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Installing DC PEMs
DC-Input Power Wiring
Warning:
• Ensure that all power is OFF from the DC circuit. Locate the circuit breaker on the panel board
that services the DC circuit. Flip the circuit breaker to the OFF ( O ) position.
• When wiring the unit, the ground connection must always be made first and disconnected last.
• The proper wiring sequence is ground/negative to ground/negative and positive/return to
positive/return.
• Use a #6 AWG for the -48 and RTN power connections.
Preparing the Power Cable
Connect the VDC and RTN studs on the DC terminal block with power cables terminated with lugs
such as a Panduit LCC6-10A-L copper, standard barrel, 2-hole lug with two .200-inch (
diameter holes on a .625-inch (1.6 cm) spacing
The other non-terminated end of the power cables must be prepared according to your local safety
codes. The length of the power cable depends on the location of the router and proximity to the
power source.
Page 68
All measurements in inches.
Figure 17: DC Terminal Block Lug
2
1
Figure 18: Preparing the DC Cable
(Figure
17).
0.250
.200
2 Holes
0.750"
.625
SR12030
SR10030
.508
cm)
7450 ESS-7
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