{"product_id":"schneider-electric-pc-e984-381-modicon-984-cpu-module","title":"Schneider Electric PC-E984-381 Modicon 984 CPU Module","description":"\u003cp\u003eThe \u003cstrong\u003eSchneider Electric PC-E984-381\u003c\/strong\u003e (also designated as Model 381E) is a programmable logic controller CPU module designed for mid-range automation within the Modicon 984 platform. Powered by a 16-bit processor, the module features 16K words of user logic memory alongside 1,920 state registers, providing a total memory capacity of 18K words for program execution and data handling. The \u003cstrong\u003ePC-E984-381\u003c\/strong\u003e integrates an internal power supply and dual Modbus serial ports into a single modular assembly designed to mount into Modicon 800 series housing structures.\u003c\/p\u003e\n\u003ch3\u003eIntegrated Power Supply and Hardware Architecture\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003ePC-E984-381\u003c\/strong\u003e integrates a dual-input power supply section directly on the module assembly. It accepts broad AC line voltages ranging from 97 VAC to 276 VAC (47–63 Hz) as well as a 24 VDC auxiliary or continuous power input. Primary AC power is toggled via a front-panel rocker switch. The unit communicates across a shielded rack backplane designed to mitigate electromagnetic interference (EMI) and radio frequency interference (RFI) in factory floor environments. Front-panel LED status indicators provide immediate feedback for Power OK, Ready, Run mode, Battery Low, and Modbus port activity.\u003c\/p\u003e\n\u003ch3\u003eSerial Communication and I\/O Capacity\u003c\/h3\u003e\n\u003cp\u003eEquipped with two dedicated Modbus serial communication ports, the \u003cstrong\u003ePC-E984-381\u003c\/strong\u003e supports simultaneous networking and local maintenance connections. One port can remain permanently linked to host computers, HMIs, or distributed control networks while the secondary port serves programming terminals or diagnostic tools. The CPU handles up to 512 discrete local I\/O points and 512 total I\/O bits across compatible Modicon 800 series I\/O housings.\u003c\/p\u003e\n\u003ch3\u003eTechnical 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\u003ePC-E984-381 (Model 381E)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSchneider Electric \/ Modicon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003ePLC CPU \u0026amp; Power Supply Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eArchitecture\u003c\/td\u003e\n\u003ctd\u003e16-bit CPU (24-bit memory architecture)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLogic Execution Speed\u003c\/td\u003e\n\u003ctd\u003e2.5 ms per 1,000 nodes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUser Logic Memory\u003c\/td\u003e\n\u003ctd\u003e16K words\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eState Registers\u003c\/td\u003e\n\u003ctd\u003e1,920 registers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Memory\u003c\/td\u003e\n\u003ctd\u003e18K words\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLocal I\/O Capacity\u003c\/td\u003e\n\u003ctd\u003e512 discrete I\/O points\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage Options\u003c\/td\u003e\n\u003ctd\u003e97–276 VAC (47–63 Hz) \/ 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSerial Interfaces\u003c\/td\u003e\n\u003ctd\u003e2 x Modbus ports\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Compatibility\u003c\/td\u003e\n\u003ctd\u003eModicon 984 \/ 800 Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e2.80 lbs (approx. 1.27 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eFunctional Features and Logic Processing\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003ePC-E984-381\u003c\/strong\u003e executes standard Modicon 984 instruction sets at a nominal processing speed of 2.5 ms per thousand nodes of user logic. Internal CMOS RAM retains application logic and dynamic registers via battery backup. Executive system firmware resides in non-volatile PROM memory, ensuring system recovery following extended power outages. An onboard time-of-day clock is standard for event logging and time-stamped control routines.\u003c\/p\u003e\n\u003cp\u003eFrequently Asked Questions\u003c\/p\u003e\n\u003cp\u003eQ: How do the two Modbus ports function on the PC-E984-381?A: The dual Modbus ports allow the controller to maintain continuous communication on a master Modbus network via one port while leaving the second port open for local programming panels or host device connections.\u003c\/p\u003e\n\u003cp\u003eQ: What power sources can be used to run the PC-E984-381 CPU module?A: The module accepts a wide AC input range from 97 VAC to 276 VAC (47 to 63 Hz) switched via a front panel rocker, and it can also run continuously on 24 VDC as an auxiliary or sole power source.\u003c\/p\u003e\n\u003cp\u003eQ: What housing and I\/O platform is compatible with this model?A: The PC-E984-381 is designed\u003c\/p\u003e","brand":"Schneider Electric","offers":[{"title":"Default Title","offer_id":67148348948595,"sku":"PC-E984-381","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/PC-E984-3812_Cocoai.jpg?v=1794205470","url":"https:\/\/www.dcssupplier.com\/products\/schneider-electric-pc-e984-381-modicon-984-cpu-module","provider":"DcsSupplier Limited","version":"1.0","type":"link"}