129Views7Replies
Help with understanding pinout on circuit board
I'm an HVAC technician and at school they had a bunch of Carrier EMI thermostats that connect to a router with a module. I'm pretty tech-savvy, but I'm not the greatest when it comes to wireless technology. On the board there are spots labeled: Tx, Rx, A2D2, GNDs, GNDp, and 12vdc. Then there are another 2 labeled OAT and OATC. What do these all mean? All I know is that Tx and Rx are transmitting and receiving. Any help is much appreciated.
Comments
7 years ago
I think oat and oat stand for outdoor ambient temperature (maybe thermometer), and outdoor ambient temperature control
Reply 7 years ago
*oat and oatc
7 years ago
GND and 12 volt is ground and 12 volts source. GNDp is PLL ground signal line and i guess GNDs is just common ground.
Reply 7 years ago
Makes sense to me, I never heard of PLL before
7 years ago
I just came across a page that's saying the thermostat connects to the internet via a 2-way paging module.
7 years ago
Got a reference to the installation manual ?
Reply 7 years ago
Unfortunately no, all I have is the module and the thermostat. I even called carrier and they wouldn't help me out.