Interlogix NS3550-24T/4S - Manual (Page 5)

5
1. Insert positive / negative DC power wires into the contacts 1 and 2 for DC POWER 1, or 5 and 6 for DC POWER 2.
2. Tighten the wire-clamp screws to prevent the wires from loosening.
1 2 3 4 5 6
DC 2 DC 1
+ - + -
The wire gauge for the terminal block should be in the range between 12 ~ 24 AWG.