Cisco AS5400XM Quick Start Manual page 29

Note the orientation of the DC power supply. The power supply cord should have three wires: 48 VDC Return,
Step 2
–48 VDC, and a safety ground (green wire). (See Figure 38, Figure 39, and Figure 40.)
Warning The illustration shows the DC power supply terminal block. Wire the DC power supply using the appropriate lugs
at the wiring end, or with no lugs, as illustrated. The proper wiring sequence is ground to ground, positive to
positive, and negative to negative. Note that the ground wire should always be connected first and disconnected
last. Statement 197
Figure 38 Cisco AS5350XM Universal Gateway DC Power Supply Connections—Single Power Supply
Power switch
Source A - NEG
Source A - RTN
Source B - NEG
To DC source
DC connector
Ground
Source B - RTN
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