{"product_id":"allen-bradley-1785-bcm-b","title":"1785-BCM\/B","description":"\u003ch2\u003eOverview of Allen-Bradley 1785-BCM Backup Communications Module\u003c\/h2\u003e\n\u003cp\u003eThe Allen-Bradley 1785-BCM is a backup communications module for PLC-5 processors, designed to provide high-speed communication and system backup protection in redundant PLC configurations. It supports communication protocols including Data Highway Plus (DH+) and Remote I\/O (RIO), allowing rapid switchover between primary and backup processors via a High-Speed Serial Link (HSSL) operating at 1.2 Megabaud.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features of 1785-BCM\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eSingle-slot module installs in a 1771 I\/O chassis.\u003c\/li\u003e\n  \u003cli\u003eHigh-Speed Serial Link (HSSL) interface for rapid communication at 1.2 Megabaud.\u003c\/li\u003e\n  \u003cli\u003eTwo DH+\/Remote I\/O interfaces supporting network redundancy.\u003c\/li\u003e\n  \u003cli\u003eCompatible with PLC-5 processors: 5\/15 Series B, 5\/20, 5\/25, 5\/30, 5\/40, and 5\/60.\u003c\/li\u003e\n  \u003cli\u003eBuilt-in diagnostic\/status LEDs for communication channel monitoring.\u003c\/li\u003e\n  \u003cli\u003eConformal coated for harsh industrial environments.\u003c\/li\u003e\n  \u003cli\u003eNo external power required; powered from the backplane.\u003c\/li\u003e\n  \u003cli\u003eRelay output rating: 0.25A at 24 V DC, resistive load.\u003c\/li\u003e\n  \u003cli\u003eMaximum of 4 BCM modules per system.\u003c\/li\u003e\n  \u003cli\u003eTypical signal delay: 29 ± 8 ms (AC off), 30 ± 7 ms (DC off).\u003c\/li\u003e\n  \u003cli\u003eDimensions: 4.5 x 12.4 x 6.3 inches (115 x 317 x 160 mm).\u003c\/li\u003e\n  \u003cli\u003eWeight: Approximately 0.3 lbs (0.1 kg).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eRockwell Automation (Allen-Bradley)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eBackup Communications Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003ePLC-5\/15 Series B, 5\/20, 5\/25, 5\/30, 5\/40, 5\/60\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Interfaces\u003c\/td\u003e\n\u003ctd\u003e1 High-Speed Serial Link (HSSL), 2 DH+\/RIO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBus Communications\u003c\/td\u003e\n\u003ctd\u003eLocal PCI 2.3 Compliant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagnostic LEDs\u003c\/td\u003e\n\u003ctd\u003e1 per communication channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 60 °C (32 to 140 °F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eUL, CSA Industrial Control Equipment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current Load\u003c\/td\u003e\n\u003ctd\u003eApprox. 1 A @ 5 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower\u003c\/td\u003e\n\u003ctd\u003eNone external required (powered via backplane)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (HxWxD)\u003c\/td\u003e\n\u003ctd\u003e4.5 x 12.4 x 6.3 inches (115 x 317 x 160 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.3 lbs (0.1 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eApplications \/ Use Cases\u003c\/h2\u003e\n\u003cp\u003eThe 1785-BCM module is essential in high-availability PLC-5 control systems requiring fast failover from a primary to a backup processor to maintain process continuity. It is widely used in critical manufacturing, process control, and material handling applications demanding redundant control and reliable communication.\u003c\/p\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":47809567129899,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0837\/4671\/7995\/files\/Leadtime_1e39fe53-d560-4aa7-94b8-c718778311cc.png?v=1723546257","url":"https:\/\/leadtime.ca\/products\/allen-bradley-1785-bcm-b","provider":"LEADTIME","version":"1.0","type":"link"}