Connecting To Dc Power - Alcatel-Lucent 7210 SAS-T Installation Manual

Installing Your Switch
Step 6
Notes:
be lit if the top slot has a PS plugged in and PS2 will be lit if the bottom slot has a PS plugged
in.

Connecting to DC Power

The 7210 SAS-T chassis supports the -48V and +24V DC power modules. Hence, the steps below
are applicable for either the -48V or the +24V DC power modules.
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.
Notes: Do NOT install BOTH the -48V and the +24V AC PEMs in the same chassis.
Notes: If a single power feed (either #A or #B) is connected to provide power to the system, it supplies power
to both the power supplies, if both of them plugged in. The DC power feeds, #A and #B, are internally bridged
using a diode.
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
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Ensure that PS1 and PS2 LEDs on the 7210 SAS-T front panel are lit if both the primary
and the redundant power supply has been plugged in.
If only one of the power supplies is plugged in, either PS1 or PS2 will be lit. PS1 will
Before a VDC power supply module can be used, you must connect an external DC power
source to the DC power connection on the left side of the front panel (see
external DC power supply 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 Appendix A: Specifications on page
7210 SAS-T Installation Guide
Figure 1). The
79).