Termination for wire pair carrying DC and differential signals

A power and communication system, for use with a DC power supply having a positive voltage terminal and a negative voltage terminal, the system for providing differential data and DC power on a wire pair comprising:

• an isolation transformer having a primary winding, a first secondary winding, and a second secondary winding, wherein a first end of the first secondary winding is configured to be coupled to the positive voltage terminal of the power supply, and wherein a first end of the second secondary winding is configured to be coupled to the negative voltage terminal of the power supply, wherein the first end of the first secondary winding and the first end of the second secondary winding form a split center tap of a secondary side of the transformer;
• a transceiver coupled across the primary winding for transmitting and receiving differential data signals via the transformer and the wire pair;
• and
• wherein a second end of the first secondary winding is configured to be coupled to a first wire of the wire pair, and a second end of the second secondary winding is configured to be coupled to a second wire of the wire pair, such that the first secondary winding and the second secondary winding conduct DC power to the wire pair and also conduct differential data signals when coupled to the DC power supply.