HAI RC-1000 Serial Wiring
- Thread starter fcwilt
- Start date
BraveSirRobbin
Moderator
Most serial devices use (on a DB-9) pins 2, 3, and 5 (ground). Try this and see if it works, if not reverse pins 2 and 3 on one connector and try again.
Of course the other challenge is to get the baud rate, stop/start bits, parity, etc... correct.
Of course the other challenge is to get the baud rate, stop/start bits, parity, etc... correct.
fcwilt
Active Member
Sorry I wan't clear in my question. I am uncertain about the connections to the 'stat itself. The HAI installation manual shows the wiring for connecting to an HAI controller, with a ground connection, a zone input connection and a output connection. However looking at the lines shown for input and output with my scope I don't see anything that looks like RS-232 levels. This is with nothing connected to these lines.
I have a wiring diagram for the older OmniStat "ones" but don't know if it applies. That diagram shows four wires. The OmniStat "two" has four connections inside, with the same color codes, but two of the connections are jumpered, so that is a bit confusing.
I just don't wont to fry the unit by incorrectly wiring it.
Thanks for the feedback.
commexperts
New Member
Has any connected the OmniStat 2 to the ELK M1G? Like Fred said three of the wires have the same color codes as the OmniStat 1,(Yellow, Black and Green) but nothing for the red wire. There is a fourth terminal but it is jumpered to the Black wire and marked N/C (which usally means no connection). I did wire up the three colors as you would on the older OmniStat 1's but the ELK M1G is not communicating with it.
Any Ideas?
CommExperts
Any Ideas?
CommExperts
fredric_richmond
New Member
Has anyone gotten an M1G to recognize a RC-1000 or RC-2000? I have tried every possible permutation of connection and configuration I can think of. No joy.
Thanks,
(another) Fred
Thanks,
(another) Fred
Let me check something: are you plugging the HAI serial connections into the M1G or into an M1XSP? My understanding (perhaps incorrect) is that you need specific firmware and settings on the serial port to ensure the connection works. I don't know if the correct firmware for thermostats is installed (or installable) on the onboard M1G serial port.
I am planning to network some HAI RCS-1000 thermostats also, but I'm ordering an M1XSP to connect them to the M1G (the on-board serial port will drive the M1XEP anyway). The wiring diagram I'm intending to use is at http://www.elkproducts.com/pdf/M1XSP_Light...al_Port_Exp.pdf, page 8. Can anyone confirm that this will work?
Chris D.
I am planning to network some HAI RCS-1000 thermostats also, but I'm ordering an M1XSP to connect them to the M1G (the on-board serial port will drive the M1XEP anyway). The wiring diagram I'm intending to use is at http://www.elkproducts.com/pdf/M1XSP_Light...al_Port_Exp.pdf, page 8. Can anyone confirm that this will work?
Chris D.
The RC1000 and RC2000 series are fully backwards compatible with the older HAI RC series thermostats. If the older thermostats work in the system there should be no reason why the newer thermostats should not. Remember when you are plugging in the RS232 to the OMNISTAT2, you are connecting the red wire to the position where it is labeled "black". Follow the diagram posted above in my attachment and you should not have problems. If you fear you may have changed a critical setting on the Omnistat2 you may run a factory rest (last option under installation options).
Good, then the wiring diagram for the RC-80/RC-112/RC-122 will work. Thanks.
fredric_richmond
New Member
What Rytree1 is saying is true, it should work. However, to my knowledge no one has been successful. And yes, we are going through the M1XSP. The M1's serial port is not designed for thermostats. If someone has gotten the RC-1000 / RC-2000 to work with the M1G (through the M1XSP), please chime in and tell us how you did it.
Fred
I do not have an ELK so I have not tried to connect it to the M1XSP, but I have connected several RC1000 and RC2000 to the RS232 port on several computers. I can confirm that the Omnistat2 works with RS232 and the M1XSP I believe is using a RS232 port to connect to the thermostats. I have also tested several older programs written to communicate to the old RC80 series thermostats via RS232 and they work fine with the Omnistat2.
commexperts
New Member
Yes, I finally got mine to work fine, just had to wire the ELK serial cable as follows:
Elk Serial cable to RC-1000
Black wire to N/C terminal (remove jumper)
Red wire to Black terminal
Green wire to Green terminal
White wire to Yellow terminal
Which was different from my older OmniStat 1 (RC-80)
CommExperts
Thanks everyone for posting this information. I still couldn't get it to work and started a thread at ELK's forums and was told that you also have to clear the "Comm Jumper" or you could only send and not receive data.
