Working voltage: DC 8-25V(Recommend DC 12V); Working current: 8-13MAMODBUS RTU protocol, 03 read , 06 write .Serial port baud rate: 9600 (default), N, 8, 1By modifying the 485 address, up to 247 modules can be cascaded (more than 16 please use R485 repeater); Can read temperature and PT100 resistance valueAdapted sensor: PT100 3-wire or 2-wire sensorTemperature measurement range: B version -20 to +220. It is recommended to select a version with a smaller range within the range that meets the measurement.Temperature measurement accuracy: 1% , if the temperature deviation is too , please recalibrate.Size: 60 X 30 X 16MMWeight: 16gType:Logic ICsModel Number:PTA9B01Dissipation :-0.2Wcolor:GreenMaterial:Circuit board + electronic accessoriesPackage Contents:1 x PTA9B01 PT100 RS485 Acquisition moduleOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.