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Click to enlarge SP390A-R3
SP390A-R3  Black Box Corporation ®  
Black Box USB to RS422/485 Converter with Opto-Isolation - - USB - USB - TAA Compliant
Type: Transceiver/Media Converter
Condition: New Retail Box (Only available for shipment within the Continental United States)
MSRP: $239.75
Our Price: $191.62
Savings: $48.13 (20%)
Final Price: $191.62
Quantity: of 1 available for Special Order  
Quantities greater than what is in stock will need to be back-ordered.
** This item is a SPECIAL ORDER item and does not include Express Technology's standard warranty and terms. Click here to review our complete Special Order Policy & Terms.
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Inventory updated on date: May 01, 2024 1:00:00 AM
Product Details for SP390A-R3
SP390A-R3: Black Box USB to RS422/485 Converter with Opto-Isolation - - USB - USB - TAA Compliant
Technical Details
Product Type Transceiver/Media Converter
Manufacturer Part Number SP390A-R3
Manufacturer Website Address http://www.blackbox.com
Marketing Information
  • 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.
Power Source USB
Limited Warranty 5 Year
Manufacturer Black Box Corporation
Product Model SP390A-R3
Product Name USB to RS422/485 Converter with Opto-Isolation
Brand Name Black Box
Country of Origin United States
Height 3"
Width 1.7"
Depth 0.8"
Environmentally Friendly Yes
USB Yes
Total Number of Ports 2
TAA Compliant Yes
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Additional Information for SP390A-R3
Computer Parts90 Day Replacement Warranty on all goods from our shelves.
Computer PartsSpecial Orders - All sales are final. No returns. (see Special Order Policy & Terms section for full details)
Computer PartsEquipment condition is used and fully tested by ETI technicians unless expressly noted.
Computer PartsPlease contact Express Technology Incorporated if you are looking for a new product.
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