Features:1. Working voltage is DC 12V.2. Standby current (all relays closed) is 11MA, 1 relay open 40MA, 2relays open 67MA, 3 relays open 95MA, 4 relays open 121MA, 5 relays open 147MA,6 relays open 173MA, 7 relays open 198MA, 8 relays open 222MA...3. 6 Commands: "Open", "close","Momentary", "Self-locking", "Interlock" and "Delay".4. MODBUS RTU command control mode, the maximum delay is 255 seconds.5. MODBUS commands can be made serial HyperTerminal (serial assistant) or"Modbus Poll" enter.6. Under the MODBUS command mode, this relay module can support up to64 devices in parallel.Specification:Working Voltage:DC 12VStandby Current:11MAMax Load:10A/250VAC, 10A/125VAC, 10A/30VDC, 10A/28VDC, 10A/12VDCSize:Approx. 17*6.5*2cm / 6.7*2.5*0.8inWeight:Approx. 224g/7.9ozTypical applications:MODBUScommand mode (HEX), you can control a variety of ways:Serial Hyper Terminal Control (need to manually add the CRC), Modbus Pollsoftware control (software automatically add the CRC), PLC or MCU processcontrol.WIring DIagram: 1. DC12V control circuit,Wiring diagram below. "LOAD" may be camera,LEDlights, fans, motors and other DC 12V equipment.2. DC 1-100V or AC 85-265V control circuit,Wiring diagram below(Note:If not DC 12Vload, need another DC 12V power supply). "LOAD" may be LED lights,fans, motors Lights, fluorescent lights, solar water heaters and other DC ACequipment.Package list:1 * 16Channel RS485 Relay