CCN bus conversion help

[kevin stone]

We have a job that has a 3 wire CCN bus we are removing all the ccn controllers and installing a johnson we can convert the bus to either N2 or MSTP does anybody have any experience good or bad doing this?
thanks
Kevin

[contrltech]

It depends on the condition of the wiring. N2 runs at a lower baud rate than the average MS/TP network. If all the wiring is in good shape and the physical network configuration is ok (no T taps, etc...) then I'd go with MS/TP - you'll have more options available down the road if you want to add third party controllers to the network.

[kevin stone]

Thanks for the feedback
So you think MSTP is more finicky than N2?
thanks
Kevin

[contrltech]

Thanks for the feedback
So you think MSTP is more finicky than N2?
thanks
Kevin

Yes, because it operates at higher speeds it's more prone to
"issues" on a maginal network. N2 runs at 9600 whereas MS/TP
goes all the way up to 156k, although it is usually set around 38 to 56k.
Having said that, I have yet to have any problems retrofiting buildings
with JCI MS/TP controllers.

[kevin stone]

Thanks

[gbfromsd]

ideally, you want 22 gage for the mstp bus. limitations in length and baud rate apply for substitutions. if your bus is short, then no problem.