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 load per relay

🔌16 SPDT relays for versatile control

Bs.1618

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Description

🔗 Connect, Control, Conquer: Power Your Projects Like a Pro

OPTO ISOLATED SAFETY - Built-in opto-isolation ensures reliable, noise-free operation and protects your circuits.
SEAMLESS USB CONTROL - Plug-and-play USB interface for effortless device switching and automation.
ROBUST POWER HANDLING - Handles up to 10 Amps and 250 Volts, perfect for heavy-duty home and robotics projects.
EXPAND YOUR SMART HOME - 16 channels let you automate multiple devices simultaneously—upgrade your space with ease.
INSTANT VISUAL FEEDBACK - Individual LEDs for each relay plus power indicators keep you informed at a glance.

The SainSmart 16-Channel USB Relay Module is a high-performance, opto-isolated board designed for professional-grade home automation and robotics. Featuring 16 SPDT relays, it supports a wide DC voltage range (9-36V) and can switch loads up to 10A/250V. With USB connectivity and LED indicators, it offers precise, reliable control for multiple electrical devices, making it an essential tool for tech-savvy managers and innovators.

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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Bs.1618

Duties & taxes included

In stock

Sold byAmazon BoliviaDelivered 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 Bolivia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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5 days ago

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