{"product_id":"allen-bradley-1738-ob16em12-digital-output-module","title":"Allen-Bradley 1738-OB16EM12 Digital Output Module","description":"\u003ch1\u003eAllen-Bradley 1738-OB16EM12 Digital Output Module\u003c\/h1\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1738-OB16EM12\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1738-OB16EM12 Digital Output Module\u003c\/strong\u003e, serves as the primary\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1738-OB16EM12 DC sourcing output module\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eutilized to execute 24 V DC load switching across ArmorPoint distributed I\/O platforms. Configured for point-level digital actuation in M12-connected field architectures, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1738-OB16EM12\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eprovides direct electrical switching of 16 sourcing outputs via a sealed 24 V DC backplane interface.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eThe 1738-OB16EM12 designation follows ArmorPoint Bulletin 1738 structure:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e1738: ArmorPoint I\/O platform identifier\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOB16: 16-channel output block configuration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEM12: M12 connectorized environmental module variant\u003cbr\u003eNo further functional sub-encoding is defined for channel behavior or electrical rating.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth class=\"last:pe-10\"\u003eParameter\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1738-OB16EM12\u003c\/td\u003e\n\u003c\/tr\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\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.11 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 deg C to +60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e24 V DC (PointBus supply)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Outputs\u003c\/td\u003e\n\u003ctd\u003e16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003e24 V DC sourcing (NPN)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Current per Output\u003c\/td\u003e\n\u003ctd\u003e0.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Module Current\u003c\/td\u003e\n\u003ctd\u003e4 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector Type\u003c\/td\u003e\n\u003ctd\u003eM12 quick-disconnect\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Rating\u003c\/td\u003e\n\u003ctd\u003eIP65 \/ IP66 \/ IP67 \/ IP69K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eBackplane Bus Communication and Output Deterministic Switching\u003c\/h3\u003e\n\u003cp\u003eWithin the ArmorPoint I\/O architecture, output state execution is synchronized through PointBus communication cycles. The module updates 16-channel output states using change-of-state (COS) signaling over the distributed backplane, with current allocation managed per channel load. I\/O density scaling is constrained by aggregate PointBus current budget (75 mA class system integration limit) and module grouping topology.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Can outputs be switched while the module is under load?\u003cbr\u003eA: Yes. Each channel supports live switching, but inductive load suppression must be implemented externally to prevent back-EMF coupling into the output driver stage.\u003c\/p\u003e\n\u003cp\u003eQ: What happens during RIUP (Removal and Insertion Under Power)?\u003cbr\u003eA: During RIUP, all output states are forced to a safe de-energized condition until module reinitialization and backplane synchronization are completed.\u003c\/p\u003e\n\u003cp\u003eQ: Is channel-to-channel electrical isolation implemented?\u003cbr\u003eA: Outputs share a common sourcing architecture; isolation is not provided per channel and external isolation must be implemented at load side if required.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eM12 connectors must be fully engaged to maintain IP69K sealing integrity across vibration and washdown conditions. Output wiring shall be routed separately from high-frequency switching conductors to minimize induced noise coupling. All inductive loads require external suppression (diode or RC snubber) at field terminals. Maintain correct 24 V DC supply polarity and verify PointBus current availability prior to module insertion. Shield continuity must be maintained at cabinet entry to prevent ground loop injection into output return paths.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43497688891482,"sku":"1738-OB16EM12","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1738-OB16EM12.jpg?v=1781507440","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1738-ob16em12-digital-output-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}