FastIron GS Compact Layer 2 Switch Hardware Installation Guide
DC Power Supply
Plug on rear of power supply engages connector
7.Press the two latches near the edges of the supply outward to lock the supply in place.
8.If you removed the receptacle for the positive and negative terminals,
9.Connect the ground, positive and negative wires as follows:
•Slip the ground wire into the opening under the 
marking until the wire is fully in place, then use the crimper to crimp the lug snugly onto the wire. Gently pull the lug away from the wire to verify that the lug is securely fastened.
•Connect the
•Connect the 48 RTN lead to the positive (+) terminal and tighten the positive terminal screw.
The following illustration shows how to connect the wires on a DC power supply.
–
Ground 
+
10. Pull gently on each wire to make sure it is securely fastened in the connector.
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