Features With 6 Instructions: Relay control module come with open, close, Momentary, self lock, Interlock, Delay 6 instructions. Various Input Method: In addition to the serial hyperterminal input, the command can also be input through for Poll. Connect 64 Devices In Parallel: In command mode, up to 64 devices can be connected in parallel, versatile and multifunction. Excellent Performance: The command of this serial switch board supports the 03 06 16 function code, the maximum delay under the command is 255 seconds, and the default baud rate is 9600BPS. Scratch Resistant ABS Material: The 15 channel RS485 RS232 relay control module ia made of good quality ABS material, possess good impact resistance, scratch resistance, environmentally friendly. Specification: Item Type: Relay Control Module Material: ABS Working Voltage: DC24V Working Current: Standby 14MA, 1 relay 44MA, 2 relay 69MA, 3 relay 95MA, 4 relay 121MA, 5 relay 149MA, 6 relay 175MA, 7 relay 199MA, 8 relay 226MA, etc. Command supports 03 06 16 function code Maximum delay under command is 255 seconds Default Baud Rate: 9600BPS Baud Rate Can Be Selected By Jumper: 2400, 4800, 19200, 38400, 57600, 115200BPS Check mode can choose no check, even check, odd check Data sending return time can be set, the maximum can be set to 1000ms Package List: 1 x Relay Control Module Note: Please pay attention to correct operation. Package List 1 x Relay Control Module