Installation guide

Installing DC Power Supplies | 35
8
Installing DC Power Supplies
The E1200 system requires a minimum of one DC Power Entry Module (PEM) to operate, but 2 are
recommended for redundancy. To comply with safety agency and EMI regulations, you must install
covers on all power supply slots not containing a PEM. Connect the PEMs to the appropriate branch
circuit protection as defined by local electrical codes.
For full redundancy, each PEM must be attached to an independent power source with a dedicated circuit
breaker. For example, the PEM in slot 0 connects to circuit breaker A and the PEM in slot 1 connects to
circuit breaker B.
The E1200 chassis contains two DC PEM slots, as shown in
Figure 8-1 .
Figure 8-1. PEM 0 and PEM 1 Chassis Locations
The DC PEM shown in Figure 8-2 is used in both the E1200 and E1200i DC chassis.
Figure 8-2. E1200i DC PEM
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PRIMARYPRIMARY
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PEM 0 PEM 1
FN00100lp
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FN00101lp