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1
just use two pgms, have 8 zones follow one and 7 zones follow the other
2
You mean as an alarm company?  Not really.  Brinks doesn't seem to be too common around here.  It's not too often that I see their stickers and signs.  Plenty of ADT though, we take ADT's Vista panels over weekly.  Not to mention, a takeover of a Brinks is almost guaranteed to be a default of the panel since the installer code wouldn't be known. 
3
I have the BHS programmer, and a 4000 panel in with the 16-zone expander and wireless receiver.   I enrolled my existing 5800 wireless devices right in with no trouble, it all works great.

It's a solid, robust alarm system.  It's a shame it's made by Honeywell and not used for any other dealer than Brinks.  I would have liked to see many of the capabilities of the Brinks systems in Honeywell's vista systems.

Contrary to what was mentioned in earlier years on this forum, the Brinks panels can report to a central station in industry standard SIA format.  I have mine transmitting to a test account at our central station via a Telguard TG1 Express cellular communicator.  Works flawlessly.

Yeah I know. It's really quite an elaborate system. All the programming is real modular, very well designed. Do you officially advertise that the Brinks system is supported, even if it's hard to program? If not, you should, especially since it's a lot more accessible now.
4
Sadly the NX-584 is not sold on the Australian market.

I contacted a number of companies about having one shipped here, most of them wanted US$60+ just in shipping fees. Several ignored me, and the couple that were willing to ship here seem to have bad reviews.
5
That's why the NX-584 RS232 gateway is for. It's not that expensive.

Usually alarm panels use a synchronous serial communication with their keypads and modules with 2 wires : Data and Clock. NX bus uses 1 wire, Data only which is asynchronous. Power plus and Common are always there so were talking about a 4 wire or a 3 wire security system bus.

george
6
I have the BHS programmer, and a 4000 panel in with the 16-zone expander and wireless receiver.   I enrolled my existing 5800 wireless devices right in with no trouble, it all works great.

It's a solid, robust alarm system.  It's a shame it's made by Honeywell and not used for any other dealer than Brinks.  I would have liked to see many of the capabilities of the Brinks systems in Honeywell's vista systems.

Contrary to what was mentioned in earlier years on this forum, the Brinks panels can report to a central station in industry standard SIA format.  I have mine transmitting to a test account at our central station via a Telguard TG1 Express cellular communicator.  Works flawlessly.
7
Oh - I thought it may be using the COM wire as the second wire.

The reason I would like to do this is because there are many users who have a NX4/8 panels with no serial port. If they are based in Australia it costs $200+ to order a NX-588e or ComNav, and the NX-584 is for all intents and purposes near impossible to buy here.

If I can find a (relatively) simple way to interact with an NX panel via the bus, then I could write a small home automation interface based on that. This would be helpful for a lot of DIYers.
8
Hi Danny,
the NX bus is a 1 -wire bus (not to be confused with the Dallas bus). It's 9-bit -like RS485 can be- and is panel initiated. The panel addresses nodes on the bus then keeps time slots gets messages. Simple RS-485 on a differential physical layer (like DMX or modbus ) can not be implemented.

I am wondering why would you need such a thing? To my knowledge you have an NX-8E which you managed to connect to through it's embedded serial port. With this serial port you can do tons of things of home automation . I really do not understand...

george
9
Given that the keypad/panel bus on the NX line uses 2 wire serial, is it possible to communicate with the bus using a USB Rs-485 serial adapter?
10
Yep. It's a little buggy, and it's not entirely finished yet, but it works. Now you can reprogram that old Brinks panel you have lying around without having to track down one of the programming devices. The only special hardware you need is a USB to RS-485 adapter, which is easy to find for less than $10. (This is the one I use.)

https://www.youtube.com/watch?v=2FHvPhKlM58 (most of the visual errors shown in this video have been fixed)
https://www.github.com/flarn2006/BHSTools

Here's the basics of how to use it:

1. Hook up the RS-485 adapter to your panel's data bus. Connect the "A" terminal to "DATA", and the "B" terminal to "CLK". If there's a ground terminal, connect that to any of the "-" terminals on the panel. (Yes, it's really RS-485; the labels on the terminals are misleading.)

2. Make sure you have Python 3 installed, as well as the pyserial, crcmod, and Flask libraries.

3. Download the zip file from Github and extract it somewhere. Run the "s3121.py" script, giving the name of the serial port assigned to the RS-485 adapter as a command line parameter. On Linux this will probably begin with "/dev/ttyUSB" or "/dev/ttyACM", and on Windows (untested) it will be something like "COM3".

4. Ignore the text that fills the terminal/command prompt window. Open a web browser, and navigate to http://127.0.0.1:3121/.

5. You should see an "ENTER INSTALLER ACCESS CODE >" prompt. As far as I can tell you won't get locked out or anything for guessing it wrong too many times, so don't worry. Try the default of 012345 first; if that doesn't work then try parts of the account number from when it was last monitored, if you still remember that. Check to see if it's written down anywhere inside the panel. Worst case scenario, if you can't guess the code, you'll still be able to get in, but you'll need to clear the programming and reprogram it from scratch. See my video here.

6. Program the system.

Tip: Since this is accessed through a Web browser, you can keep a Raspberry Pi or something hooked up to the panel, and connect to it whenever you need to access the programming. Just make sure the installer code isn't easy to guess--if it is, you can change it by changing the Comm 1 account number for account 1; it's the same number.
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