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2.7
Power Supply Installation
2.7.1
Overview
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.
The switches can be powered by using the same DC source used to power other
devices. A DC voltage range of 12 to 48 VDC (Non PoE) or 24 to 48 VDC (PoE) must
be applied between the V1+ terminal and the V1- terminal (PW1), see the following
illustrations. A Class 2 power supply is required to maintain a UL60950 panel listing.
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-7710E-2C/EKI-7710E-2CI/EKI-7710G-2C/EKI-7710G-2CI support 12 to 48 VDC
and EKI-7710E-2CP/EKI-7710E-2CPI/EKI-7710G-2CP/EKI-7710G-2CPI support 24
to 48 VDC. Dual power inputs are supported and allow you to connect a backup
power source.
2.7.2
Considerations
Take into consideration the following guidelines before wiring the device:
The Terminal Block (CN1) is suitable for 12-24 AWG (3.31 - 0.205 mm
value 7 lb-in.
The cross sectional area of the earthing conductors shall be at least 3.31 mm
Calculate the maximum possible current for each power and common wire.
Make sure the power draw is within limits of local electrical code regulations.
For best practices, route wiring for power and devices on separate paths.
EKI-7710 Series User Manual
Single DC Power
P2 P1
Chassis
GND
(pane)
One DC Supply
Figure 2.15 Power Wiring for EKI-7710 Series
Redundant DC Power
P2 P1
Chassis
GND
(pane)
Dual DC Supplies
21
2
). Torque
2
.
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