{"product_id":"3-cpu3-edwards-est-central-processing-unit-module-for-est3-fire-alarm-systems","title":"3-CPU3 | Edwards EST Central Processing Unit Module for EST3 Fire Alarm Systems","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp\u003eThe Edwards EST 3-CPU3 is a central processing unit module designed for EST3 life safety and fire alarm systems. It supervises all local rail modules, manages inter-module communications, and provides the network interface for system-wide data exchange. With integrated non-volatile memory and advanced diagnostic features, the 3-CPU3 ensures reliable system control and coordination.\u003c\/p\u003e\n\u003cp class=\"\"\u003e \u003c\/p\u003e\n\u003cp class=\"\"\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications \u003c\/h4\u003e\n\u003ctable style=\"width: 100%; height: 460.657px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.6952%; height: 19.5938px;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.9921%; height: 19.5938px;\"\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.6952%; height: 19.5938px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.9921%; height: 19.5938px;\"\u003eEdwards \/ EST\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.6952%; height: 19.5938px;\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.9921%; height: 19.5938px;\"\u003ePLCs\/Machine Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.6952%; height: 19.5938px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.9921%; height: 19.5938px;\"\u003e3-CPU3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.6952%; height: 19.5938px;\"\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.9921%; height: 19.5938px;\"\u003ePC Board PLC\/Add-On Board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.6952%; height: 19.5938px;\"\u003e\u003cstrong\u003eProcessor Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.9921%; height: 19.5938px;\"\u003e16-bit CPU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.6952%; height: 19.5938px;\"\u003e\u003cstrong\u003eMemory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.9921%; height: 19.5938px;\"\u003eNon-volatile, 1,000 event history storage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.6952%; height: 19.5938px;\"\u003e\u003cstrong\u003eCommunication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.9921%; height: 19.5938px;\"\u003eRS-485 (network), RS-232 (maintenance\/expansion)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 26.6952%; height: 39.1875px;\"\u003e\u003cstrong\u003eRelays\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.9921%; height: 39.1875px;\"\u003e3 × Form-C relays, 30 VDC @ 1 A (alarm, supervisory, trouble)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.6952%; height: 19.5938px;\"\u003e\u003cstrong\u003eAudio Support\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.9921%; height: 19.5938px;\"\u003e8-channel digital audio subsystem command\/control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.6952%; height: 19.5938px;\"\u003e\u003cstrong\u003eEvent Stamping\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.9921%; height: 19.5938px;\"\u003eIntegrated calendar\/clock with leap-year adjustment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 26.6952%; height: 39.1875px;\"\u003e\u003cstrong\u003eVoltage Requirement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.9921%; height: 39.1875px;\"\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.6952%; height: 19.5938px;\"\u003e\u003cstrong\u003eCurrent Draw\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.9921%; height: 19.5938px;\"\u003e145 mA standby \/ 155 mA alarm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.6952%; height: 19.5938px;\"\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.9921%; height: 19.5938px;\"\u003eOccupies first two slots of 3-CHAS7 rail chassis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.6952%; height: 19.5938px;\"\u003e\u003cstrong\u003eIndicators\/Functions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.9921%; height: 19.5938px;\"\u003eGround fault detection, watchdog supervision\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 26.6952%; height: 39.1875px;\"\u003e\u003cstrong\u003eConnections\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.9921%; height: 39.1875px;\"\u003ePlug-in connectors, power-limited and transient protected\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.6952%; height: 19.5938px;\"\u003e\u003cstrong\u003eOperating Temp\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.9921%; height: 19.5938px;\"\u003e32°F to 120°F (0°C to 49°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.6952%; height: 19.5938px;\"\u003e\u003cstrong\u003eHumidity Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.9921%; height: 19.5938px;\"\u003eUp to 93% RH, non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 10px;\"\u003e\n\u003ctd style=\"width: 26.6952%; height: 10px;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.9921%; height: 10px;\"\u003eStandard rail-mounted CPU module size\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.6952%; height: 19.5938px;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.9921%; height: 19.5938px;\"\u003e1.37 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eInformation About \u003cspan\u003e3-CPU3\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003eThe 3-CPU3 is part of the Edwards EST3 modular fire alarm and life safety system. Occupying the first two slots of the 3-CHAS7 chassis, it serves as the master controller for local modules and as the communication hub for networked panels. The CPU automatically learns the configuration of installed modules, downloads operating parameters, and supports firmware upgrades without hardware replacement. It features RS-485 and RS-232 communication options, multiplexed audio support, and Form-C relays for alarm, supervisory, and trouble signaling. With watchdog monitoring, non-volatile memory, and built-in time\/date event stamping, the 3-CPU3 provides both system intelligence and operational resilience.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCentral System Processor: Controls and supervises all modules within the EST3 chassis.\u003c\/li\u003e\n\u003cli\u003eAutomatic Module Learning: Detects and configures rail modules at startup.\u003c\/li\u003e\n\u003cli\u003eIntegrated Memory: Non-volatile storage with support for 1,000 history events.\u003c\/li\u003e\n\u003cli\u003eMultiple Communication Options: RS-485 for network, RS-232 for local connections.\u003c\/li\u003e\n\u003cli\u003eRelay Outputs: Three Form-C relays for alarm, supervisory, and trouble.\u003c\/li\u003e\n\u003cli\u003eWatchdog and Diagnostics: Monitors hardware and software faults for enhanced reliability.\u003c\/li\u003e\n\u003cli\u003eAudio Control Support: Provides command and control for 8-channel digital audio subsystems.\u003c\/li\u003e\n\u003cli\u003eFirmware Upgradable: Software and firmware updates loaded directly through the CPU.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 3-CPU3 provides the processing intelligence and communication backbone essential for EST3 networked fire alarm and life safety systems.\u003c\/p\u003e","brand":"Edwards Signaling","offers":[{"title":"Default Title","offer_id":49105215750400,"sku":"3-CPU3","price":1615.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0388\/5331\/2557\/files\/s-l1600_e5f30318-a40d-412b-a11e-71e88f2da8f9.webp?v=1785542705","url":"https:\/\/alotechparts.com\/products\/3-cpu3-edwards-est-central-processing-unit-module-for-est3-fire-alarm-systems","provider":"Alo Tech Solutions","version":"1.0","type":"link"}