220V Power Supply Modbus RTU 4 Channels Relay Module RS485/TTL UART

• Model Number:4 way relay module
• Dissipation Power:10A
• Supply :3324v
• Application:Computer
• Condition:New
• Type:Module
• Origin:Mainland China

220V four-way Modbus relay module
220V four-way Modbus relay module is equipped with mature and stable 8-bit MCU and RS485 level communication chip. RS485 communication protocol in standard MODBUS RTU format can realize 4-way input signal detection and 4-way relay output, which can be used for digital quantity detection or power control.

1. Mature and stable 8-bit MCU and MAX485 level conversion chip on board;
2. Communication protocol: support standard Modbus RTU protocol;
3. Communication inter: support RS485/TTL UART inter;
4. Communication baud rate: 4800/960o/19200, default 9600bps, support power-off saving;
5. Input signal range of optocoupler: DC3.3-24V (this input cannot be used for relay control);
6. Output signal: relay switch signal, supporting manual, flash close and flash break modes. The delay base of flash close/flash break is 0.1S, and the maximum set flash close/flash break time is OxFFFF * 0.1S=6553.5S;
7. Device address: range 1-255, default 255, support power-off saving;
8. On-board 4-circuit 5V, 10A/250V AC 10A/30V DC relay, capable of continuous closing for 100000 times, with diode leakage protection and short response time;
9. On-board 4-circuit 5V, 10A/250V AC 10A/30V DC relay, capable of continuous closing for 100000 times, with diode current protection and short response time
10. On-board relay switch indicator;
11. Power supply : AC220V;

Board size: 93 * 87mm Weight 100g

1. Power input: AC 220V power input terminal;
2. Indicator: four-way relay indicator and power indicator;
3. DC3.3-24V optocoupler signal input:
IN1: channel 1 positive
IN2: channel 2 positive IN3: channel 3 positive IN4: channel 4 positive GND_ IN: negative pole of common terminal
4, A , B -: RS485 communication inter, A , B - are respectively connected to A , B - of external control terminal;
5, GND, RXD, TXD: TTL level UART communication inter, GND, RXD
TXD is connected to GND, TXD and RXD of the external control terminal, and supports the connection of 3.3V/5V external TTL serial port;
6. RS485 and TTL serial port selection. When RS485 communication is used, DI is connected to TXD and RO is connected to RXD; When using TTL communication, both DI and RO are connected to the NC terminal.
7, 4-way independent relay switch signal output:
NC,: normally closed end, the relay is short-circuited with COM before closing, and suspended after closing; COM: public terminal;

Return: FF OF 00 00 000841 D36, close all relays
Send: FF OF 00 00 00 0801 00 70 5D Return: FF OF 00 00 00 08 41 D3
7. Set the device address to 1
Send: 00 10 00 00 00 010200 01 6A00 Return as is: 00 10 00 00 0102 00 01 6A 00 Remarks: The 9th byte of the sent frame Ox01 is the written device address
8. Set the device address to 255
Send: 00 10 00 o0 o0 o1 02 00 FF EB 80 Return as is: 00 10 00 00 00 01 02 00 FF EB 80 Remarks: The 9th byte of the sent frame OxFF is the device address written
9. Read the device address
Send: 00 03 00 00 00 01 85 DB Return: 00 03 02 00 FF C5 C4
Note: The fifth byte of the returned frame OxFF is the read device address
10. Read the relay status
Send: FF 01 00 o0 00 08 28 12 Return: FF01 01 01 A1AO
Note: BitO-Bit7 of the fourth byte 0x01 of the returned frame represents relay 1 - relay 8, 0 is off, 1 is on

11. Read the optocoupler input status
Send: FF02 00 00 08 6C 12 Return: FF0201 0151 AO
Note: IN1 - IN8 of the fourth byte of the returned frame Ox01 represents the input signal of optocoupler 1 - optocoupler 8, 0 represents low level, 1 represents high level
12. Set the baud rate to 4800
Send: FF 10 03 E9 00 o102 00 02 4A0C Return: FF 10 03 E9 00 o1 C5A7
Note: The 9th byte of the transmitted frame is the baud rate setting value, Ox02, 0x03 and x04 respectively represent 4800960019200
13. Set the baud rate to 9600
Send: FF10 03 E9 00 01 02 00 03 8B CC Return: FF 10 03 E9 00 01C5 A7