usb serial adapter from $19.95 only at serial adapter source www.USBSERIAL.com
2x 422/485 USB 477
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2x 422/485 USB

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USB to Dual Serial port converter with DB9 connectors. RS-422/RS-485 Optical Isolation & Surge Protection
Features : USB-2COMi-SI-120V (120 volt, 60 hz version): USB to dual serial port converter with DB9 (9-pin male) connectors. RS-422/RS-485) Comes with a USB cable & power supply (120 volt, 60 hz). This model supplies Optical Isolation & Surge Protection. Each RS-422/485 port is individually optically isolated with 2000 volt DC optical isolation. The optical protects your PC or notebook from spikes and surges on the RS-422/485 network, by converting the electrical pulse into an optical signal and then changing it back into an electrical pulse. Your computer is well protected, since the surges and spikes cannot cross the optical link. Each RS-422/485 port is individually protected by surge prot...
Part No. USB-2COM-I-SI | View Details
$149.89
USB-2COMi-M USB to Dual RS-232/RS422/RS-485 Industrial Adapter
Features : VScom USB-2COMi-M USB to 2 RS422/485 ports adapter Serial ports on USB allow further use of existing devices, even when the computer doesn't offer serial ports. The high speed serial port with the 128 byte FIFO allow high speed communication, even in heavy loaded systems. Unique features reduce the system load. The serial port also allows unusual speed settings like 500.000bps. Features Metal case DIN-Rail mountable 2 RS422/485 DB9 male ports Terminal block Speed up to 921.6kbps No external power supply Specifications Ports 2 RS422/485 ports Speed Up to 921.6kbps RS422/485 signals RS422 TxD+/-, RxD+/-, RTS+/-, CTS+/-, GND RS485 Data+/-, GND Power U...
Part No. USB-2COMi-M | View Details
$149.98
USB to dual serial port converter with DB9 (9-pin male) connectors. RS-422/RS-485
Features : USB-2COMi l Adds two high speed RS-422/485 ports via USB connection. l 384 byte receive buffer. l 128 byte transmit buffer for high data throughput. l Auto transmit buffer control for RS-485. l Data rates: 300 bps to 230K bps. l Serial connector: Two DB-9 male connectors. l Easy connectivity to printers, POS, Industrial control devices. l Data signals: TX-, TX+, RX+, RX-, GND, RTS-, RTS+, CTS+, CTS-. l Self-powered. External power supply included. ...
Part No. USB-2COM-I | View Details
$99.89

usb serial adapter from $19.95 only at serial adapter source www.USBSERIAL.com