1. Operating Voltage: DC 8-25V (DC 9V, 12V, 15V, 24V) 2. Operating Current: 10-14MA 3. MODBUS RTU supports function codes 03 and 06. 4. V1(CH1) channel voltage measurement range is 0-5V, V2(CH2) channel voltage measurement range is 0-10V, C1/C2(CH3/4) channel current measurement range is 0-20MA/4-20MA. 5. Voltage resolution is 0.01V with 1% measurement accuracy; current resolution is 0.1MA with 1% measurement accuracy. Calibration is possible if the error exceeds 1%. 6. MODBUS commands can be sent serially via HyperTerminal (serial assistant) or PLC. 7. Under MODBUS mode, it can support up to 247 devices in parallel. 8. Size: 45 x 30 x 15mm 9. Weight: 11g Application: 4-20MA/0-20MA Sensor Voltage/Current Analog Acquisition Automated Industrial PLC, Home Automation Identification Systems RS485 Remote Monitoring Multimeter Voltmeter Electronic Measuring Instruments Color: White Material: PCB Board + Electronic Accessories Package Contents: 1 x N4AIA04 4 Channel Voltage/Current Analog Acquisition RS485 Module Only the above package content is included; other products are not. Note: Light and different displays may cause the color of the item in the picture to differ slightly from the real item. The allowed measurement error is +/- 1-3 cm.