{"product_id":"dual-channel-dh-485-module-1756-dh485-allen-bradley","title":"Dual-Channel DH-485 Module 1756-DH485 Allen-Bradley","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe Allen-Bradley 1756-DH485 is a ControlLogix dual-channel DH-485 communications module. It bridges ControlLogix systems to existing DH-485 networks for messaging with SLC 500 and other legacy devices.\u003c\/p\u003e\n\u003ch3\u003eKey Specs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCatalog Number: 1756-DH485\u003c\/li\u003e\n\u003cli\u003eChannels: 2 independent DH-485 ports\u003c\/li\u003e\n\u003cli\u003eCommunication rates: 9600 or 19200 bps\u003c\/li\u003e\n\u003cli\u003eBackplane current: 850 mA @ 5.1V DC, 1.7 mA @ 24V DC\u003c\/li\u003e\n\u003cli\u003ePower dissipation: 4.5 W\u003c\/li\u003e\n\u003cli\u003eIsolation: 50V continuous\u003c\/li\u003e\n\u003cli\u003eCIP connections: Up to 32\u003c\/li\u003e\n\u003cli\u003ePorts: Two 9-pin D-shell connectors\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Choose This\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEnables seamless integration of legacy DH-485 devices\u003c\/li\u003e\n\u003cli\u003eDual independent channels for flexible network design\u003c\/li\u003e\n\u003cli\u003eSupports both DH-485 and CIP messaging\u003c\/li\u003e\n\u003cli\u003eAlphanumeric display for local status monitoring\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCan it replace a 1747-KE module? It provides similar bridging functionality within ControlLogix.\u003c\/li\u003e\n\u003cli\u003eWhat cable is used? 1756-CP3 or equivalent for connection to AIC converters.\u003c\/li\u003e\n\u003cli\u003eIs it recommended for new systems? Primarily for existing DH-485 network expansion or migration.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMounting Steps\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eInstall the module in any ControlLogix chassis slot.\u003c\/li\u003e\n\u003cli\u003eConnect each channel to the DH-485 network via AIC or direct cabling.\u003c\/li\u003e\n\u003cli\u003eApply power and observe the alphanumeric display for node address and status.\u003c\/li\u003e\n\u003cli\u003eConfigure link IDs and routing table using RSLinx and Studio 5000.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eBuying Advice\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUse when migrating or expanding systems that still rely on DH-485.\u003c\/li\u003e\n\u003cli\u003ePlan unique link IDs for each channel.\u003c\/li\u003e\n\u003cli\u003eVerify network baud rate matches all connected devices.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":50172689973386,"sku":"1756-DH485","price":180.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0698\/2818\/2154\/files\/1756-DH485_cb6d6063-188b-424b-b97c-2cf893bb591b.jpg?v=1789022329","url":"https:\/\/www.cambiaplc.com\/products\/dual-channel-dh-485-module-1756-dh485-allen-bradley","provider":"Controlix Automation","version":"1.0","type":"link"}