One of the mantras here at S4 is “investigate before you integrate” and there are a few products we recommend to our customers in order to make it easy for them to take our advice. One of those products is the S2USB485 from S Squared Innovations. This handy device is a single USB serial port with RS485 and RS232 interfaces on it.
S Squared Innovations also provides free N2 bus diagnostic software. This allows you to investigate the health of your N2 bus, checking the voltages to make sure they are in the correct range, checking if there is an appropriate COM port configured for the use of HVAC Pro, and it checks if there is a supervisor present on the bus, which could cause problems using HVAC Pro software.
This is a simple and inexpensive tool that can save you a lot of time and headaches when you are integrating a legacy installation.
To order one of your own, please contact Stephanie@thes4group.com