Power supply delivery system for splitting and combining power
A power supply delivery system is provided. The power supply delivery system includes a source module and a load module. The source module includes an input coupled to a Class 1 power source, plural outputs coupled to plural Class 2 cables, and circuitry coupled to the input and the plural outputs. The circuitry splits power received via the input into a plural Class 2 channels and conducts the plural Class 2 channels to the plurality of outputs. The load module includes plural inputs coupled to the plural Class 2 cables, an output coupled to a Class 1 load, and circuitry coupled to the plural inputs and the output. The circuitry combines the plurality of Class 2 channels received via the plural inputs into a single Class 1 channel and conducts the single Class 1 channel to the output.
1. A power supply delivery system comprising:
a source end module including
a source input connector configured to be electrically connected to an external power source;
a plurality of source output connectors configured to be electrically connected to the source input connector; and
first circuitry configured to be electrically connected to the source input connector and to each of the plurality of source output connectors, the first circuitry configured to
split power received via the source input connector into a plurality of power channels; and
conduct the split power along each of the plurality of power channels to the plurality of source output connectors; and
a load end module including:
a plurality of load input connectors configured to be electrically connected to the plurality of source output connectors;
a load output connector configured to be electrically connected to a load; and
second circuitry configured to be electrically connected to each of the plurality of load input connectors and to the load output connector, the second circuitry being configured to
combine the split power received via the plurality of load input connectors into a single power channel; and
conduct the combined power along the single power channel to the load output connector.
2. The power supply delivery system of claim 1 , wherein the external power source includes a National Electrical Code 2017 (NEC) Class 1 power source, and wherein the load includes an NEC Class 1 load.
3. The power supply delivery system of claim 1 , wherein the plurality of power channels and the single power channel includes a plurality of discrete NEC Class 2 or Class 3 rated cables.
4. The power supply delivery system of claim 1 , wherein the plurality of power channels includes a plurality of twisted pair data cables.
5. The power supply delivery system of claim 1 , wherein the source end module includes a current monitor in series with at least one of the plurality of power channels;
a comparator circuit connected to at least one of the plurality of power channels;
a relay in series with at least one of the plurality of power channels;
a microcontroller connected to the relay;
a fault state current measurement circuit connected to at least one of the plurality of power channels; and
one or more fuses in series with at least one of the plurality of power channels.
6. The power supply delivery system of claim 5 , wherein the current monitor, the comparator circuit, and the relay are configured to monitor a current flowing within at least one of the plurality of power channels and to open the relay when an overcurrent condition is detected.
7. The power supply delivery system of claim 5 , wherein an output of the current monitor feeds into an input of the comparator circuit, and wherein an output of the comparator circuit drives the relay based on the output of the current monitor and a reference current.
8. The power supply delivery system of claim 1 , wherein the load end module includes a diode in series with the single power channel.
9. The power supply delivery system of claim 1 , wherein the load is a surgical display.
10. A method of delivering power to a load, the method comprising:
receiving power from an external power source via a source input connector electrically connected to the external power source;
splitting the power received via the source input connector into a plurality of power channels using first circuitry electrically connected to the source input connector;
conducting the split power along each of the plurality of power channels to a plurality of source output connectors electrically connected to the source input connector using the first circuitry;
combining the split power received via a plurality of load input connectors electrically connected to the plurality of source output connectors into a single power channel using second circuitry electrically connected to each of the plurality of load input connectors and to a load output connector electrically connected to the load; and
conducting the combined power along the single power channel to the load output connector, thereby delivering the power to the load.
11. The method of claim 10 , wherein the external power source includes a National Electrical Code 2017 (NEC) Class 1 power source, and wherein the load includes an NEC Class 1 load.
12. The method of claim 10 , wherein the plurality of power channels and the single power channel includes a plurality of discrete NEC Class 2 or Class 3 rated cables and/or a plurality of twisted pair data cables.
13. The method of claim 10 , further comprising monitoring a current flowing within at least one of the plurality of power channels using:
a current monitor in series with at least one of the plurality of power channels;
a comparator circuit connected to at least one of the plurality of power channels; and
a relay in series with at least one of the plurality of power channels.
14. The method of claim 13 , further comprising opening the relay when an overcurrent condition is detected based on the monitored current.
15. The method of claim 14 , further comprising asserting an alarm annunciation when an overcurrent condition is detected based on at least one of:
a combined return current from all of the plurality of power channels, and
a difference between a combined current in each of the plurality of power channels and a combined return current from all of the plurality of power channels.
16. The method of claim 14 , wherein an output of the current monitor feeds into an input of the comparator circuit, and wherein an output of the comparator circuit drives the relay based on the output of the current monitor and a reference current.