The unit is functioning as expected. However, after it's use more, the unit cause computer to crash, when turning the on/Off a few time, the program hang up on the write command. The computer needed to reboot to recover. Any idea about this issue ? There are posts on the web that shows the similar issues. Do you have …

i know this question is old, but other people might be having the same problem. I had the same problem after so much iteration of write. what i did was clear the cache. the memory can only hold so much write before it hangs. I clear the cache before every write. it worked for me

Do they provide a tool to control the board through command line?

You can download a sample tool from them which controls it via gui. I never saw a command line tool. It wasnt hard to integrate their commands into my own platform so a basic coder could probably make you a command line tool.

Can this be used to give nc / no contacts?

I'm not sure of your question. This card has eight relays. Each relay has three screw clamp terminals where one is normally open, one is normally closed and the last is the common. So you can wire your device(s) to any or all relays in either normally open or closed position as you like. I hope this clarifies things.

I want use as programmable sequential controller for my business led street sign, this unit need computer for program only or need computer to run.

You would need it connected to a computer. This unit does not have any sort of programmable timers or states. It is more or less a light switch you control via a computer button.

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SainSmart USB Eight Channel Relay Board for Automation - 12 V

SainSmart USB Eight Channel Relay Board for Automation - 12 V

Product ID: 3243676

Details

Connector Type
Solder
Contact Material
Copper
Contact Type
Spdt
Current Rating
10 A
Mounting Type
Panel Mount

⚡Supports up to 10A high current switching

🔌8 SPDT relays for versatile control

🛡️Extra PCB openings for superior voltage isolation

₱5095

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Description

⚙️ Automate like a pro — 8 channels, zero limits!

HIGH CURRENT READY - Handles up to 10A per channel, perfect for demanding industrial and home automation projects.
8 CHANNEL POWERHOUSE - Control multiple devices seamlessly with 8 SPDT relays designed for professional automation setups.
PLUG PLAY AUTOMATION - USB connectivity with software support makes integration into your smart setup effortless and efficient.
ROBUST COPPER CONTACTS - Durable copper contact material guarantees reliable switching and long-lasting performance.
ENHANCED VOLTAGE ISOLATION - Extra PCB openings ensure safer, cleaner electrical separation to protect your system.

The SainSmart USB Eight Channel Relay Board is a 12V automation solution featuring 8 SPDT relays with 10A current capacity, enhanced voltage isolation via extra PCB openings, and durable copper contacts. Designed for seamless USB integration and reliable high-current switching, it’s ideal for industrial and home automation enthusiasts seeking robust, scalable control.

Specifications

ASIN	B0093Y89DE
Best Sellers Rank	#150,235 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #43 in Solid State Relays
Brand Name	SainSmart
Coil Voltage	12 volts
Connector Type	Solder
Contact Material	Copper
Contact Type	Spdt
Current Rating	10 A
Customer Reviews	4.1 4.1 out of 5 stars (124)
Manufacturer	SainSmart
Maximum Switching Current	10 A
Maximum Switching Voltage	12 volts
Minimum Switching Voltage	11 volts
Model	8541582310
Mounting Type	Panel Mount
Operation Mode	Automatic
Part Number	11601
Unit Count	8 Count
Wattage	120 watts

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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₱5095

Duties & taxes included

In stock

Sold byAmazon PhilippinesDelivered 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 Philippines.

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TrustScore 4.5 | 7,300+ reviews

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