{"product_id":"allen-bradley-1746-ow16-c-slc-500-relay-output-module","title":"Allen-Bradley 1746-OW16\/C SLC 500 Relay Output Module","description":"\u003ch1\u003eAllen-Bradley 1746-OW16\/C SLC 500 Relay Output Module\u003c\/h1\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1746-OW16\/C\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1746-OW16\/C\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003erelay output module, serves as a 16-point electromechanical switching interface for AC\/DC load control within SLC 500 chassis-based I\/O architectures. The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1746-OW16\/C\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(\u003cstrong\u003e1746-OW16\/C\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003erelay output module) provides discrete contact actuation through backplane-synchronized control of mechanical relay outputs across SLC 500 systems.\u003c\/p\u003e\n\u003cp\u003eThe module executes controller-driven output state transitions via internal relay coils, providing galvanically isolated hard-contact switching between field loads and controller logic. Output grouping is implemented as 8 points per common, enabling segmented load distribution across dual relay banks.\u003c\/p\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\u003e1746-OW16\/C\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\u003e3 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e127 mm x 51 mm x 152 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-10 deg C to +55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channels\u003c\/td\u003e\n\u003ctd\u003e16 relay outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eMechanical relay (AC\/DC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePoints per Common\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoad Current\u003c\/td\u003e\n\u003ctd\u003eUp to 2 A per point (application dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003eOptical isolation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eRelay output module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSLC 500 Backplane Control and Relay Contact Switching Behavior\u003c\/h3\u003e\n\u003cp\u003eThe 1746-OW16\/C implements backplane-driven relay coil excitation, where output image data from the SLC 500 processor is translated into mechanical contact actuation. Each relay channel provides hard galvanic separation between field wiring and controller logic domain through electromechanical switching.\u003c\/p\u003e\n\u003cp\u003eChannel grouping into 8-point commons defines current return segmentation, limiting shared load distribution across relay banks. Switching latency is determined by mechanical actuation time of the relay elements, independent of backplane scan timing once coil energization is issued.\u003c\/p\u003e\n\u003cp\u003eThe optical isolation stage decouples internal logic from field-side switching transients, reducing susceptibility to external voltage disturbances during contact transitions.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Can the 1746-OW16\/C be hot-swapped in an energized SLC 500 rack?\u003cbr\u003eA: No. Chassis power must be removed prior to module insertion or removal to avoid backplane disruption and relay state uncertainty.\u003c\/p\u003e\n\u003cp\u003eQ: What determines switching speed in this module?\u003cbr\u003eA: Switching speed is governed by mechanical relay actuation time rather than electronic propagation delay, resulting in slower response than solid-state modules.\u003c\/p\u003e\n\u003cp\u003eQ: Are AC and DC loads supported simultaneously?\u003cbr\u003eA: Yes. Each relay output supports AC or DC loads within its rated current limits, subject to contact wear and arc suppression conditions.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the 1746-OW16\/C into a compatible SLC 500 chassis slot ensuring full engagement with the backplane connector. Power isolation is required prior to installation or removal.\u003c\/p\u003e\n\u003cp\u003eField wiring must be connected according to 8-point common grouping, ensuring correct load return paths per relay bank. Inductive loads such as solenoids or contactors require external suppression elements (flyback diode or RC snubber) to limit contact arcing.\u003c\/p\u003e\n\u003cp\u003eMaintain separation between relay output wiring and low-level signal conductors to reduce electromagnetic coupling. Verify chassis grounding continuity before system energization.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43537263624282,"sku":"1746-OW16\/C","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1746-OW161.jpg?v=1777529133","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1746-ow16-c-slc-500-relay-output-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}