Features 【Efficient Power Supply】This relay module board operates on a reliable DC 12V power supply. 【Precise Control】With standby current as low as 11mA, and individual relay control with up to 222mA, you can easily operate the device and control multiple relays with precision. 6 Commands: "Open", "close", "Mome【Multiple Control Options】This relay module board offers 6 versatile commands including "Open", "Close", "Momentary", "Self-locking", "Interlock" and "Delay" to ensure maximum flexibility. ntary", "Self-locking", "Interlock" and "Delay". 【MODBUS RTU Control】This relay module board is designed to use MODBUS RTU commands, which offer easy control and allow for a maximum delay of 255 seconds. 【Easy Configuration】MODBUS commands can be made using serial HyperTerminal (serial assistant) or "Modbus Poll" for ease of use. Plus, this relay module can support up to 64 devices in parallel for seamless integration with your existing systems. Features:1. Working voltage is  DC 12V.2. Standby current (all relays closed) is 11MA, 1 relay open 40MA, 2 relays 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 to 64 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/7.9oz Typical applications: MODBUS command mode (HEX), you can control a variety of ways: Serial Hyper Terminal Control (need to manually add the CRC), Modbus Poll software control (software automatically add the CRC), PLC or MCU process control. WIring DIagram: 1. DC 12V control circuit,Wiring diagram below. "LOAD" may be camera,LED lights, fans, motors and other DC 12V equipment. 2. DC 1-100V or AC 85-265V control circuit,Wiring diagram below(Note:If not DC 12V load, need another DC 12V power supply). "LOAD" may be LED lights, fans, motors Lights, fluorescent lights, solar water heaters and other DC AC equipment.  Package list:1 * 16 Channel RS485 Relay Package List