1. Operating Voltage : DC 12 (DC 12-25V), recommended power supply with small ripple. Operating Current : 12-13MA 2. MODBUS RTU Command support 03 06 function code. CH1(O1) output voltage is 0-5V, maximum output current is 20MA. 1-5V accuracy 1%, Less than 1V there is a ripple of 50HZ/40MV. 3. CH2(O2) output voltage is 0-10V, maximum output current is 20MA. 2-10V accuracy 1%, Less than 2V there is a ripple of 50HZ/80MV. 4. The voltage resolution is 0.01V, the output accuracy is 1%; if the error is greater than 1%, it can be calibrated 5. MODBUS commands can be made serial HyperTerminal (serial assistant) OR PLC Enter;Under the MODBUS command mode, it can support up to 247 devices in parallel. size:45 x 35 x 15mm Material:abs colour:green Package Contents: 4 x N4DAC02 12-25V 2 Channel PWM DAC RS485 Module