Black Box SP390A-R3 USB to RS422/485 Converter with Opto-Isolation

Features:

• 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.

• 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