SPECIFICATIONS

1-Channel Input and Output with Anti-Reverse Connection Protection RTU 7-24V Relay Module RS485/Ttl

1.On-Board of mature and stable 8bit MCU and MAX485 level conversion chip
2.Protocol: supports standard Modbus RTU protocol
3.Communication Interface: support RS485/TTL UART interface
4.Communication baud rate: 4800/9600/19200, and the default 9600bps, support power-down save
6.The optocoupler input signal range: DC3.3- 30V (this input is not available for relay control)
7.Output signal: the relay switch signal Support Manual, Splash closed, Disconnected mode, flash closed/Flash
off of the latency base is 0.1, the maximum can be flash closed/disconnected at the right time
0xFFFF * 0.1S = 65535 * 0.1S = 6553.5S
8.
Device address: the scope of 1-255, which is 255 by default support power-down save
on-board 1 5V,10A/250V AC 10A/30V DC relay can be continuous suction
9.
100,000 billion times having a diode effusion protection and the response time is short
10.
On-board relay switch indicator lamp on
11.
Supply Voltage: DC7-24V with input anti-reverse polarity protection

simple instructions for use
Modbus relay module via RS485/TTL UART interface is received from the PC/MCU Modbus
REMOTE TERMINAL UNIT (RTU) instructions to perform the operations. The following is an example. PC software by RS485 interface to open the Relay 1
(Manual mode) as an example, it is assumed that the device address is 255, the baud rate to 9600, use, follow these steps:
1, VCC and GND, respectively connected with the cathode of the power supply and negative;
2, A + B- respectively USB to RS485 module at the output of the + and B- ;
3, open the host computer software Modbus RTU, point to configuration tools, select the correct port number baud rate selection
9600, the address is set to 255, click on the "open the serial port";
4, and click on the "JD1 open to open the Relay 1 at the same time of the relay 1 indicator light. As shown in the following figure: