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R428A01 2 in 1 RS485 & RS232(TTL) AT & Modbus RTU Relay Switch Board PC USB COM UART Serial port 1 Channel 12VDC Module

R428A01 2 in 1 RS485 & RS232(TTL) AT & Modbus RTU Relay Switch Board PC USB COM UART Serial port 1 Channel 12VDC Module

R428A01

9474 in stock

$3.98
$3.98 $3.98
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Product Name: 2 in 1 RS485 & RS232(TTL) AT & Modbus RTU Relay Switch Board PC USB COM UART Serial port 1 Channel 12VDC Module
 
 
Package inlcuded:
 1 x DC 12V 1Ch RS485 Modbus & AT command  Relay Board
Description: 
1: DC 12V power supply
 
2: Standby current (all relays closed) 9MA, 1 relay open 41MA
 
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 247 devices in parallel
 
8 Size: 40 * 30 * 18mm ;
 
9 Weight: 18 g; 
 
10 Maximum load: 20A 14VDC;20A/125VAC;10A/250VAC
 
Instruction manual Please ask us after the purchase
Application
Automated industry PLC
Smart Home,Home Automation ;
Identification system;
Motor FW & BW;
CCTV Camera PTZ Control;
Security system;
LED dot matrix screen;

 
Typical applications:
1 AT command mode (M0 Connect), 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 (M0 disconnect), 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


Wiring Diagram:

1 DC 12V control circuit,Wiring diagram below. ''LOAD'' may be camera,LED lights, fans, motors and other DC 12V equipment

2 DC 12V motor reversing control, Wiring diagram below. ''LOAD'' can be Fans, motors, pumps and other DC 12V equipment

Test Software(We offer a demo video):
Serial HyperTerminal:

Modbus Poll


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