7-24V Modbus RTU 4, Channels Relay Module, RS485/TTL Anti-Reverse, Connection


In stock

SKU: 1121268
  1. On-board Chip: MAX485
  2. Communication protocol:  Modbus RTU protocol
  3. Communication interface: Support RS485 / TTL UART interface
  4. Operating Voltage: 5VDC
  5. No. of Channel: 4



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Brand: Generic
Category: Relay Modules
Tags: Modbus Relay modules

LC 4 channel Modbus relay module equipped with mature and stable 8-bit MCU and RS485 level communication chip adopt standard MODBUS RTU format RS485 communication protocol, It can realize 4-way input signal detection and 2-way relay output, can be used for digital detection or power control occasions.


  1. On-board mature and stable 8bit MCU and MAX485 level conversion chip
  2. Communication protocol: support standard Modbus RTU protocol
  3. Communication interface: Support RS485 / TTL UART interface
  4. Communication baud rate: 4800/9600/19200, default 9600bps, support power saving
  5. Photocoupler input signal range: DC3.3-30V (This input cannot be used for relay control)
  6. Output signal: relay switch signal, support manual, flash-off, flash-off mode, the delay base of flash-off / flash-off is 0.1S, the maximum settable flash-off / flash-off time is 0xFFFF * 0.1S = 65535 * 0.1 S = 6553.5S
  7. Device address: range 1-255, default 255, support power-down save
  8. Onboard one 5V, 10A / 250V AC 10A / 30V DC relay,
  9. Continuously attract 100,000 times, with diode leakage protection, short response time
  10. Onboard relay switch indicator
  11. Supply voltage: DC7-24V, with input anti-reverse protection
  12. Board Dimension(L x W x H) mm: 90 x 92 x 20
  13. Weight: 92gm

Package includes:

1  x  7-24V Modbus RTU 4 Channel Relay Module RS485

SKU: 1121268 Category: Tag:
On-board Chip


Communication Protocol

Modbus RTU protocol

Communication Interface

Support RS485 / TTL UART interface

Operating Voltage (VDC)


No. of Channels


Shipment Weight

0.1 kg

Shipment Dimensions

8 × 5 × 3 cm

15 Days Warranty

This item is covered with a standard warranty of 15 days from the time of delivery against manufacturing defects only. This warranty is given for the benefit of Robu customers from any kind of manufacturing defects.  Reimbursement or replacement will be done against manufacturing defects.

What voids warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

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Country Of Origin: China