---
product_id: 97148617
title: "DC 12V Relay Module 16 Channel MODBUS RTU RS485 Relay Module Board PLC Controller Serial Port Switch"
brand: "akozon"
price: "$93"
currency: NZD
in_stock: true
reviews_count: 2
category: "Akozon"
url: https://www.desertcart.nz/products/97148617-dc-12v-relay-module-16-channel-modbus-rtu-rs485-relay
store_origin: NZ
region: New Zealand
---

# 12V DC working voltage MODBUS RTU RS485 serial communication 16-channel relay control DC 12V Relay Module 16 Channel MODBUS RTU RS485 Relay Module Board PLC Controller Serial Port Switch

**Brand:** akozon
**Price:** $93
**Availability:** ✅ In Stock

## Summary

> 🔌 Power your automation with precision and scale—because control is the new cool!

## Quick Answers

- **What is this?** DC 12V Relay Module 16 Channel MODBUS RTU RS485 Relay Module Board PLC Controller Serial Port Switch by akozon
- **How much does it cost?** $93 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/97148617-dc-12v-relay-module-16-channel-modbus-rtu-rs485-relay)

## Best For

- akozon enthusiasts

## Why This Product

- Trusted akozon brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact & Durable:** Sleek 17x6.5x2 cm footprint with surface mount design, built to withstand demanding environments and streamline your control panel.
- • **Power-Packed Precision:** Operate up to 16 relays simultaneously with a stable 12V DC power supply, ensuring robust control for your industrial or smart home projects.
- • **Energy-Efficient Design:** Ultra-low standby current of just 11mA keeps your system lean and green without compromising performance.
- • **Versatile Command Modes:** Supports 6 dynamic commands including Open, Close, Momentary, Self-locking, Interlock, and Delay for ultimate operational flexibility.
- • **Seamless MODBUS Integration:** Effortlessly connect and control up to 64 devices in parallel via MODBUS RTU RS485 protocol—perfect for scalable automation setups.

## Overview

The DC 12V Relay Module 16 Channel MODBUS RTU RS485 is a high-performance relay board designed for professional automation control. It supports 16 relays with a 10A current rating each, operates on a 12V DC power supply, and communicates via MODBUS RTU over RS485, enabling control of up to 64 devices in parallel. Its low standby current and multiple command modes make it ideal for industrial, smart home, and PLC applications requiring reliable, scalable, and energy-efficient switching.

## Description

Specification: Working Voltage: DC 12V Standby Current: 11MA Load: 10A/250VAC, 10A/125VAC, 10A/30VDC, 10A/28VDC, 10A/12VDC Size: Approx. 17*6.5*2cm / 6.7*2.5*0.8in Weight: Approx. 224g/7.9oz Typical applications: MODBUS command mode (HEX), 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 1-100V or AC 85-265V control circuit,Wiring diagram below(Note:If not DC 12V load, need another DC 12V power supply). "LOAD" may be LED lights, fans, motors Lights, fluorescent lights, solar water heaters and other DC AC equipment. Package list: 1 * 16 Channel RS485 Relay

Review: Great board once the commands are found :) - Board works good so far in testing, will give it a good workout in a harsh environment (no temp/humidity control) soon and that will be the real test. If you want to get started quick, I generated some command strings from Various Sources including davedarko team on hackaday dot io visit that team for additional commands . Strings for up to 8 relays ON/OFF below generated from application called Modbus Tools . Basically, the string is composed of : Unit ID (set by the dip switches, this assumes switch 1 only is up (ID=1)) Mode (Write Register in this case) Register Location/Address ( from 0x0001 to 0x0010 for 16 relay board) Value to place in register (256 decimal = ON, 512= OFF, 768=Toggle, CRC (See MODBUS RTU SPEC as to how to calculate) Raw RTU in HEX per relay channel / state. COM CONNECTION AS TESTED: 9600, N , 8, 1 (Modbus Tools Defaults to Even parity which will sortof work with errors , but no errors with Parity set to None) FULL RTU WITH CRC Unit|mode|reg|value|crc 01 06 00 01 01 00 D9 9A 1 ON 01 06 00 02 01 00 29 9A 2 ON 01 06 00 03 01 00 78 5A 3 ON 01 06 00 04 01 00 C9 9B 4 ON 01 06 00 05 01 00 98 5B 5 ON 01 06 00 06 01 00 68 5B 6 ON 01 06 00 07 01 00 39 9B 7 ON 01 06 00 08 01 00 09 98 8 ON 01 06 00 01 02 00 D9 6A 1 OFF 01 06 00 02 02 00 29 6A 2 OFF 01 06 00 03 02 00 78 AA 3 OFF 01 06 00 04 02 00 C9 6B 4 OFF 01 06 00 05 02 00 98 AB 5 OFF 01 06 00 06 02 00 68 AB 6 OFF 01 06 00 07 02 00 39 6B 7 OFF 01 06 00 08 02 00 09 68 8 OFF
Review: Tried two boards. Neither Worked. Long shipping time. - Tried two boards. One the power light would turn on. The second, would respond to commands. I give up after 2.

