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🔌 Power your automation with precision and scale—because control is the new cool!
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.
| 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 |
E**T
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
Y**E
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.