Black Box SP390A-R3 USB to RS422/485 Converter with Opto-Isolation, 2 Ports, 5 Year Warranty
Black Box SP390A-R3 USB to RS422/485 Converter with Opto-Isolation, 2 Ports, 5 Year Warranty
Black Box SP390A-R3
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Warranty and Support: Products purchased from authorized partners typically come with the full manufacturer's warranty. Additionally, should you encounter any issues, you're more likely to receive prompt and official support, including repairs, replacements, or troubleshooting assistance.
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Resale Value: Products purchased from authorized dealers often retain a higher resale value. The assurance of authenticity and transferable warranties can make them more attractive to future buyers.
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These benefits, combined, create a compelling argument for choosing authorized partners over unauthorized resellers, especially for high-value items or when product authenticity and after-sales support are critical considerations.
- Free Shipping
- 5 Year Warranty
- 30 Day Returns
- Carbon Neutral
Product Key Features
- Get the range and multidrop capability of RS-422/-485 from your PC's USB port
- Also protects PCs and other connected devices from surges and spikes
- Ideal for use in environments heavily susceptible to voltage spikes and ground loops
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Black Box
SP390A-R3
- Great for linking older serial devices to computers or laptops with USB ports.
- Offers 2-wire RS-485 or 4-wire RS-422/RS-485 operation.
- Holds connections tight with its high-retention USB connector.
- USB 1.0, USB 1.1, and USB 2.0 compatible (12 Mbps).
- Interface powered. No external power required.
- Serial terminal block can be removed for easy wiring.
- LEDs indicate transmitting and receiving of data.
This compact device quickly converts USB port connections to RS-422/485 so you can connect legacy serial devices to a newer PC or laptop. Continue to use legacy commercial and industrial RS-422/485 devices without making any changes to the applications written for them.
Plus, because it features 2000-volt optical isolation, you can protect your PC and other equipment from dangerous spikes and surges on the RS-485/RS-422 network.
Simply plug it into your PC's USB port using the included USB cable (3-ft.), then configure its DIP switches for 2- or 4-wire operation. The converter will show up as an additional COM port in your PC's Windows Device Manager.
Return Policy |
Time to Return |
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Standard Return Policy |
We offer a hassle-free 30-day returns policy for domestic (US) orders, excluding non-refundable items. Refund or Replacement within 30 days of the delivery date. All products that fall under the Standard Return Policy qualify for our 30-Day Hassle-Free Returns. Please see the section above for more details. |
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Replacement Only Return Policy |
Replacement within 30 days of the delivery date. |
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Manufacturer Only Return Policy |
Covered by the manufacturer's warranty. Please refer to the terms and conditions for the manufacturer's warranty or contact the manufacturer. |
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Holiday Extended Return Policies |
Extended Holiday Return Policy.Qualifying purchases of products displaying the " Extended Holiday Return Policy ", from November 1st, 2023 to December 25, 2023, are eligible for a Refund or Replacement until January 31, 2024. Extended Holiday Replacement-Only Return PolicyQualifying purchases of products displaying the " Extended Holiday Replacement-Only Return Policy ", from November 1st, 2023 to December 25, 2023, are eligible for a Replacement until January 31, 2024. |
