The BAST-221C-B2 wired thermostat model is BACnet MS/TP connected utilizing an EIA-485 serial connection. The EIA-485 physical layer can be very effective. It offers the flexibility and convenience of a maximum segment distance of up to 1200 m /4000 ft. allowing for daisy-chaining of equipment on the same bus which makes it the perfect choice when long segments are necessary for the installation. Communicating at lower speeds also gives it the a..
The BAST-221C-BW2 wireless thermostat model is BACnet/IP connected using a wireless connection to a nearby Wi-Fi router/access point which supports IEEE 802.11b/g/n. The respective maximum indoor range is 115 ft. for IEEE 802.11b, 125 ft. for IEEE 802.11g, and 225 ft. for IEEE 802.11n considering there are little to no substantial obstructions between the Wi-Fi router and the thermostats which is the case in most standard buildings. Some buildin..