Description
- DC 12V 4Ch RS485 Modbus & AT command Relay Board
- Two instruction-control mode : AT command and MODBUS command
- Under the MODBUS command mode, it can support up to 32 devices in parallel
- Size: 80 * 47 * 19.5mm
- Weight: 57g
Product Name: 4 Channel DC 12V RS485 Relay Module Modbus RTU & AT Command Remote Control Switch for PLC PTZ Camera Security Monitoring
Description:
1. DC 12V power supply (voltage range 9-13V )
2. Standby current (all relays closed) 11-13MA, 1 relay open 44MA, 2 relays open 77MA, 3 relays open 110MA,4 relays open 140MA
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. Under the MODBUS command mode, it can support up to 32 devices in parallel
8. Size: 80 * 47 * 19.5mm
9. Weight: 57g
10. Maximum load: 10A / 250VAC, 10A / 125VAC, 10A / 30VDC, 10A / 28VDC, 10A / 12VDC
the new version adds the Read Status command (command 03)
For more information, please contact me
Application
Automated industry PLC
Smart Home,Home Automation ,Wiser Home;
Identification system;
Motor FW & BW
Typical applications:
1. AT command mode (A5 = OFF), in this mode can be through the serial HyperTerminal (serial assistant) enter a simple AT command control relay. AT command mode time up to 9999 seconds
2. MODBUS command mode (A5 = ON), you can control a variety of ways: Serial Hyper Terminal Control (need to manually add the CRC), Modbus Poll software control (software automatically add the CRC), PLC or MCU process control