Features 1.4 Channel: This is a 4 channel relay module, with 9600 BPS default baud rate, the baud rate can be selected into 2400 4800 9600 19200 38400 57600 115200 BPS 2.Multi Mode: The input and output relationship can be set to various association modes through instructions 3.64 Parallel Support: In instruction mode, the relay module can support up to 64 devices in parallel, the instruction can be entered through the serial port hyper terminal 4.Multifunctional: This relay module includes hardware reset function and TVS anti surge protection, safe and reliable to use 5.Stable Performance: The relay board has been precise welded and wired, provides stable performance, practical, easy to operate and use Specification Item Type: RS485 Relay Module Material: PCB Working Voltage: DC 12V Standby Current: 11MA, 1 relay open 30MA, 2 relays open 49MA, 3 relays open 65MA, 4 relays open 82MA Default Baud Rate: 9600BPS Baud Rate can be Selected by Commands: 2400 4800 9600 19200 38400 57600 115200BPS Maximum Data Sending and Returning Time: 1000ms Check Mode: No check, even check and odd check Hardware Reset Function: Yes TVS Anti Surge Protection: Yes Package List 1 x RS485 Relay Module