DC Power Entry Modules (PEMs)

The 61000 Security System DC configuration includes two Power Entry Modules (PEMs), each with a rating of -48/-60VDC 125A. The PEMs supply DC power, EMC filtering and over-current protection for the Chassis. Each PEM can supply 100% of Chassis power.

On each PEM there are 5 power segments (5 circuit breakers on the DC PEM), for a total power of 10KW. Both DC PEMs provide power redundancy, a total of 10KW.

If the DC voltages of the 2 PEMs are the same, for example, they are both -47.8, the two PEMs share the load. If one of the DC voltages is higher than the other by ~0.5V or more, the PEM will carry the entire load and the other PEM will be standby.

The DC configuration does not have its own power source. For each PEM, you must supply:

• A DC power source that includes an external battery and a branch circuit breaker of 125A.
• Lugs (Panduit LCD6-14A-L), to connect the wires to the terminal blocks of the PEMs.

The PEM is a customer replaceable unit. The two-PEM configuration provides full redundancy. The PEMs are located in the bottom-rear of the Chassis.

Related Topics PEM Panel and LED Indicators