{"product_id":"allen-bradley-1756-hsc-b-high-speed-counter-module","title":"Allen-Bradley 1756-HSC\/B High-Speed Counter Module","description":"\u003ch1 class=\"PDq2pG_selectionAnchorContainer\"\u003eAllen-Bradley 1756-HSC\/B High-Speed Counter Module\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp\u003eConfigured for high-frequency pulse acquisition and deterministic event sequencing in ControlLogix architectures, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1756-HSC\/B\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(\u003cstrong\u003e1756-HSC\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ehigh-speed counter module) provides direct electrical processing of encoder pulse trains and digital input transitions within a 1756 backplane environment. The module executes dual-channel counting and SOE time-stamping with sub-millisecond resolution across integrated ControlLogix task execution cycles.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eThe “\/B” suffix denotes a hardware revision level within the 1756-HSC product lifecycle. No functional segmentation or variant option mapping is published beyond revision control designation in available ControlLogix documentation.\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\u003e1756-HSC\/B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003eAllen-Bradley\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.44 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 deg C to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temp\u003c\/td\u003e\n\u003ctd\u003e-40 deg C to 85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eBackplane powered (ControlLogix chassis supply)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e2 high-speed inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channels\u003c\/td\u003e\n\u003ctd\u003e4 digital outputs (current sourcing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Input Frequency\u003c\/td\u003e\n\u003ctd\u003e1 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTime-Stamp Resolution\u003c\/td\u003e\n\u003ctd\u003eSub-millisecond (SOE event capture)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVibration Resistance\u003c\/td\u003e\n\u003ctd\u003eUp to 2 m\/s2, 500 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eControlLogix High-Speed Backplane Processing Behavior\u003c\/h3\u003e\n\u003cp\u003eThe 1756-HSC\/B operates as a deterministic edge-event acquisition node within the ControlLogix backplane bus. Input transitions from encoder signals and pulse trains are latched in hardware before being synchronized to the controller scan cycle.\u003c\/p\u003e\n\u003cp\u003eHigh-frequency counting is decoupled from PLC task execution through dedicated internal timing logic, allowing event capture up to 1 MHz without reliance on software polling loops. Output channels are mapped to programmable limit switch logic, enabling hardware-triggered state changes independent of controller scan latency.\u003c\/p\u003e\n\u003cp\u003eIn SOE mode, timestamping is derived from internal module clock alignment with backplane time reference, ensuring consistent event ordering across distributed I\/O modules.\u003c\/p\u003e\n\u003ch3\u003eFrequency and Encoder Signal Processing Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe module processes incremental encoder inputs and pulse trains using edge-detection circuitry optimized for fast transition capture. Input conditioning includes noise rejection logic tuned for industrial digital signal levels, reducing false triggering under high EMI conditions.\u003c\/p\u003e\n\u003cp\u003eCounter registers are updated in hardware logic blocks before being exposed to controller memory space via the ControlLogix communication interface.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1756-HSC\/B support hot insertion under RIUP conditions?\u003cbr\u003eA: Yes. The module supports RIUP insertion and removal under power within a configured ControlLogix chassis.\u003c\/p\u003e\n\u003cp\u003eQ: Are input channels independently configurable for frequency measurement and counting?\u003cbr\u003eA: Yes. Each of the two channels can be assigned independent counting or frequency measurement modes.\u003c\/p\u003e\n\u003cp\u003eQ: Does output switching depend on controller scan time?\u003cbr\u003eA: No. Output channels can operate under hardware-defined limit switch logic, independent of scan cycle timing.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInsert the module only into a compatible ControlLogix 1756 chassis slot with verified backplane seating. Ensure full connector engagement to maintain deterministic signal acquisition and output control integrity.\u003c\/p\u003e\n\u003cp\u003eRoute encoder and pulse signal wiring using shielded twisted pair conductors. Terminate shielding at a single chassis ground point to reduce common-mode noise coupling into high-speed input circuits.\u003c\/p\u003e\n\u003cp\u003eMaintain separation between high-frequency signal wiring and power conductors from drives or switching supplies. This reduces induced jitter on edge-detection inputs.\u003c\/p\u003e\n\u003cp\u003eVerify module configuration in Studio 5000 Logix Designer prior to enabling high-speed counter operation and SOE timestamping functions.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43585682112602,"sku":"1756-HSC\/B","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1756-HSCB2.jpg?v=1783062037","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1756-hsc-b-high-speed-counter-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}