Where can I download the software for this board ?

Hi, you can download from this link: http://s3.amazonaws.com/s3.image.smart/download/101-70-208/101-70-208.zip

is the ground pin of each channel connected together or each channel is totally isolated?

Hi, the ground of the control terminals is connected together, and each channel at the input is completely isolated.

Why do the commands not work when input into a serial terminal connected to the com port assigned? using putty 9600bps 8n1 i have added \r\n

Not sure what you entered there and if you have a proper serial port through the USB interface. Note there are many bytes to fransfer including a checksum if I remember correctly. (Did create some Python code which uses python usb)

Is it possible to expand this module to control more than 16 channels? If no, any other alternatives plz?

You can use a RPI with for example 4 modules, but It's better using 8-Channel USB because it contains serial number, so you have the possibility to identifiy witch module you use. It isn't possible with 2 module 16 channels on a RPI.

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SainSmart 16-Channel 9-36V USB Relay Module

SainSmart 16-Channel 9-36V USB Relay Module

Product ID: 369174476

Details

Connector type
Usb
Contact material
Silver
Contact type
Normally Open
Current rating
10 Amps
Mounting type
PCB Mount

⚡Supports 9-36V DC power supply

💡10A/250V max switching load

🔌16 SPDT relays for versatile control

436 Lei

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Description

⚙️ Command your smart space with 16 channels of power!

VISUAL FEEDBACK - Individual LED indicators for each relay ensure instant status monitoring.
HIGH LOAD CAPACITY - Handles up to 10A at 250V AC, perfect for home and industrial applications.
WIDE VOLTAGE RANGE - Operates efficiently from 9V up to 36V DC for flexible deployment.
POWER YOUR AUTOMATION - Robust 16-channel relay board to control multiple devices seamlessly.
PLUG PLAY USB CONTROL - Easily integrate with PCs or embedded systems via USB for smart automation.

The SainSmart 16-Channel 9-36V USB Relay Module is a professional-grade, opto-isolated relay board featuring 16 SPDT relays capable of switching loads up to 10A at 250V. Designed for home automation, robotics, and industrial control, it supports a wide DC power range (9-36V) and offers USB connectivity for seamless PC integration. Each relay includes an LED indicator for real-time status, making it an essential tool for millennial managers seeking reliable, scalable smart control solutions.

Specifications

ASIN	B0793MZH2B
Best Sellers Rank	#84,991 in Computers ( See Top 100 in Computers ) #684 in Motherboards
Brand Name	sainsmart
Coil Voltage	36 Volts
Connector Type	Usb
Contact Current Rating	10 Amps
Contact Material	Silver
Contact Type	Normally Open
Current Rating	10 Amps
Customer Reviews	3.7 3.7 out of 5 stars (39)
Manufacturer	SainSmart
Maximum Switching Current	10 Amps
Maximum Switching Voltage	36 Volts
Minimum Switching Voltage	9 Volts
Mounting Type	PCB Mount
Operating Time	0.5 Seconds
Operation Mode	Automatic
Part Number	USB Relay Module
Wattage	90 watts

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436 Lei

Duties & taxes included

In stock

Sold byAmazon RomaniaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Romania.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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