{"product_id":"communication-adapter-module-allen-bradley-1785-ka5","title":"Communication Adapter Module | Allen-Bradley 1785-KA5","description":"\u003cp\u003eThe Allen-Bradley \u003cstrong\u003e1785-KA5\u003c\/strong\u003e is a specialized communication adapter module designed to bridge Data Highway Plus (DH+) networks with RS-485 Data Highway (DH-485) networks. It facilitates seamless data exchange, program uploads, and downloads between PLC-5 processors and SLC 500 controllers. This unit enables multi-network industrial architectures to share messaging instructions efficiently without requiring external protocol conversion hardware.\u003c\/p\u003e\n\u003ch3\u003eOperational Modes and Network Integration\u003c\/h3\u003e\n\u003cp\u003eThe module operates in either gateway or router mode, depending on configuration switch settings. In gateway mode, DH+ devices initiate data transactions while connected SLC processors respond to read and write requests. Router mode supports flexible peer-to-peer messaging capabilities, allowing devices across both network topologies to interchange data packets reliably.\u003c\/p\u003e\n\u003ch3\u003eConfiguration and Physical Setup\u003c\/h3\u003e\n\u003cp\u003eConfiguration is handled through onboard DIP switch banks that establish station addresses and baud rates for each channel. The module supports a maximum DH-485 cable segment length of 1219 m using shielded twisted-pair media alongside compatible link couplers. Front-panel diagnostic LEDs provide real-time status indication for monitoring network health and troubleshooting communication faults.\u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1785-KA5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eCommunication Adapter Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNetwork Compatibility\u003c\/td\u003e\n\u003ctd\u003eData Highway Plus (DH+) to DH-485 (RS-485)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBaud Rate (DH+)\u003c\/td\u003e\n\u003ctd\u003e57.6 Kbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBaud Rate (DH-485)\u003c\/td\u003e\n\u003ctd\u003e300 bps to 19.2 Kbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum DH-485 Cable Length\u003c\/td\u003e\n\u003ctd\u003e1219 m (4000 ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Power Requirement\u003c\/td\u003e\n\u003ctd\u003e1.2 A at 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.82 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCategory\u003c\/td\u003e\n\u003ctd\u003ePLCs \/ Machine Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp\u003eFrequently Asked Questions\u003c\/p\u003e\n\u003cp\u003eQ: Can an SLC 500 processor initiate a message request to a PLC-5 device when the \u003cstrong\u003e1785-KA5\u003c\/strong\u003e is set to gateway mode?\u003c\/p\u003e\n\u003cp\u003eA: No. In gateway mode, DH+ devices must initiate all communication requests, while SLC processors on the DH-485 link function as responders only.\u003c\/p\u003e\n\u003cp\u003eQ: What baud rates are supported on the DH-485 side of the network?\u003c\/p\u003e\n\u003cp\u003eA: The DH-485 network channel supports selectable baud rates ranging from 300 bps up to 19.2 Kbps, configured via onboard DIP switches.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":53214236967192,"sku":"1785-KA5","price":270.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0892\/3483\/3688\/files\/1785-KA5_Cocoai.jpg?v=1794278502","url":"https:\/\/www.innoplcsync.com\/products\/communication-adapter-module-allen-bradley-1785-ka5","provider":"InnoPLC Sync Co., Ltd.","version":"1.0","type":"link"}