I am working on developing a system including a RS485 network. All microcontroller-based devices will be powered by a 24VDC lead acid battery system. Each system will contain a RS485 driver powered by an a 5V DC-DC buck converter. The device in question will be added to the end of a network, so the termination resistor will be built in.
I would like to power(battery supply and ground) and communicate(RS485 A and B) using the same harness and connector(4 conductor).
My question are:
1) Is a two-pair RS-485 cable harness sufficient for this application? Two conductors would be 485 twisted pair and the other two would be supply and ground. The conductors would be 22AWG. Max current would be 1.5A. Nominal current is about 50 mA.
2) Would the RS-485 twisted pair have to be separately shielded from the conductors supplying the power?
Thank you all for taking the time to read this post.
I would like to power(battery supply and ground) and communicate(RS485 A and B) using the same harness and connector(4 conductor).
My question are:
1) Is a two-pair RS-485 cable harness sufficient for this application? Two conductors would be 485 twisted pair and the other two would be supply and ground. The conductors would be 22AWG. Max current would be 1.5A. Nominal current is about 50 mA.
2) Would the RS-485 twisted pair have to be separately shielded from the conductors supplying the power?
Thank you all for taking the time to read this post.