3pcs 8Channel DC 5V RS485 Modbus RTU Control Module UART Relay Switch Board PLC

Descriptions: - Operating Voltage : DC 5V(5V Version) - Operating Current : 10-15MA - ''open'' ''close'' ''Momentary'' ''Self-locking'' ''Interlock'' ''Delay'' 6 Commands - Two instruction-control mode : AT command and MODBUS command - Under the AT command ,the maximum delay is 9999 seconds - Under the MODBUS command ,the maximum delay is 255 seconds - AT commands can be made serial HyperTerminal (serial assistant) Enter; - MODBUS commands can be made serial HyperTerminal (serial assistant) OR ''Modbus Poll'' Enter; - Under the MODBUS command mode, it can support up to 247 devices in parallel - With RS485 and RS232 (TTL) dual bus interface - Output control pins 8, 5V TTL level, low level (default) / high level output - Size: 45 x 30 x 15mm Applications: Automated industry PLC Relay Module Smart Home,Home Automation ; Identification system; Motor FW & BW; CCTV Camera PTZ Control; Security system; LED dot matrix screen; RS485 remote control; Package Included: 3 x 8Channel DC 5V RS485 Modbus RTU Control Module UART Relay Switch