DTECH RS232 to RS485 / RS422 Serial Communication Data Converter Adapter Mini-Size<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> Pro grade RS232 to RS485 / RS422 converter. It easily lets you connect any RS485 or RS422 device directly to COM port. </span></li><li><span class="a-list-item"> Best solution for the communication between serial port and RS485 or RS422 device. </span></li><li><span class="a-list-item"> Unique serial charge pump drive technology， no external power supply， the real three-wire communication (TXD，RXD，GND). No need serial port initialization. </span></li><li><span class="a-list-item"> Supports baud rates up to 115.2 Kbps; Automatic sense serial signal rate. </span></li><li><span class="a-list-item"> Supports a maximum connection distance of 4000ft (1200m) </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41%2BUI3o8jeL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41aUxFNjTVL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41U355SJaOL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51EuWzeaodL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51t1wILVXOL.jpg" noproxy>