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Multifunction RS485 Relay NPN PNP IO Control Core Board Modbus Rtu AT Command Module

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                  Description: 
                   
                  1. Operating Voltage : DC 5V
                  2. Operating Current : 10-15mA
                  3. ''open'' ''close''  ''Momentary'' ''Self-locking'' ''Interlock'' ''Delay'' 6 Commands
                  4. Two instruction-control mode : AT command and MODBUS command
                  5. Under the AT command ,the maximum delay is 9999 seconds
                    Under the MODBUS command ,the maximum delay is 255 seconds
                  6. AT commands can be made serial HyperTerminal (serial assistant) Enter; MODBUS commands can be made serial HyperTerminal (serial assistant)  OR ''Modbus Poll'' Enter;
                  7. Automatic recognition of two kinds of commamds,no need to switch..
                  8. Under the MODBUS command mode, it can support up to 247 devices in parallel
                  9. With RS485 and RS232 (TTL) dual bus interface
                  10. Output control pins 16, 5V TTL level, low level (default) / high level output
                  11. Size: 40 * 30 * 22mm(A version); 40 * 30 * 11.5mm(B version)
                     
                  Application:
                      
                  Automated industry PLC
                  5V 12V 24V 1-16 Channel Relay Module
                  Smart Home,Home Automation ;
                  Identification system;
                  Motor FW & BW;
                  CCTV Camera PTZ Control; 
                  Security system;
                  LED dot matrix screen;
                  RS485 remote control;
                  Note: 
                  The relay board needs to be purchased separately or prepared by yourself.
                  Package Included:
                  1 x RS485 Relay NPN PNP IO Control Core Board

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