JCI Direct

[scepter]

We recently picked up a couple of building with JCI NCMs and UNTs and VAVs.
I picked up a copy of M-Tools and have tried to connect to building a couple of ways.
First I tried to go through the NCM using hyper terminal and both a null modem cable and a normal 9 to 9 cable. No luck. My reading tells me that the NCM had to be setup in a particular way for that to work. I then read how HVAC-Pro can connect using a RS-232 to RS-485 converter. I have a 485CARLP9A that I use with Carriers stuff. I found the data sheet for this and made up a cable for +, - and ref. I connected to the N2 bus at the NCM. In HVAC Pro there is Controller Information tab that brought me through to scan all addresses for devices. I never picked up a single control. I changed baud rate, XON-XOFF to Hardware and back again. I used the CCN driver for the converter and used the default standard windows driver. Nothing!
Any suggestions?
Thanks
scepter

[simsd]

Yes,

You need to either buy the CVT-PRO kit which has the correct converters and patch cables or buy this special one that a guy from China sells on Ebay for about $ 100.00.

[okemechtech]

I'ved used a B&B 485CARL which works to access the N2 bus. You must have something set incorrectly or wired incorrectly. OK

[scepter]

OK,
Can you tell me your pin configuration and describe how you are connecting?
What comm port driver are you using?
Thanks
scepter

[okemechtech]

I have the B&B converter #485CARLP9A in my laptop with 9 pin serial port (com 1). I took a 6 pin phone wall jack and connected three wires to Com to red, N2- to yellow and N2+ to black. Connect a standard phone cord between the B&B 485CARL9A and the wall jack with the three wires connected to the JCI N2 plug from a controller. Use HVACpro search for devices via N2 bus. Nothing to complicated OK;)

[scepter]

Thanks OK,

That is pretty much what I did. I need to double check my wiring just to be sure.

scepter