SPECIFICATIONS

One-way/two-way/four-way Modbus relay module equipped with mature and stable 8-bit

MCU and RS485 level communication chip. RS485 communication using standard MODBUS RTU format Communication protocol, can realize 1/2/4 input signal detection, 1/2/4 relay output, can be used for digital detection or power control occasions.

Note: The module has no switch function, and requires careful purchase of switch control relays

1. Onboard mature and stable 8 bit MCU and MAX485 level conversion chip

2. Communication protocol: support standard ModbusRTU protocol

3. Communication interface: support RS485/TTL UART to C]

5. Communication baud rate: 4800/9600/ 19200, default 9600bps, support power-down save

6. Optocoupler input signal range: DC3.3-30V (this input cannot be used for relay control)

7. Output signal: relay switch signal, support manual, flash off, flash off mode, flash off/flash

The delay base of the off-time is 0.1S, and the maximum flash-off/flash-off time can be set to

0 XFFFF*0.1S=65535*0.1s=6553.5s

8. Device address: range 1-255, default 255, support power-down save.

9. Board 1 channel 5V, 10A/250V AC 10A/30V DC relay, which can be continuously pulled in 100,000 times,

With diode bleed protection, short response time

10. Onboard relay switch indicator light

11. Power supply voltage: DC7-24V, with input reverse polarity protection

1. VCC, GND: DC7-24V power input

2. DC3.3-30V optocoupler signal input:

N1 : Channel 1 positive

N2: Channel 2 positive

GND_ IN: Common terminal negative

3. A+, B-: RS485 communication interface, A+, B- are connected to A+, B- of external control terminal respectively

4. Relay 1 switch signal output

NC1; normally closed terminal, short-circuit with COM1 before the relay picks up, and hangs after picking up;

COM1: public terminal;

NO1: Normally open, the relay is suspended before closing, and short-circuited with COM1 after closing.

5. Relay 2 switch signal output

NC2: Normally closed terminal, short-circuit with COM2 before the relay picks up, and hangs after picking up;

COM2: public terminal;

NO2: Normally open, the relay is suspended before closing, and short-circuited with COM2 after closing.

6. Relay indicator light: light up when the relay is closed

7. GND, RXD, TXD: TTL level UART communication interface, GND, RXD,

TXD is connected to GND, TXD, RXD of external control terminal respectively