{"product_id":"black-box-async-rs232-to-rs422485-interface-converter-db9-to-terminal-block-ic821a","title":"Black Box Async RS232 to RS422\/485 Interface Converter - DB9 to Terminal Block - IC821A","description":"\u003cdiv\u003e\n\u003ch4\u003e\u003cstrong\u003eGeneral Information\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cli\u003eManufacturer: Black Box Corporation\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eManufacturer Part Number: IC821A\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eManufacturer Website Address: http:\/\/www.blackbox.com\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBrand Name: Black Box\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eProduct Model: IC821A\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eProduct Name: Universal RS-232 to RS-422\/485 Converter\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMarketing Information: \u003cp\u003eThe BLACK BOX® Universal RS-232 to RS-422\/485 Converter with Opto-Isolation isolates and converts RS-232 signals into RS-422\/RS-485 signals and vice versa. Unlike other converters, external software is not required to control data flow. The RS-232 input is wired for DCE through a DB9 female connector, and RS-422\/RS-485 signals are interfaced through a removable terminal block. To supply external power to the terminal block, you need our 120-VAC\/12-VDC Wallmount Power Supply (PS1003). \u003cbr\u003e\u003cbr\u003eFor RS-232, the connection requires RD, TD, and Signal Ground. \u003cbr\u003e\u003cbr\u003eIn RS-422 mode, the driver is always enabled for full-duplex communications. A twisted pair is required for transmit, and a twisted pair is also required to receive. A ground reference wire is also needed. Switch settings are Switch 1: RS-422; Switch 2: Echo On; Switches 3 and 4: 4 Wire. \u003cbr\u003e\u003cbr\u003eIn both RS-485 modes, the RS-485 driver is automatically enabled during each space state by the presence of an RS-232 signal. When the RS-232 data is in a mark or idle state, the RS-485 driver is disabled and the RS-485 data lines are held in a mark state by the bias provided by a 4.7-ohm resistor; the value of this resistor may need to be changed, depending on the termination you use. \u003cbr\u003e\u003cbr\u003eTo connect to several RS-485 devices with minimal wire, select the unit's 2-wire, half-duplex RS-485 mode. When data is requested, the addressed device transmits and then reverts back to receive status. Switch settings for this mode are Switch 1: RS-485; Switch 2: Echo Off; Switches 3 and 4: 2 Wire. \u003cbr\u003e\u003cbr\u003eFor 4-wire master\/slave circuits, select the unit's 4-wire, full-duplex RS-485 mode. In this mode, addressed devices can receive data while transmitting data from a previous request. When used as a master in a single-master system, Switch 1 may be selected because the unit is the only transmitter in the system. When used as an RS-485 slave, the RS-232 device must provide addressability. Biasing in a master\/slave system is provided by the end-of-line slave. Switch settings for this mode are Switch 1: RS-485; Switch 2: Echo On; Switches 3 and 4: 4 Wire.\u003c\/p\u003e\n\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eProduct Condition: New\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eProduct Type: Transceiver\/Media Converter\u003cbr\u003e\n\u003c\/li\u003e\n\u003ch4\u003e\u003cstrong\u003eInterfaces\/Ports\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cli\u003eTotal Number of Ports: 2\u003cbr\u003e\n\u003c\/li\u003e\n\u003ch4\u003e\u003cstrong\u003ePower Description\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cli\u003ePower Source: Power Supply\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePlug\/Connector Type: Terminal Block\u003cbr\u003e\n\u003c\/li\u003e\n\u003ch4\u003e\u003cstrong\u003ePhysical Characteristics\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cli\u003eForm Factor: External\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHeight: 1.7\"\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWidth: 0.9\"\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDepth: 3.9\"\u003cbr\u003e\n\u003c\/li\u003e\n\u003ch4\u003e\u003cstrong\u003eMiscellaneous\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cli\u003eEnvironmentally Friendly: Yes\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCountry of Origin: United States\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTAA Compliant: Yes\u003cbr\u003e\n\u003c\/li\u003e\n\u003ch4\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cli\u003eLimited Warranty: 1 Year\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/div\u003e","brand":"Black Box Corporation","offers":[{"title":"Default Title","offer_id":50316133892453,"sku":"IC821A","price":175.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/4392\/0485\/files\/1013260734.jpg?v=1787261115","url":"https:\/\/itosolutions.net\/products\/black-box-async-rs232-to-rs422485-interface-converter-db9-to-terminal-block-ic821a","provider":"ITO Solutions, Inc.","version":"1.0","type":"link"}