Redundant low-power distribution in a power distribution network

A distributed communication system (DCS), comprising:

• a power distribution network (PDN), comprising:
• a power source comprising:
• a first power input port configured to receive power;
• a first power output port;
• a first conductor coupling the first power input port to the first power output port;
• a first current sensor associated with the first conductor and configured to measure current on the first conductor;
• a first switch associated with the first conductor;
• and
• a control circuit configured to:
• receive information from the first current sensor;
• and
• open the first switch responsive to the information indicating an overcurrent situation on the first conductor;
• a power conductor pair coupled to the first power output port;
• and
• a plurality of remote subunits, each remote subunit comprising:
• a first remote subunit power input port configured to receive a first power signal from the power source;
• a second remote subunit power input port configured to receive a second power signal from the power source;
• a power combiner connected to the first power input port and the second remote subunit power input port to a primary load and configured to combine the first power signal and the second power signal to a combined power signal;
• and
• a power limiter circuit coupled to the power combiner and limiting the combined power signal to a level below a predefined threshold;
• and
• a central unit configured to:
• distribute received one or more downlink communications signals over one or more downlink communications links to one or more remote subunits;
• and
• distribute received one or more uplink communications signals from the one or more remote subunits from one or more uplink communications links to one or more source communications outputs;
• each remote subunit among the plurality of remote subunits configured to:
• distribute the received one or more downlink communications signals received from the one or more downlink communications links to one or more client devices;
• and
• distribute the received one or more uplink communications signals from the one or more client devices to the one or more uplink communications links.