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View Full Version : 485 MUX for LOR


AI
08-05-2007, 01:16 PM
I know it will not work for protocol like RENARD be case thay have to be inline in order but do you think a MUX would be compatible with the LOR protocol. I picked up an alarm system 4 channel MUX used to conect 4 singel ended devises on a 485 net work. I think it would greatly simplify my layout if it would work. I my have to ask KC but thought I would run it by you guys first. AI
A Marchini
08-06-2007, 09:13 PM
I know it will not work for protocol like RENARD be case thay have to be inline in order but do you think a MUX would be compatible with the LOR protocol. I picked up an alarm system 4 channel MUX used to conect 4 singel ended devises on a 485 net work. I think it would greatly simplify my layout if it would work. I my have to ask KC but thought I would run it by you guys first. AI
As long as it is capable of keeping up with the changing signaling direction, it should work.
Do you have a part number for the device? Is the intention to run from the computer to it, then out to 4 individual LOR boards? Is there a dedicated input port?

Tony
AI
08-07-2007, 05:26 AM
Tony; Thaqnks for getting back to me. The MUX is part of the SCRAMBLE*NET line by Hirsch Electronics. Listed as NET*MUX4. One input from PC to for RS-485 outputs. The speed spec. for thare SCRAMBLE*NET
devices is listed as 9600 baud but may be higher. It uses the same line driver chips as the Renard boards and is coupled with 6N136 optos. You can find more info at www.hirscheletronics.com AI
A Marchini
08-07-2007, 11:52 PM
Tony; Thaqnks for getting back to me. The MUX is part of the SCRAMBLE*NET line by Hirsch Electronics. Listed as NET*MUX4. One input from PC to for RS-485 outputs. The speed spec. for thare SCRAMBLE*NET
devices is listed as 9600 baud but may be higher. It uses the same line driver chips as the Renard boards and is coupled with 6N136 optos. You can find more info at www.hirscheletronics.com AI

If the design is timed around 9600 baud, it may not react quick enough to higher speeds. I am not too sure what LOR is running at, but if there is an expectation for the transmit drivers to be reversed, ready to receive, in a short time interval, then this device may not work...
Of course, ultimately, trying will tell.

Having opto-isolated trunks is nice.
Tony