SE3-USER-M
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1st Edition, Dec. 2023
SE3 Series Industrial Unmanaged Ethernet Switches User Manual
Redundant Power Inputs
All SE3-series industrial Ethernet switches have dual redundant power inputs. Connecting two
independent power sources reduces the risk of down time resulting from power supply failure.
For information on wiring power to the industrial Ethernet switches, please see "Power Wiring" on page 14.
Power Fault Alarm
Most of the SE3-series industrial Ethernet switches oer a power fault alarm contact to signal loss of power.
e alarm is a normally open contact that is held closed by the presence of power on both power inputs.
On loss of one or both power sources, the alarm contact will open. For proper operation of the alarm
contact when using a single power input, jumper the two power inputs together. For information on wiring
the power fault alarm contact, please see "Alarm Wiring" on page 15.
DIP Switches (Model SE3-SW5UG-1P-T Only)
Model SE3-SW5UG-1P-T has two DIP switches, located on the front of the unit.
1 2
ON
SE3-SW5UG-1P-T DIP Switch Settings
DIP Switch Description ON OFF
1 Enables or disables Energy Efcient Ethernet. Enable Disable
2 SFP module port speed 100Mbps Module Native Speed
NOTE: A change in the dip switch settings will not take eect until the switch is power cycled. So, if a setting is
changed while the device is powered, the old setting will remain active until power is removed and reapplied.
SFP module port speed:
Model SE3-SW5UG-1P-T can optionally force a compatible Gigabit SFP module to operate at 100Mbps.
e DIP switch should normally be in the OFF position for both 1Gbps and 100Mbps SFP modules, to
allow them to operate at their native speed. Set the switch to the ON position to force a 1Gbps module to
operate at 100Mbps. is may be useful, for instance, to connect to legacy 100Mbps equipment without
requiring purchase of an additional SFP module. is feature may not be compatible with all SFP modules,
but does work with the Gigabit SFP modules available at www.automationdirect.com.
Energy-Eicient Ethernet (EEE):
Energy-Ecient Ethernet (EEE) is a set of enhancements dened by the IEEE 802.3az standard.
Its primary objective is to curtail power usage during periods of reduced data activity or idleness. By
dynamically adapting power consumption according to actual data trac demands, EEE reduces power
consumption by up to 30%.
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