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

Description 1 Operating Voltage DC 5V2 Operating Current 10 15mA3 open close Momentary Self locking Interlock Delay 6 Commands4 Two instruction control mode AT command and MODBUS command5 Under the AT command the maximum delay is 9999 secondsUnder the MODBUS command the maximum delay is 255 seconds6 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 parallel9 With RS485 and RS232 TTL dual bus interface10 Output control pins 16 5V TTL level low level default high level output11 Size 40 30 22mm A version 40 30 11 5mm B version Application Automated industry PLC5V 12V 24V 1 16 Channel Relay ModuleSmart Home Home Automation Identification system Motor FWBW 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