Interlogix NS3550-8T-2S User Manual - Manual (Page 31)

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2.3 Wiring the Power Inputs
The 6-contacts terminal block connector on the top panel of Industrial Managed Switch is used for two DC redundant power
inputs. Please follow the steps to insert the power wire. The PWR1 is 1(-) & 2(+) and PWR2 is 5(-) & 6(+) contact.
Remember: Tighten the wire-clamp screws for preventing the wires from loosening..
1 2 3 4 5 6
Power 1 Fault Power 2
- + - +
Figure 2-4: 6-Contacts of Terminal Block Connector
1. The wire gauge for the terminal block should be in the range of 12 ~ 24 AWG.
2. Follow any of the procedures like inserting the wires or tighten the wire-clamp screws.
Ensure the power is OFF to prevent from getting an electric shock.
2.4 Wiring the Fault Alarm Contact
The fault alarm contacts are in the middle (3 & 4) of the terminal block connector as the picture shows below. Inserting the wires,
the Industrial Managed Switch will detect the fault status of the power failure, or port link failure (available for managed model).
The following illustration shows an application example for wiring the fault alarm contacts
Insert the wires into the fault alarm contacts
1. The wire gauge for the terminal block should be in the range of 12 ~ 24 AWG.
2. Follow any of the procedures like inserting the wires or tighten the wire-clamp screws.
Ensure the power is OFF to prevent to get an electric shock.
2.5 Cabling
 10/100/1000Base-T and 100Base-FX / 1000Base-SX/LX