--- product_id: 97148617 title: "DC 12V Relay Module 16 Channel MODBUS RTU RS485 Relay Module Board PLC Controller Serial Port Switch" brand: "akozon" price: "€ 77.29" currency: EUR in_stock: true reviews_count: 2 category: "Akozon" url: https://www.desertcart.be/products/97148617-dc-12v-relay-module-16-channel-modbus-rtu-rs485-relay store_origin: BE region: Belgium --- # 12V DC working voltage MODBUS RTU serial communication 16 relay channels for versatile control DC 12V Relay Module 16 Channel MODBUS RTU RS485 Relay Module Board PLC Controller Serial Port Switch **Brand:** akozon **Price:** € 77.29 **Availability:** ✅ In Stock ## Summary > ⚙️ Master your automation game with 16-channel MODBUS power! ## 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?** € 77.29 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/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 - • **Flexible Command Modes:** Supports 6 command types including Open, Close, Delay, and Interlock for ultimate automation precision. - • **Power-Packed 12V Operation:** Reliable DC 12V power supply ensures stable performance for industrial-grade automation. - • **Expand Your Control Universe:** Manage up to 16 relay channels simultaneously, perfect for complex multi-device setups. - • **Energy-Efficient Standby Mode:** Ultra-low 11mA standby current keeps your system lean without sacrificing responsiveness. - • **Seamless MODBUS RTU Integration:** Effortlessly connect and control via RS485 serial port with industry-standard MODBUS protocol. ## Overview The DC 12V Relay Module is a robust 16-channel relay board designed for professional automation control via MODBUS RTU over RS485. It supports up to 64 devices in parallel, offers multiple command modes, and operates with low standby current, making it ideal for managing diverse industrial and smart home equipment with precision and efficiency. ## 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 | #1,176,303 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #208 in Voltage Monitoring Relays | | Brand | Akozon | | Brand Name | Akozon | | Coil Voltage | 12 volts | | Connector Type | Solder Or Screw | | Contact Current Rating | 10 A | | Contact Material | Copper | | Contact Type | Normally Closed | | Current Rating | 10 A | | Customer Reviews | 3.3 out of 5 stars 3 Reviews | | Item Weight | 7.84 ounces | | Manufacturer | Akozon | | Maximum Switching Current | 10 A | | Maximum Switching Voltage | 12 volts | | Minimum Switching Voltage | 12 volts_of_direct_current | | Mounting Type | Surface Mount | | Operation Mode | Automatic | | Part Number | Akozona765kd802g | | 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. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.be/products/97148617-dc-12v-relay-module-16-channel-modbus-rtu-rs485-relay](https://www.desertcart.be/products/97148617-dc-12v-relay-module-16-channel-modbus-rtu-rs485-relay) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-10-23*