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H
I
ARDWARE
NSTALLATION
EKI-9316 / EKI-9312 supports 24 and 48 VDC and EKI-9316P / EKI-9312P supports 48 VDC
(for PoE) and 50 VDC (for PoE+). For PoE sourcing (PSE) operation, a power range of 46 to
57 VDC is necessary. Make sure the 48 VDC supply is rated at 15.4W per
PoE port and the 50 VDC supply is rated at 30W per PoE+ port. Dual power inputs are
sup-ported and allow you to connect a backup power source.
1.9.2 Considerations
Take into consideration the following guidelines before wiring the device:
Screws should not be overly tightened, max. torque value: 5 lb-in [0.57 Nm].
Wire sizes: between 24 AWG and 12 AWG.
Turn off the power to the switch.
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.
Unscrew and remove the terminal block to prevent a short circuit to the device.
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.
20
Single DC Power
OK P2 P1
Alarm
Output
Load
Chassis
(opt.)
GND
(pane)
One DC Supply
Figure 1-14. Power Wiring for Managed Switches
Single DC Power
P2 P1
Chassis
GND
(pane)
One DC Supply
Figure 1-15. Power Wiring for Unmanaged Switches
Redundant DC Power
OK P2 P1
Alarm
Output
Load
Chassis
(opt.)
GND
(pane)
Dual DC Supplies
Redundant DC Power
P2 P1
Chassis
GND
(pane)
Dual DC Supplies
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