{"product_id":"allen-bradley-1756-hsc-b-controllogix-high-speed-counter-module","title":"Allen-Bradley 1756-HSC\/B ControlLogix High-Speed Counter Module","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-HSC\/B\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a high-performance High-Speed Counter (HSC) module designed for the Allen-Bradley ControlLogix platform. This module is engineered for precision motion and counting applications that exceed the scanning capabilities of standard digital input modules. It is capable of processing rapid pulse streams from encoders, flow meters, and proximity sensors with extreme accuracy.\u003c\/p\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSeries B\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eversion of this module offers refined stability and is an essential component for applications requiring high-speed event detection, such as bottling lines, material handling, and turbine speed monitoring. By offloading the counting logic from the CPU to the module hardware, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-HSC\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eensures that pulses are never \"missed\" due to PLC scan time fluctuations.\u003c\/p\u003e\n\u003ch3\u003eTechnical Configuration\u003c\/h3\u003e\n\u003cp\u003eThe 1756-HSC provides robust I\/O capabilities tailored for industrial counting:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDual Counter Architecture:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFeatures two independent counters, allowing for the simultaneous monitoring of two different high-speed processes.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTriple Input Per Counter:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEach counter accepts three inputs (typically A, B, and Z\/Index signals), facilitating full quadrature encoder support for directional and position sensing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQuad Output Signals:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIncludes four physical outputs that can be configured to trigger based on specific count values (Preset\/Current Value), enabling real-time hardware-level responses.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Speed Response:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDesigned to handle frequencies up to\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1 MHz\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(in certain configurations), providing the resolution needed for high-speed manufacturing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePower Efficiency:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDraws only 300 mA from the 5.1V backplane and a negligible 3 mA from the 24V source, resulting in a low total backplane power footprint of 1.6 Watts.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eFeature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification Details\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1756-HSC (Series B)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAllen-Bradley (Rockwell Automation)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eProduct Line\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eControlLogix\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCounter Channels\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInputs per Counter\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3 (A, B, and Z)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOutputs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBackplane Current\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e300 mA @ 5.1V DC \/ 3 mA @ 24V DC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMax. Power Dissipation\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e5.6 Watts @ 60 °C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eThermal Dissipation\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e19.1 BTU\/hr\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0 to 60 °C (32 to 140 °F)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSlot Width\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1 Slot\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.23 kg (0.50 lbs)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003eTechnical FAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between Series A and Series B?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhile both series share the same core functional specs, Series B typically includes hardware revisions for improved component longevity and better resistance to electromagnetic interference (EMI). For most applications, Series B is preferred for its updated firmware compatibility and enhanced circuit protection.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan this module support a standard incremental encoder?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The three-input configuration per counter is specifically designed for incremental encoders. It supports X1, X2, and X4 quadrature decoding, as well as Up\/Down counting and Pulse\/Direction modes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the module require an external power supply for the inputs?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The 1756-HSC inputs and outputs require an external field power supply (typically 12\/24V DC). The backplane current listed is strictly for the module's internal logic and communication with the ControlLogix CPU.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eEngineering \u0026amp; Installation Guide\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWiring and Signal Integrity\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eHigh-speed counting is highly sensitive to electrical noise. To prevent \"ghost counts\":\u003c\/p\u003e\n\u003col class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eShielding:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUse high-quality shielded twisted-pair cables for all encoder connections. Connect the shield to a single ground point at the chassis.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCable Routing:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eNever route encoder cables in the same conduit or tray as high-voltage AC motor wires or VFD output cables.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTerminal Block:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEnsure the 1756-TBCH or 1756-TBSH (36-pin) removable terminal block is securely seated.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eModule Configuration in Studio 5000\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhen adding the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-HSC\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eto your I\/O tree:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFilter Selection:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eConfigure the input filters to match your expected pulse frequency. Setting a filter too low will \"smooth out\" legitimate high-speed pulses, while setting it too high may allow noise to be counted.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCounter Mode:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSelect between \"Counter\" (for totalizing) or \"Encoder\" (for positioning).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eStorage:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUse the \"Storage\" feature to capture the current count value on a specific transition of the 'Z' input for precise homing sequences.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eThermal Management\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 1756-HSC dissipates up to 5.6 Watts. Ensure the ControlLogix chassis is mounted in a well-ventilated enclosure. If the cabinet's internal temperature approaches 60 °C, consider utilizing forced-air cooling to prevent thermal derating of the counting precision.\u003c\/p\u003e\n\u003ch3\u003e\u003c\/h3\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52695190569323,"sku":"1756-HSC\/B","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/allen-bradley-1756-hsc-b-hsc-module-ra4uewbbisd_8c782b85-0ecf-4a79-8a3b-67662f5047df.jpg?v=1766114611","url":"https:\/\/www.plcprotech.com\/products\/allen-bradley-1756-hsc-b-controllogix-high-speed-counter-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}