Connecting To Dc Power - Alcatel-Lucent 7210 Installation Manual

Connecting to DC Power

Below the DC power entry block is an additional chassis ground point for attaching a
Notes:
DC power chassis ground if required by local electrical codes. The ground point should be connected
with an M4 screw and a terminal lug as specified by local electrical codes.
To connect DC power:
Step 1
WARNING:
Before wiring the DC plug or connecting power to the switch, ensure that power to the feed lines is
turned off at the supply circuit breaker or disconnected from the power bus.
Step 2
Step 3
Step 4
WARNING:
If the power leads are plugged into the wrong holes, the power supply will not work properly and
may damage the switch.
Step 5
Step 6
7210 SAS-X Installation Guide
The external DC power supply used must be between -36 to -72 VDC, and protected with
a circuit breaker.
To provide adequate circuit protection between the DC power supply and the switch, all
intermediate wiring and circuitry should be rated to carry a load at least two times the
maximum rating for this switch (see
The wiring between the DC power supply and the switch must be stranded copper wire
within the range of 10 to 24 AWG.
Connect the -48 VDC power feed using the -48 VDC input and RETA/B (return) lines for
power source A and B, respectively. Insert the wires into the DC input plug (using a small
flat-tip screwdriver). Color code the wiring according to local standards to ensure that the
input power and ground lines can be easily distinguished.
After the power source is tuned on, set the power button on the front of the power supply
module to the ON position (marked "— ').
Check the LEDs on the power supply module as the switch is powered on to verify that
the Input LED indicating external power status is on, and that the Output LED indicating
internal power conversion is on. If not, recheck the power supply and power cable
connections at the supply source and at power supply module.
Installing the 7210 SAS-X
Appendix A: Specifications on page 65).
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