{"product_id":"rm7890a1056-honeywell-7800-series-on-off-primary-burner-control-120-vac-410-sec-pilot","title":"RM7890A1056 | Honeywell 7800 Series On-Off Primary Burner Control 120 VAC 4\/10 Sec Pilot","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-end=\"396\" data-start=\"144\"\u003eThe Honeywell RM7890A1056 is a microprocessor-based primary burner control for automatically fired gas, oil, or combination-fuel single-burner systems. Operating on 120 VAC, it provides automatic sequencing, flame supervision, system diagnostics, and safety interlocks for reliable on-off burner operation with 4 or 10-second pilot flame establishing periods.\u003c\/p\u003e\n\u003cp class=\"\" data-end=\"574\" data-start=\"284\"\u003e \u003c\/p\u003e\n\u003cp class=\"\" data-end=\"574\" data-start=\"284\"\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications \u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHVAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRM7890A1056\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBurner Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e7800 Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eControl Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOn–Off Primary Burner Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePilot Flame Establishing Period\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 or 10 seconds (selectable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMain Flame Establishing Period\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIntermittent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120 VAC (+10 \/ –15 %), 50\/60 Hz (±10 %)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Dissipation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10 W maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Connected Load\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2000 VA max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFuse Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15 A (max), fast-blow type SC or equivalent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAmbient Operating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e–40 °F to +140 °F (–40 °C to +60 °C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStorage Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e–40 °F to +150 °F (–40 °C to +66 °C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRelative Humidity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e85 % (non-condensing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVibration Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.5 G\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSafety Integrity Level\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSIL 3 capable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRequired Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSubbase \u0026amp; flame amplifier (ordered separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCommunication Options\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eKeyboard Display Module, DATA CONTROLBUS™, PC interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIndicator LEDs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 status and sequence LEDs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnclosure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMolded plastic, panel-mount module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGas, oil, or combination-fuel burner systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.75 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 data-sheets-root=\"1\"\u003eRM7890A1056\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003eThe RM7890A1056 is part of Honeywell’s 7800 Series of advanced relay modules designed for safe and efficient control of industrial and commercial burners. This model supports intermittent pilot operation and integrates safety monitoring, system diagnostics, and event logging for improved reliability and troubleshooting. It requires a compatible subbase and plug-in flame amplifier to operate, with options for local or remote annunciation via keyboard display modules or the DATA CONTROLBUS™ system. The RM7890A1056 uses nonvolatile memory to retain system history and status through power interruptions and is SIL 3 capable when installed in a properly designed safety instrumented system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMicroprocessor-Based Control: Provides precise sequencing and flame supervision for gas, oil, or dual-fuel burners.\u003c\/li\u003e\n\u003cli\u003eIntermittent Pilot Operation: Supports 4 or 10-second pilot flame establishing periods with continuous main flame monitoring.\u003c\/li\u003e\n\u003cli\u003eIntegrated Self-Diagnostics: Continuously checks system integrity and displays fault codes for faster troubleshooting.\u003c\/li\u003e\n\u003cli\u003eNonvolatile Memory: Retains operating history, fault data, and last sequence position after power loss.\u003c\/li\u003e\n\u003cli\u003eMultiple Communication Options: Compatible with remote annunciators, keyboard display modules, and PC interfaces.\u003c\/li\u003e\n\u003cli\u003eLED Status Indicators: Five front-panel LEDs provide visual sequence, operation, and fault information.\u003c\/li\u003e\n\u003cli\u003eInterchangeable Flame Amplifiers: Accepts plug-in UV, rectification, or infrared amplifiers for application flexibility.\u003c\/li\u003e\n\u003cli\u003eRemote Reset and Reporting: Optional external reset capability and event report generation enhance field usability.\u003c\/li\u003e\n\u003cli\u003eSIL 3 Capable: Meets IEC 61508 requirements when used in a certified safety system for critical combustion control.\u003c\/li\u003e\n\u003cli\u003eWide Operating Range: Functions in temperatures from –40 °F to +140 °F (–40 °C to +60 °C) and 85 % RH non-condensing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe RM7890A1056 delivers the safety, reliability, and control precision required for modern combustion management systems.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":49105122033920,"sku":"RM7890A1056","price":1109.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0388\/5331\/2557\/files\/shopping_6_74413d63-74ab-4824-b0c4-0bf4c1b797a6.webp?v=1785540734","url":"https:\/\/alotechparts.com\/products\/rm7890a1056-honeywell-7800-series-on-off-primary-burner-control-120-vac-410-sec-pilot","provider":"Alo Tech Solutions","version":"1.0","type":"link"}