{"product_id":"allen-bradley-1771-cfmk-plc-5-configurable-flowmeter-module","title":"Allen-Bradley 1771-CFMK PLC-5 Configurable Flowmeter Module","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong style=\"color: #0056b3;\"\u003e1771-CFMK\u003c\/strong\u003e is an Allen-Bradley configurable flowmeter module engineered for high-accuracy rate calculation and pulse totalizing within PLC-5 and related 1771 I\/O chassis systems. Occupying a single I\/O slot with a unit weight of approximately 0.9 kg (2.0 lbs), this intelligent block-transfer module bridges field flow sensing devices directly with Allen-Bradley PLC-2, PLC-3, PLC-5, and PLC-5\/250 processing architectures. Flexible in operation, the 1771-CFMK can function natively as a CFM module or serve as a functional replacement for legacy QRC and QRD modules. Operating on a 1 Amp backplane current draw with peak heat dissipation of 13 Watts, it delivers precise measurement capabilities for demanding process control tasks across power, chemical, and oil and gas industries.\u003c\/p\u003e\n\n\u003ch2\u003eCore Technical Advantages\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlexible Multi-Signal Input Handling:\u003c\/strong\u003e Features 4 input channels that support magnetic pickup flowmeters (50 mV to 200 VAC), 4–40 VDC TTL-compatible pulse signals, and Bently Nevada 3300 proximity probe inputs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Dual-Function Modes:\u003c\/strong\u003e Each channel can be individually configured for flowmeter pulse input or high-speed gate control input to handle rate calculations or totalizing tasks.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBroad Legacy Processor Compatibility:\u003c\/strong\u003e Seamlessly integrates with classic Allen-Bradley PLC-2, PLC-3, PLC-5, and PLC-5\/250 series processors with block-transfer capabilities.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n  \u003cthead\u003e\n    \u003ctr style=\"background-color: #f2f2f2;\"\u003e\n      \u003cth style=\"border: 1px solid #dddddd; padding: 8px; text-align: left;\"\u003eParameter\u003c\/th\u003e\n      \u003cth style=\"border: 1px solid #dddddd; padding: 8px; text-align: left;\"\u003eSpecification Details\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eBrand \u0026amp; Manufacturer\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003eAllen-Bradley \/ Rockwell Automation\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eProduct Model Designation\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e1771-CFMK\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eModule Type\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003eConfigurable Flowmeter Module\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eProduct Series\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003ePLC-5 System (1771 I\/O)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eChannel Configuration\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e4 Inputs \/ 4 Outputs\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eApproximate Unit Weight\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e0.9 kg (2.0 lbs)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eBackplane Current Draw\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e1.0 Amp maximum at 5 VDC\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eHeat \u0026amp; Thermal Dissipation\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e2 to 13 Watts (6.8 to 54.2 BTU\/hr)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eOutput Leakage Current\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u0026lt;300 µA at 40 VDC\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eOperating Temperature Scope\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e0°C to +60°C (32°F to 140°F)\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eIndustrial Applications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOil \u0026amp; Gas Pipeline Metering:\u003c\/strong\u003e Calculates continuous flow rates and volume totals from magnetic pickup turbine meters on fluid transport lines.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFood \u0026amp; Beverage Batch Processing:\u003c\/strong\u003e Manages high-speed ingredient dispensing and liquid recipe metering using DC pulse flow sensors.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTurbine \u0026amp; Rotating Equipment Monitoring:\u003c\/strong\u003e Processes proximity probe inputs from Bently Nevada systems for rotational speed and flow tracking.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Generation Plant Management:\u003c\/strong\u003e Monitors high-pressure steam and boiler feed-water totals inside utility control systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWiring \u0026amp; Installation\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1771 Chassis Slot Insertion:\u003c\/strong\u003e Align the lightweight 0.9 kg module with keying bands and slide it firmly into the target slot on the 1771 I\/O rack until securely latched to the backplane.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eField Signal Wiring:\u003c\/strong\u003e Connect pulse, magnetic pickup, or proximity sensor wires to the corresponding terminal arm, utilizing shielded twisted pairs to protect low-level signal paths.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBlock Transfer Programming:\u003c\/strong\u003e Configure the PLC program using block-transfer read (BTR) and block-transfer write (BTW) instructions to transfer operational setup data and read flow values.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Isolation \u0026amp; Safety:\u003c\/strong\u003e Disconnect main chassis power before installing or removing the 1771-CFMK card to prevent backplane bus transients.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eEngineering Advantages\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLegacy Replacement Flexibility:\u003c\/strong\u003e Directly replaces legacy QRC and QRD modules, reducing redesign downtime during system revamps.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Output On-State Drop:\u003c\/strong\u003e Delivers minimal voltage drop (0.6 Ohms × current) across output circuits for reliable control interfacing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSingle-Slot Efficiency:\u003c\/strong\u003e Packs 4 flexible input channels and 4 solid-state outputs into a single-slot 1771 footprint to optimize rack space and panel weight distribution.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical FAQs\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ1: Which sensor types work with the 1771-CFMK inputs?\u003c\/strong\u003e\u003cbr\u003e\nA1: Magnetic pickups (50mV–200VAC), 4–40VDC pulses, and Bently Nevada 3300 proximity probes.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ2: Can the 1771-CFMK replace older QRC\/QRD modules?\u003c\/strong\u003e\u003cbr\u003e\nA2: Yes. It can operate as a CFM module or as a direct replacement for QRC\/QRD cards.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ3: How does the CPU read flow data from this module?\u003c\/strong\u003e\u003cbr\u003e\nA3: The host PLC uses block-transfer read (BTR) and write (BTW) instructions over the backplane.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52789984788612,"sku":"1771-CFMK","price":154.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/7454\/7844\/files\/1771-CFMK-2.jpg?v=1789562225","url":"https:\/\/www.etowonauto.com\/products\/allen-bradley-1771-cfmk-plc-5-configurable-flowmeter-module","provider":"Etowon Auto","version":"1.0","type":"link"}