Feature: 1. The default baud rate is 9600BPS, and the baud rate 2400 4800 19200 BPS can be selected through jumpers. 2. In command mode, the relay board can up to 64 devices can be used in parallel. 3. In addition to the serial port hyper terminal input, the command can also be input by other. 4. This relay module has a professional structure, long service life and simple operation. 5. Strong anti-interference performance, low working power consumption, large contact capacity and other advantages. Specification: Item Type: Relay BoardWorking Voltage: 24V Working Current: Standby: 13MA 1 x Relay On: 41MA 2 x Relay On: 69MA 3 x Relay On: 95MA 4 x Relay On: 121MA 5 x Relay On: 149MA 6 x Relay On: 175MA 7 x Relay On: 199MA 8 x Relay On: 225MA 8 x photoelectric isolation input port (NPN is active at low level), the input and output relationship can be set to associated (default) and non-associated through commands. 6 Working Modes: Open, close, jog, self-lock, interlock, and delay Instruction supports 03 06 16 function code Maximum delay under command is 255 seconds AT commands can be input by serial port super terminal (serial assistant); in addition to the serial port hyper terminal input, the command can also be input by other.In command mode, up to 64 devices can be used in parallel. The default baud rate is 9600BPS, and the baud rate 2400 4800 19200 BPS can be selected through jumpers.. Package List: 1 x Relay Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.