Advantech EKI-7720 Series, User Manual

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EKI-7720 Series User Manual 17
2.7 Power Supply Installation
2.7.1 Overview
The switches can be powered by using the same DC source used to power other
devices. A DC voltage range of 12 to 48 V
DC
must be applied between the V1+ termi -
nal and the V1- terminal (PW1), see the following illustrations. The chassis ground
screw terminal should be tied to the panel or chassis ground. A redundant power
configuration is supported through a secondary power supply unit to reduce network
down time as a result of power loss.
EKI-7720 Series support 12 to 48 V
DC
. Dual power inputs are supported and allow
you to connect a backup power source.
Figure 2.16 Power Wiring for EKI-7720 Series
Warning!
Power down and disconnect the power cord before servicing or wiring
the switch.
Caution! Do not disconnect modules or cabling unless the power is first switched
off.
The device only supports the voltage outlined in the type plate. Do not
use any other power components except those specifically designated
for the switch device.
Caution!
Disconnect the power cord before installation or cable wiring.
P2 P1
Chassis
GND
(pane)
One DC Supply
P2 P1
Chassis
GND
(pane)
Dual DC Supplies
Single DC Power Redundant DC Power