{"product_id":"honeywell-rm7850a1001-7800-series-burner-control-relay-module","title":"Honeywell RM7850A1001 7800 Series Burner Control Relay Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\u003cp\u003eThe Honeywell RM7850A1001 is a microprocessor-based integrated burner control relay module from the 7800 Series, specifically engineered for the automated sequencing, supervision, and safety management of industrial burner systems. This module provides comprehensive control over the entire combustion cycle, including purge, ignition, pilot transition, and shutdown logic. It is widely utilized in critical applications such as power plant boilers, refinery furnaces, and large-scale industrial heating processes where precise ignition control and robust flame safety interlocking are mandatory.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eIntegrated burner sequencing logic for automated start-up and shutdown cycles.\u003c\/li\u003e\n\u003cli\u003eSupports interrupted pilot operation for enhanced safety during ignition sequences.\u003c\/li\u003e\n\u003cli\u003eConfigurable airflow proving logic to validate combustion air conditions prior to ignition.\u003c\/li\u003e\n\u003cli\u003eDeterministic timing control ensures compliance with industrial safety standards and European combustion timing requirements.\u003c\/li\u003e\n\u003cli\u003eFast response lockout interlocks with diagnostic feedback for rapid fault isolation and reduced system downtime.\u003c\/li\u003e\n\u003cli\u003eReliable relay architecture designed for continuous thermal cycling in demanding environments.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eIndustrial boiler management systems.\u003c\/li\u003e\n\u003cli\u003eRefinery and petrochemical furnace control.\u003c\/li\u003e\n\u003cli\u003eLarge-scale commercial and industrial heating processes.\u003c\/li\u003e\n\u003cli\u003eCombustion safety interlocking for gas and oil-fired burners.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eRM7850A1001\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003e7800 Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e120 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e8 to 12 VA (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIgnition Mode\u003c\/td\u003e\n\u003ctd\u003eInterrupted pilot\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePostpurge Time\u003c\/td\u003e\n\u003ctd\u003e0.2 seconds (fixed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003e7800 Series base (panel or rack)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEnsure the system power is disconnected before installing or removing the module from its base.\u003c\/li\u003e\n\u003cli\u003eThe module must be mounted on a compatible 7800 Series wiring base.\u003c\/li\u003e\n\u003cli\u003eVerify that all external safety chain inputs and flame detector wiring are securely terminated according to the local electrical code and system wiring diagrams.\u003c\/li\u003e\n\u003cli\u003eMaintain proper ventilation around the module to ensure operating temperatures remain within the 0 to 60 deg C range.\u003c\/li\u003e\n\u003cli\u003eFollow standard ESD (Electrostatic Discharge) handling procedures when touching internal components or connectors.\u003c\/li\u003e\n\u003cli\u003eEnsure that the airflow proving switch is correctly calibrated and wired to the designated input channels to prevent unsafe ignition sequences.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch3\u003eWhat is the primary function of the RM7850A1001?\u003c\/h3\u003e\u003cp\u003eThe RM7850A1001 acts as the central safety and sequencing controller for industrial burners, managing the ignition, flame monitoring, and shutdown sequences to ensure safe combustion operation.\u003c\/p\u003e\u003ch3\u003eIs this module compatible with existing 7800 Series bases?\u003c\/h3\u003e\u003cp\u003eYes, the RM7850A1001 is designed for use with the standard Honeywell 7800 Series mounting bases, allowing for straightforward integration into existing control panels.\u003c\/p\u003e\u003ch3\u003eWhat does the 0.2 second postpurge timing signify?\u003c\/h3\u003e\u003cp\u003eThe fixed 0.2 second postpurge timing is a safety feature that ensures the rapid removal of residual gases from the combustion chamber immediately following a burner shutdown, preventing the accumulation of combustible mixtures.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":50912771408124,"sku":"RM7850A1001","price":172.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/wm_1_5c0c0fb7-49f6-4e9e-8950-bd385f508810.jpg?v=1785758260","url":"https:\/\/www.electronicplc.com\/ar\/products\/honeywell-rm7850a1001-7800-series-burner-control-relay-module","provider":"Electronic PLC","version":"1.0","type":"link"}