{"product_id":"1756-dh485-allen-bradley-controllogix-dh-485-communication-bridge-module","title":"1756-DH485 | Allen-Bradley | ControlLogix DH-485 Communication Bridge Module","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-DH485\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efunctions as a high-speed communication bridge within the Allen-Bradley ControlLogix chassis. It enables seamless data exchange between the powerful ControlLogix platform and legacy DH-485 networks. This\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eoriginal module facilitates messaging to SLC 500, MicroLogix, and HMI terminals, ensuring your modern controller maintains full visibility over existing plant-floor hardware. Although the manufacturer officially discontinued this series, we provide factory-new units to support your critical infrastructure maintenance and system expansions.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003eThe 1756-DH485 delivers robust networking capabilities through the following technical parameters:\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eModule Type\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eCommunication Bridge\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eNetwork Support\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eData Highway 485 (DH-485)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eChannel Count\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTwo (2) Independent DH-485 Channels\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e24V DC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eChassis Compatibility\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1756 ControlLogix (Any Slot)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBackplane Current\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e850 mA @ 5.1V DC; 1.7 mA @ 24V DC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.51 lbs (0.23 kg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMessaging Support\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eScheduled and Unscheduled\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eLegacy Network Bridging:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThis module eliminates the need for complex protocol converters by allowing a ControlLogix CPU to act as a master or peer on a DH-485 link. It directly addresses the challenge of extracting data from older SLC 500 or MicroLogix controllers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDual-Channel Flexibility:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eTwo independent ports allow the module to manage two separate DH-485 networks simultaneously. This architecture doubles your connectivity throughput without consuming additional rack space.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSimplified Configuration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 1756-DH485 integrates directly into the Studio 5000 \/ RSLogix 5000 I\/O tree. Engineers map tags and execute MSG (Message) instructions using standard industrial logic, reducing commissioning time.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRobust 24V DC Hardware:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDesigned for high-availability environments, the module draws stable power directly from the 1756 backplane. Its rugged housing resists electromagnetic interference (EMI) commonly found in high-voltage motor control centers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a refurbished or used unit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. We supply this 1756-DH485 as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eoriginal stock. Despite its discontinued status by the manufacturer, our units remain in factory-sealed condition to ensure maximum MTBF (Mean Time Between Failure).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan this module reside in a remote I\/O rack?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. You can install the 1756-DH485 in a local ControlLogix chassis or a remote chassis linked via EtherNet\/IP or ControlNet, providing significant layout flexibility for large-scale facilities.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhich cables do I need for the DH-485 connection?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe module typically utilizes the 1761-CBL-AS03 or 1761-CBL-AS09 cables for connection to peripheral devices. Always verify the pinout requirements of your specific HMI or SLC controller before installation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it support DH+ (Data Highway Plus)?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The 1756-DH485 specifically handles the DH-485 protocol. If your system requires Data Highway Plus connectivity, you must utilize the 1756-DHRIO module instead.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":53203169804472,"sku":"1756-DH485","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/1756-DH4851.jpg?v=1774950719","url":"https:\/\/www.globalpetroparts.com\/products\/1756-dh485-allen-bradley-controllogix-dh-485-communication-bridge-module","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}