HVAC switchable communication bus and power bus control board systems and methods
The present disclosure includes a control board including a switchable input/output port. The switchable I/O port may provide a switchable communication bus capable of selectively supporting one of multiple different communication protocols and may provide a switchable power bus capable of selectively conducting electrical power from one of multiple different power supplies. As such, the control board may communicatively and/or electrically couple to a wide range of devices. To that end, the control board may support the dynamic interchange and reconfiguration of devices coupled to the control board, allowing a control system including the control board greater operational flexibility.
1. A control board of a heating, ventilation, and air conditioning (HVAC) system, comprising:
a microcontroller programmed to control operation of equipment in the HVAC system; and
a switchable input/output (I/O) port communicatively coupled to the microcontroller via a switchable communication bus, wherein, when the equipment is coupled to the switchable I/O port, the microcontroller is programmed to:
determine a target communication protocol used by the equipment;
when the target communication protocol is a first communication protocol, communicatively couple the switchable communication bus and a first communication bus of the control board; and
when the target communication protocol is a second communication protocol, different from the first communication protocol, communicatively couple the switchable communication bus and a second communication bus of the control board.
2. The control board of claim 1 , comprising a switching device electrically coupled to a first power bus of the control board and electrically coupled to a second power bus of the control board, wherein the switching device is electrically coupled to the switchable I/O port via a switchable power bus.
3. The control board of claim 2 , wherein the microcontroller is programmed to, when the target communication protocol is the first communication protocol, instruct the switching device to electrically couple the switchable power bus and the first power bus.
4. The control board of claim 3 , wherein the microcontroller is programmed to, when the target communication protocol is the second communication protocol, instruct the switching device to electrically couple the switchable power bus and the second power bus.
5. The control board of claim 4 , wherein the first power bus is electrically coupled to a first power source configured to output electrical power with first power parameters, and the second power bus is electrically coupled to a second power source configured to output electrical power with second power parameters, wherein the first power source and the second power source are different, and the first power parameters and the second power parameters are different.
6. The control board of claim 2 , comprising:
a first I/O port communicatively coupled to the microcontroller via the first communication bus, wherein the microcontroller is programmed to communicate on the first communication bus using the first communication protocol; and
a second I/O port communicatively coupled to the microcontroller via the second communication bus, wherein the microcontroller is programmed to communicate on the second communication bus using the second communication protocol.
7. The control board of claim 6 , wherein the switching device is electrically coupled to the first I/O port via the first power bus and electrically coupled to the second I/O port via the second power bus.
8. The control board of claim 1 , wherein the microcontroller is configured to determine the target communication protocol based on an input received via an interface device of the HVAC system.
9. The control board of claim 8 , wherein the input comprises an identity of the equipment, a type of the equipment, a manufacturer of the equipment, the target communication protocol used by the equipment, or any combination thereof.
10. The control board of claim 1 , wherein the control board comprises a memory storing information related to a most recently implemented communication protocol, and the microcontroller is configured to determine the target communication protocol based at least in part on the information related to the most recently implemented communication protocol.
11. A control board of a heating, ventilation, and air conditioning (HVAC) system, comprising:
a microcontroller programmed to control operation of equipment in the HVAC system;
a switchable input/output (I/O) port configured to couple to the equipment; and
a switching device electrically coupled to a first power bus of the control board and electrically coupled to a second power bus of the control board, wherein the switching device is electrically coupled to the switchable I/O port via a switchable power bus,
wherein, when the equipment is coupled to the switchable I/O port, the microcontroller is programmed to:
determine a target communication protocol used by the equipment; and
when the target communication protocol is a first communication protocol, instruct the switching device to electrically couple the switchable power bus and the first power bus and electrically isolate the switchable power bus from the second power bus.
12. The control board of claim 11 , wherein the microcontroller is programmed to, when the equipment is coupled to the switchable I/O port, instruct the switching device to electrically couple the switchable power bus and the second power bus and electrically isolate the switchable power bus from the first power bus when the target communication protocol is a second communication protocol different from the first communication protocol.
13. The control board of claim 11 , wherein the first power bus is electrically coupled to a first power source, and the second power bus is electrically coupled to a second power source, wherein the first power source and the second power source are different.
14. The control board of claim 11 , wherein the switchable I/O port is communicatively coupled to the microcontroller via a switchable communication bus, and wherein the microcontroller is programmed to:
when the target communication protocol is the first communication protocol, communicatively couple the switchable communication bus and a first communication bus of the control board; and
when the target communication protocol is not the first communication protocol, communicatively couple the switchable communication bus and a second communication bus of the control board.
15. The control board of claim 14 , wherein the microcontroller is programmed to determine the target communication protocol based on an operational status of the control board.
16. The control board of claim 15 , wherein the operational status comprises a master operational status indicative of the control board being a master control board or a subordinate operational status indicative of the control board being a subordinate control board.
17. A tangible, non-transitory, computer-readable medium, comprising instructions executable by at least one processor of a control system that, when executed by the at least one processor, cause the at least one processor to:
determine a target communication protocol used by equipment coupled to a switchable input/output (I/O) port on a control board of the control system;
communicatively couple a switchable communication bus of the control board and a first communication bus of the control board and instruct a switching device of the control board to electrically couple a switchable power bus of the control board and a first power bus of the control board when the target communication protocol is a first communication protocol; and
communicatively couple the switchable communication bus and a second communication bus of the control board and instruct the switching device to electrically couple the switchable power bus and a second power bus of the control board when the target communication protocol is a second communication protocol different from the first communication protocol.
18. The computer-readable medium of claim 17 , wherein the instructions, when executed by the at least one processor, cause the at least one processor to:
determine an operational status of the control board;
determine that the target communication protocol is the first communication protocol when the operational status indicates that the control board is a master control board; and
determine that the target communication protocol is the second communication protocol when the operational status indicates that the control board is a subordinate control board.
19. The computer-readable medium of claim 17 , wherein the instructions, when executed by the at least one processor, cause the at least one processor to:
receive, via a user interface of the control system, an input related to the equipment, wherein the input comprises an identity of the equipment, a type of the equipment, a manufacturer of the equipment, the target communication protocol used by the equipment, or any combination thereof; and
determine the target communication protocol based at least in part on the input.
20. The computer-readable medium of claim 17 , wherein the instructions, when executed by the at least one processor, cause the at least one processor to:
update a first mapping of addresses of first communication protocol connections to include connections of the switchable I/O port when the target communication protocol is the first communication protocol; and
update a second mapping of addresses of second communication protocol connections to include the connections of the switchable I/O port when the target communication protocol is the second communication protocol.