SE3-USER-M
14
1st Edition, Dec. 2023
SE3 Series Industrial Unmanaged Ethernet Switches User Manual
Power and Alarm Wiring
Power Wiring
WARNING: BEFORE PERFORMING ANY WIRING TO THESE SWITCHES MAKE SURE...
• THE AREA IS CURRENTLY NONHAZARDOUS (ESPECIALLY WHEN WORKING IN CLASS 1, DIV 2 OR ZONE 2 HAZARDOUS
LOCATIONS).
• POWER IS OFF TO THE SWITCH.
• THE SCREW TERMINAL BLOCK IS UNPLUGGED. THIS IS ESPECIALLY IMPORTANT ON THE METAL HOUSED UNITS.
CONNECTING OR DISCONNECTING WIRES TO THE SCREW BLOCK WHEN IT’S IN PLACE AND POWER IS TURNED ON CAN
ALLOW THE SCREWDRIVER TO SHORT THE POWER TO THE CASE.
Terminal Block Power Inputs
e switch can be powered from the same source that is used to power your other devices. To maintain the
UL listing, this must be a Class 2 power supply. Power needs to be applied between the V1+ terminal and
the V1- terminal as shown below. e chassis screw terminal should be tied to panel or chassis ground. To
reduce down time resulting from power loss, the switch can be powered redundantly with a second power
supply as shown below. e switch is equipped with reverse power protection, but care should be taken to
connect the positive and negative terminals correctly. For the non-PoE models, a recommended DC power
supply is AutomationDirect.com part number PSL-24-030.
Power Details
Power Input
Redundant input terminals, removable terminal block
Input Voltage
Refer to Technical Specications tables on pages 19–21
Reverse Power Protection
Yes
Wire Size and Torque
20–18 AWG, copper conductors only,125°C;
Wire strip length 7mm;
Torque: 7 lb·in [0.79 N·m]
Power Consumption
Refer to Models tables on pages 4–5.
Relay Contact
24VDC, 1A resistive, open on fault
(not present on SE3-SW5U, SE3-SW5U-T)
NOTE: If only one power supply is used, jumper V1+ to V2+ and V1- to V2- to eliminate power fault alarm.
Redundant DC Power
Chassis
GND
(panel)
Optional Dual DC Supplies
V1+ V2-V1- V2+
–
+
–
+
PWR1 PWR2FAULT
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