All Questions
37
questions
1
vote
1
answer
197
views
RS485 over CAN: when and why?
I'm designing my own home automation gateway and I've already added a rs485 transceiver, everything is fine, but I'm thinking about adding also a CAN bus transceiver because I've seen that it's often ...
- 579
0
votes
1
answer
297
views
Printed circuit board connector identification
I have a PCB with some connectors and wanted to identify which type there are of.
How do the experts approach the problem, to identify the type?
For example, the picture below shows a connector, ...
- 103
2
votes
1
answer
947
views
Using CANbus cable for RS-485
I have a question regarding an application with a Modbus RTU network.
I would like to know if it's possible to use a CANbus cable instead of an RS-485 cable? Here is a picture of the cable:
- 23
3
votes
1
answer
230
views
Is it possibile to use a CAN transceiver to send RS485 data?
Looking at the signal ranges I'm not sure if I can use a CAN transceiver (not controller!) to send data to a single RS485 device.
- 1,235
0
votes
2
answers
87
views
How to connect a few shields correctly?
There are several shields on my PCB: shield on CAN-bus, on RS485, on Ethernet, on ENCODER motor signals.
How do I correctly connect all these shields? If I use the star topology, which filters should ...
2
votes
1
answer
4k
views
Can RS485 be considered a multi-master bus?
There are some electrical specifications specifically designed for multi-master protocols such as CAN, I2C, 1-Wire, etc. which are classified under CSMA/CD networks.
However, RS485 has a push pull ...
- 1,426
0
votes
2
answers
146
views
Medium Range Two Wire Bus Recommendations?
Do you have any recommendations for a medium range (~10 meters) two-wire bus?
My supply voltage is 24V and I'll have a single master with ~50 slaves connected to it.
I've looked into:
I2C - Great but ...
- 1
2
votes
2
answers
133
views
How to select the most appropriate (serial) bus for controller?
In the context of a robotic project where different 'payloads' and/or robotics arms (end-deflector) should be mated mechanically with power, data and control connections support, I would like to ...
- 21
1
vote
2
answers
1k
views
Where to use CAN v RS485
Not sure whether this is too broad a question but...
Why would one choose CAN Bus over RS485, or vice versa, as a system interconnect?
I have a MCU SBC with multiple interfaces including the two ...
- 14k
2
votes
1
answer
237
views
RS-485 + iCE40 for better CAN-FD
This is an idea I have been toying with for a while and wanted to get an opinion. When I first heard about CAN-FD I thought it was going to be the answer to this problem. However most mid range ...
- 91
3
votes
4
answers
4k
views
Communication between BMS and PC via CAN/RS485 — where to start?
I am about to obtain BYD B-Box LV Residential battery for my off-grid solar system. The inverter I have is not on the list of compatible ones, which means (according to my local battery supplier) that ...
- 445
1
vote
1
answer
991
views
Identify Single wire communications protocol [closed]
Hi guys
I I have uploaded pictures from an oscilloscope.
This is the signal that an indoor AC unit sends to the outdoor unit. It uses a single wire for communication and Seeing the PCB it looks like ...
- 11
3
votes
2
answers
181
views
What serial communication interface would work best for data logging when the nearest sensor and main MCU are (at least) 1 meter apart?
I would like to setup a "sensor array" which has 4 sensors attached to it. Each sensor is expected to send data at rates of up to 8 Hz. The data would be shipped off to an MCU that is around 1-2 ...
0
votes
2
answers
10k
views
Which RJ45 pins should I use for power supply?
I'm somewhere in a process of creating mini automation system for hobby use.
I've already put CAT 5e cables with RJ-45 connectors in walls. They are somewhere between 5 - 30 meters long.
On one side ...
- 395
15
votes
2
answers
25k
views
Significant differences between CAN and RS485 regarding the physical layer
In comparing the physical layer of CAN and RS485, I am trying to find the advantages of either one over the other. I found out that they are quite similar. Both are good in terms of common mode ...
- 696