## Features

- Working voltage is DC 12V.
- Standby current (all relays closed) is 11MA, 1 relay open 40MA, 2 relays open 67MA, 3 relays open 95MA, 4 relays open 121MA, 5 relays open 147MA, 6 relays open 173MA, 7 relays open 198MA, 8 relays open 222MA...
- 6 Commands: "Open", "close", "Momentary", "Self-locking", "Interlock" and "Delay".Under the MODBUS command mode, this relay module can support up to 64 devices in parallel.
- MODBUS RTU command control mode, the maximum delay is 255 seconds.
- MODBUS commands can be made serial HyperTerminal (serial assistant) or "Modbus Poll" enter.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07JQTMT5K |
| Best Sellers Rank | #1,022,054 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #209 in Voltage Monitoring Relays |
| Brand | Akozon |
| Coil Voltage | 12 Volts |
| Connector Type | Solder Or Screw |
| Contact Current Rating | 10 Amps |
| Contact Material | Copper |
| Contact Type | Normally Closed |
| Current Rating | 10 Amps |
| Date First Available | October 26, 2018 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 7.8 ounces |
| Manufacturer | Akozon |
| Maximum Switching Current | 10 Amps |
| Maximum Switching Voltage | 12 Volts |
| Minimum Switching Voltage | 12 Volts (DC) |
| Mounting Type | Surface Mount |
| Operation Mode | Automatic |
| Product Dimensions | 6.69 x 2.76 x 0.79 inches |
| Specification Met | Ma |
| UPC | 757686631591 |
| Wattage | 13.2 Milliwatts |

## Product Details

- **Connector Type:** Solder Or Screw
- **Contact Material:** Copper
- **Contact Type:** Normally Closed
- **Current Rating:** 10 Amps
- **Mounting Type:** Surface Mount

## Images

![DC 12V Relay Module 16 Channel MODBUS RTU RS485 Relay Module Board PLC Controller Serial Port Switch - Image 1](https://m.media-amazon.com/images/I/614IXEZasXL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great board once the commands are found :)
*by E***T on October 16, 2020*

Board works good so far in testing, will give it a good workout in a harsh environment (no temp/humidity control) soon and that will be the real test. If you want to get started quick, I generated some command strings from Various Sources including davedarko team on hackaday dot io visit that team for additional commands . Strings for up to 8 relays ON/OFF below generated from application called Modbus Tools . Basically, the string is composed of : Unit ID (set by the dip switches, this assumes switch 1 only is up (ID=1)) Mode (Write Register in this case) Register Location/Address ( from 0x0001 to 0x0010 for 16 relay board) Value to place in register (256 decimal = ON, 512= OFF, 768=Toggle, CRC (See MODBUS RTU SPEC as to how to calculate) Raw RTU in HEX per relay channel / state. COM CONNECTION AS TESTED: 9600, N , 8, 1 (Modbus Tools Defaults to Even parity which will sortof work with errors , but no errors with Parity set to None) FULL RTU WITH CRC Unit|mode|reg|value|crc 01 06 00 01 01 00 D9 9A 1 ON 01 06 00 02 01 00 29 9A 2 ON 01 06 00 03 01 00 78 5A 3 ON 01 06 00 04 01 00 C9 9B 4 ON 01 06 00 05 01 00 98 5B 5 ON 01 06 00 06 01 00 68 5B 6 ON 01 06 00 07 01 00 39 9B 7 ON 01 06 00 08 01 00 09 98 8 ON 01 06 00 01 02 00 D9 6A 1 OFF 01 06 00 02 02 00 29 6A 2 OFF 01 06 00 03 02 00 78 AA 3 OFF 01 06 00 04 02 00 C9 6B 4 OFF 01 06 00 05 02 00 98 AB 5 OFF 01 06 00 06 02 00 68 AB 6 OFF 01 06 00 07 02 00 39 6B 7 OFF 01 06 00 08 02 00 09 68 8 OFF

### ⭐ Tried two boards. Neither Worked. Long shipping time.
*by Y***E on November 24, 2021*

Tried two boards. One the power light would turn on. The second, would respond to commands. I give up after 2.

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-16*