screwdriver to loosen the screws on the terminal connector.
3. Strip 0.25 inch (6.35 mm) of the insulator from one end of the power cable. Attach the two wires to
the wire pins.
4. Secure the wire pins to the appropriate terminals on the terminal connector by using the screws from
the terminal connector (see
Figure 90: Securing Wire Pins to the Terminals on the Terminal Connector
• To connect the wire pins to the appropriate terminals on the terminal connector:
a. Connect the positive (+) wire pin to the + terminal on the terminal connector.
b. Connect the negative (–) wire pin to the – terminal on the terminal connector.
DC Power Electrical Safety Guidelines
and
Figure 90 on page 143).
DC
.
143