Power Requirements - Allied Telesis IE340 Series Installation Manual

IE340 Series Installation Guide
Power
Requirements
50
Caution
The output power of the IE048-480 power supply is affected by the
input voltage and ambient temperature. Refer to the data sheet for
the derating curve.
The IE048-480 power supply is sold separately.
The IE340 switches have the following power supply requirements:
The DC input voltage for the IE340-12GP, IE340-12GT, and

IE340-20GP switches has to be between 18 and 57Vdc; this range
is absolute with no tolerance.
The DC input voltage for the IE340L-18GP switch has to be

between 46 and 57Vdc; this range is absolute with no tolerance.
DC input voltage has to meet the requirements in Table 9 on

page 51 to enable PoE sourcing.
DC input voltage must not exceed 57Vdc to avoid the device

breakdown.
DC input current has to be available continuously over the

operating temperature range and required consumption.
Note
The IE340 switches can be powered by one or two power supplies.
A single power supply that meets the above requirements can fully
power the switches. Adding a second power supply adds power
redundancy.
IE340 PoE PSE switches can operate in the following modes:
Non-PoE mode: All network devices connected to the switch do

not require PoE sourcing.
PoE mode: Some or all network devices connected to the switch

require PoE sourcing, in accordance with std. IEEE 802.3at Type 1
"PoE."
PoE+ mode. Some or all network devices connected to the switch

require PoE sourcing, in accordance with std. IEEE 802.3at Type 1
and or Type 2 "PoE+."
Table 9 on page 51 describes the input voltage requirements; the listed
voltage ranges are absolute with no tolerance.