{"product_id":"allen-bradley-1746-a13-b-slc-500-i-o-chassis","title":"Allen-Bradley 1746-A13\/B SLC 500 I\/O Chassis","description":"\u003ch1\u003eAllen-Bradley 1746-A13\/B SLC 500 I\/O Chassis\u003c\/h1\u003e\n\u003cp\u003eConfigured for mechanical hosting and backplane electrical distribution in SLC 500 modular controller architectures, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1746-A13\/B\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(\u003cstrong\u003e1746-A13\/B\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePLC chassis) provides direct physical\/electrical execution for module slotting, signal routing, and power rail distribution across SLC 500 I\/O subsystems.\u003c\/p\u003e\n\u003cp\u003eThe chassis implements a shared backplane structure for 5 VDC and 24 VDC distribution, enabling synchronized module communication across 13 slot positions with deterministic scan alignment under SLC 500 controller control logic.\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-A13\/B\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\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eApprox. 572 mm width\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eBackplane: 5 VDC 5 A max \/ 24 VDC 1.6 A max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlots\u003c\/td\u003e\n\u003ctd\u003e13 module slots\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003ePanel or rack mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChassis Type\u003c\/td\u003e\n\u003ctd\u003eSLC 500 I\/O chassis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSLC 500 Backplane Bus Distribution Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe 1746-A13\/B chassis supports SLC 500 backplane bus communication across all installed modules, providing synchronized power and signal distribution through a shared electrical plane. The backplane architecture manages slot addressing, scan sequencing, and module enumeration through fixed electrical indexing.\u003c\/p\u003e\n\u003cp\u003eMulti-module configurations distribute 5 VDC logic power and 24 VDC field power rails across the chassis, requiring compliance with total backplane loading limits to maintain stable module operation under full slot utilization conditions.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Can the 1746-A13\/B chassis operate with partially populated slots?\u003cbr\u003eA: Yes. Unused slots remain electrically inactive but still part of the backplane structure. Addressing is determined by physical slot position.\u003c\/p\u003e\n\u003cp\u003eQ: What happens if backplane current limits are exceeded?\u003cbr\u003eA: Exceeding 5 VDC or 24 VDC backplane limits can cause voltage drop across the bus, leading to module reset or communication faults.\u003c\/p\u003e\n\u003cp\u003eQ: Is the chassis compatible with mixed module types?\u003cbr\u003eA: Yes. It supports SLC 500 input, output, communication, and specialty modules, provided total backplane power and slot addressing constraints are respected.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eMount the chassis on a grounded steel panel using designated mounting points. Ensure flat mechanical contact to avoid chassis torsion that may affect backplane connector alignment across 13 slots.\u003c\/p\u003e\n\u003cp\u003eMaintain separation between backplane interconnect wiring and high-noise conductors. Shielded routing is required for communication modules installed adjacent to switching loads.\u003c\/p\u003e\n\u003cp\u003eTorque all mounting fasteners uniformly to prevent chassis deformation. Verify protective earth continuity between chassis frame and cabinet grounding bar before module installation.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43497781067866,"sku":"1746-A13\/B","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1746-A131.jpg?v=1777528896","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1746-a13-b-slc-500-i-o-chassis","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}