{"product_id":"modicon-pc-e984-685-984-685-slot-mount-controller-cpu-ps","title":"Contrôleur CPU\/PS à montage sur slot MODICON PC-E984-685 (984-685)","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eModicon PC-E984-685 (984-685)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a high-performance, slot-mount Programmable Logic Controller (PLC) that integrates a Central Processing Unit (CPU) and a Power Supply (PS) into a single module. Part of the legacy\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eModicon 984\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eseries, the E984-685 is engineered for mid-to-large scale industrial automation tasks requiring robust logic processing and high-speed I\/O communication. This \"All-in-One\" architecture simplifies system planning by providing internal power for the CPU and the backplane while supporting the standard Modicon 800-Series I\/O. Its dual AC\/DC capability (115\/220 VAC input and 24 VDC output) makes it a versatile solution for heritage systems in manufacturing and process control.\u003c\/p\u003e\n\u003ch3\u003eTechnical Configuration (Deep Dive)\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ePC-E984-685\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003earchitecture is designed for deterministic execution and high-density memory management.\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIntegrated Power Supply:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module features a built-in power supply that accepts\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e115 VAC or 220 VAC\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(jumper\/switch selectable). It provides the necessary\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e24 VDC\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand logic voltages required to power the CPU and up to a specific number of I\/O modules on the local rack.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMemory Management:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEquipped with high-capacity user memory for logic (Relay Ladder Logic) and state RAM. It supports battery-backed CMOS RAM to ensure program retention during power loss.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDual Communication Ports:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eTypically features two\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eModbus (RS-232\/RS-485)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eports, enabling simultaneous connection to a programming terminal (like a P190 or PC-based software) and a human-machine interface (HMI) or SCADA system.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eExecutive Firmware:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe controller utilizes a swappable \"Executive\" cartridge or FLASH-based firmware that defines the instruction set and communication protocols, allowing for field updates to enhance functionality.\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\u003eParameter\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\u003e\u003cstrong\u003ePC-E984-685\u003c\/strong\u003e\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\u003e\u003cstrong\u003eModicon (Schneider Electric)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eUSA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInput Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e115 \/ 220 VAC (47 - 63 Hz)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInternal Output\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e24 VDC (For local I\/O and Logic)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eLogic Memory\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e8K to 16K (Model dependent)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eI\/O Capacity\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eUp to 1024 Discrete \/ 1024 Register\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temp\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0 to 60 deg C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e984-Series Slot Mount\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBattery Backup\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eLithium battery for CMOS RAM retention\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eTechnical FAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I clear a \"CPU Stopped\" error code on the E984-685?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA stopped CPU is often indicated by specific LED patterns (e.g., \"Ready\" LED off). Check the error codes using Modsoft or Concept software. Common causes include a depleted battery, memory parity errors, or an I\/O mismatch in the configuration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use the 24 VDC output to power external field devices?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhile the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ePC-E984-685\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eprovides 24 VDC for internal rack logic and local 800-series modules, it is standard engineering practice to use a separate, dedicated external power supply for heavy field loads (solenoids, contactors) to prevent electrical noise from resetting the CPU.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the function of the \"Config Mode\" toggle switch?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe toggle switch allows the user to protect the memory (Run\/Protect) or place the CPU into a configuration state for Modbus port address assignment and baud rate setup.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eEngineering \u0026amp; Installation Guide\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eVoltage Selection Jumper:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eCRITICAL:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBefore applying power, verify the internal voltage selection jumper is set correctly for your local mains (115 VAC vs. 220 VAC). Applying 220 VAC to a unit set for 115 VAC will result in immediate hardware failure of the power supply stage.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eGrounding and Noise Abatement:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEnsure the PLC rack is grounded via a heavy-duty copper braid to a central \"Star\" ground point. Use shielded twisted-pair cables for Modbus communications to prevent electromagnetic interference (EMI) from high-power motor drives from corrupting the data stream.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eBattery Maintenance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eReplace the lithium battery every 2-3 years while the unit is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003epowered on\u003c\/strong\u003e. If the battery is removed while the unit is powered off, the user program and configuration will be lost.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ePC-E984-685\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis distinguished by its\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eInstruction Set Stability\u003c\/strong\u003e. Unlike modern controllers that require frequent firmware patches, the 984-685 offers a \"frozen\" industrial logic environment that is highly predictable. Its integrated power supply reduces the physical footprint of the PLC system, making it an ideal choice for \"Retrofit-in-Place\" projects where enclosure space is limited but high-speed Modicon logic is still required.\u003c\/p\u003e","brand":"Schneider Electric","offers":[{"title":"Default Title","offer_id":52695205937515,"sku":"MODICON PC-E984-685","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/modicon-pc-e984-685-model-685e-cpu-module-sj0s4kwb3qd_2b2d3c30-5f5c-4a2d-8ad5-07d46c4a0687.jpg?v=1766130685","url":"https:\/\/www.plcprotech.com\/fr\/products\/modicon-pc-e984-685-984-685-slot-mount-controller-cpu-ps","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}