{"product_id":"pi3381-triconex-automate-pulse-input-module","title":"PI3381 Triconex Automate Pulse Input Module","description":"\u003ch2\u003eTriconex PI3381 Pulse Input Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for fault-tolerant frequency processing in Triconex safety instrumented networks, the \u003cstrong\u003eTriconex PI3381\u003c\/strong\u003e (\u003cstrong\u003ePI3381\u003c\/strong\u003e Pulse Input Module) provides direct physical\/electrical execution. The module conditions voltage transitions originating from external magnetic pickups, active sensors, or open-collector circuits across 6 isolated input channels. Operating within an input frequency band spanning 0.5 Hz to 32 kHz, the internal hardware converts raw incoming pulses into digital velocity and rate records, outputting 24-bit resolution metrics directly to the centralized controller backplane.\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\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\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\u003ePI3381 (3381 variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eTriconex\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e2.2 x 12.4 x 12.6 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to +70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e24 VDC nominal loop distribution\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e6 isolated input channels sharing common ground\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Range\u003c\/td\u003e\n\u003ctd\u003e0.5 Hz - 32 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e24 bits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Accuracy\u003c\/td\u003e\n\u003ctd\u003e+\/- 0.01% at 2000 - 32000 Hz \/ +\/- 0.1% at 0.5 - 2000 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Input Voltage\u003c\/td\u003e\n\u003ctd\u003e+\/- 33 VDC maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Barrier\u003c\/td\u003e\n\u003ctd\u003e500 VDC functional-to-protective earth \/ 800 VDC functional-to-functional\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Certification\u003c\/td\u003e\n\u003ctd\u003eIEC 61508 SIL 3, TÜV certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eTriple Modular Redundancy (TMR) 2oo3 Architecture\u003c\/h3\u003e\n\u003cp\u003eThe hardware utilizes three fully isolated sensor processing paths running a triple modular redundancy (TMR) 2oo3 architecture to secure continuous data availability. Incoming pulse transitions travel to each distinct sub-circuit where a mid-value selection algorithm identifies and isolates measurement anomalies before voting. Integrated diagnostic circuits execute concurrent checks to trace field signal loss, open-circuit variations, and channel degradation, ensuring the execution of a fail-safe state under overspeed conditions.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What minimum voltage levels are required by the PI3381 input circuits to trigger a valid pulse event?\u003c\/p\u003e\n\u003cp\u003eA: For differential configurations, the circuit requires a minimum input voltage of 500 mV P-P within the 2 to 32000 Hz frequency range, increasing to 1 V P-P from 0.5 to 2 Hz. For single-ended configurations, requirements stand at 1 V P-P for 2 to 32000 Hz and 2 V P-P for 0.5 to 2 Hz.\u003c\/p\u003e\n\u003cp\u003eQ: How does the live online replacement or hot-swapping sequence affect active sensor processing loops?\u003c\/p\u003e\n\u003cp\u003eA: The slot configuration permits live hot-swapping without disabling the primary safety rack or stopping system loops. Insertion of the replacement module invokes a brief startup routine where the module downloads operational registers, synchronizes its firmware flash image, and begins contributing valid voted velocity data alongside the redundant pairs.\u003c\/p\u003e\n\u003cp\u003eQ: What parameters control the acceleration measurement boundaries of the module input channels?\u003c\/p\u003e\n\u003cp\u003eA: The input registers handle maximum signal changes up to a slew rate of 4000 Hz\/sec or 4000 RPM\/sec assuming a standard 60-gear-tooth input configuration. The module supports adjustable gear profiles ranging from 1 to 255 teeth per revolution.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eInsert the module into the active chassis guide rails, locking the module faceplate screws securely to preserve backplane connection alignment.\u003c\/li\u003e\n\u003cli\u003eRoute magnetic pickup and active sensor signal cables through distinct, grounded steel conduit runs separated from high-voltage motor or actuator lines.\u003c\/li\u003e\n\u003cli\u003eTerminate signal shields at the dedicated chassis earth reference point to block electromagnetic interference from corrupting the 24-bit digital pulse samples.\u003c\/li\u003e\n\u003cli\u003eVerify that signal pulse widths match the minimum required duty cycle window of 20-80% or stay greater than or equal to 10 microseconds.\u003c\/li\u003e\n\u003cli\u003eInspect the surrounding enclosure panels regularly to verify that natural convection cooling maintains environmental temperatures below the 70 deg C ceiling limit.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Triconex","offers":[{"title":"Default Title","offer_id":43712194674778,"sku":"PI3381","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/142._1e54947d-13a3-45d8-a2ff-d616167117c2.jpg?v=1784772891","url":"https:\/\/www.spareoil.com\/products\/pi3381-triconex-automate-pulse-input-module","provider":"SpareOil Automation","version":"1.0","type":"link"}