21
SE400 SERIES
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 must be applied between the V1+ terminal and the V1- ter-
minal (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 chas-
sis ground. A redundant power configuration is supported through a secondary power supply
unit to reduce network down time as a result of power loss.
SE400 Series support 12 and 48 VDC. Dual power inputs are supported and allow you to con-
nect a backup power source.
Figure 23: Power Wiring for SE400 Series
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
2
). Torque value 7
lb-in.
The cross sectional area of the earthing conductors shall be at least 3.31 mm
2
.
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.
Do not bundle together wiring with similar electrical characteristics.
Make sure to separate input and output wiring.
Label all wiring and cabling to the various devices for more effective management and
servicing.
Considerations
Note!
Routing communications and power wiring through the same conduit may cause
signal interference. To avoid interference and signal degradation, route power
and communications wires through separate conduits.
P2 P1
Chassis
GND
(pane)
One DC Supply
P2 P1
Chassis
GND
(pane)
Dual DC Supplies
Single DC Power
Redundant DC Power