{"product_id":"1747-bsn-allen-bradley-backup-scanner-module","title":"1747-BSN | Allen-Bradley | Backup Scanner Module","description":"\u003ch2\u003eAllen‑Bradley 1747‑BSN Backup Scanner Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen‑Bradley 1747‑BSN\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1747‑BSN\u003c\/strong\u003e backup scanner module, operates as a dedicated hardware component for redundant Remote I\/O and DH+\/DH‑485 communication within SLC 500 backplane networks.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003e1747‑BSN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eAllen‑Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e5 kg (shipping)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating Temp\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower Consumption\u003c\/th\u003e\n\u003ctd\u003e800 mA at 5 VDC (backplane load)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eBackup Scanner Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSeries\u003c\/th\u003e\n\u003ctd\u003eSLC 500 (1746\/1747)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSupported Networks\u003c\/th\u003e\n\u003ctd\u003eRemote I\/O, DH+, RS‑232, DH‑485 (per complementary BSN pair)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBackplane Interface\u003c\/th\u003e\n\u003ctd\u003e1746 SLC backplane\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRedundancy Mode\u003c\/th\u003e\n\u003ctd\u003eComplementary BSN module pair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Bus Communication Velocity Licenses\u003c\/h3\u003e\n\u003cp\u003eThe 1747‑BSN participates in deterministic backplane communication used across Allen‑Bradley SLC 500 architectures. Scanner redundancy relies on synchronized token‑passing intervals for DH+ and Remote I\/O networks. I\/O density scaling is maintained by mapping each BSN pair to identical network segments, preventing channel skew during switchover. Firmware flash compatibility resides entirely within the SLC processor; the BSN contains no user‑upgradeable firmware and provides fixed electrical behavior across controller revisions.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the 1747‑BSN be hot‑swapped? A: No. The module must be inserted or removed only when the chassis is de‑energized to avoid backplane communication faults.\u003c\/p\u003e\n\u003cp\u003eQ: How many networks can a BSN pair back up? A: One Remote I\/O or DH+ network and one RS‑232\/DH‑485 communication channel per complementary BSN module pair.\u003c\/p\u003e\n\u003cp\u003eQ: Does the BSN require firmware updates? A: No. All configuration and firmware handling occur in the SLC processor; the BSN is hardware‑fixed.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInstall BSN modules in complementary pairs to maintain redundancy.\u003c\/li\u003e\n\u003cli\u003eEnsure proper seating in the 1746 backplane to avoid bent pins or intermittent communication.\u003c\/li\u003e\n\u003cli\u003eRoute DH+, DH‑485, and Remote I\/O cabling separately from high‑voltage conductors to reduce noise coupling.\u003c\/li\u003e\n\u003cli\u003eVerify backplane power capacity when multiple communication modules coexist.\u003c\/li\u003e\n\u003cli\u003eMaintain non‑condensing humidity conditions to prevent terminal oxidation.\u003c\/li\u003e\n\u003cli\u003eLabel network segments clearly to support maintenance and fault tracing.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":48225423032510,"sku":"1747-BSN","price":450.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/allen-bradley-1747-l532-slc-5-03-16k-controller-5hbsgptfbxw.png?v=1759047065","url":"https:\/\/www.autooiltech.com\/ar\/products\/1747-bsn-allen-bradley-backup-scanner-module","provider":"AutoOilTech Limited","version":"1.0","type":"link"}