{"product_id":"honeywell-rm7850a1019-rm7850a-1019-burner-control-module","title":"HONEYWELL RM7850A1019\/RM7850A 1019 Burner Control Module","description":"\u003cp\u003eThe \u003cstrong\u003eHoneywell RM7850A1019\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eRM7850A 1019\u003c\/strong\u003e Burner Control Module, operates as a dedicated hardware component for microprocessor-based burner primary safety control within industrial flame safeguard system platforms.\u003c\/p\u003e\n\u003ch3\u003eHardware 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\u003eRM7850A1019 \/ RM7850A 1019\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.7 kg (1 lb 10 oz) module; 2.0 kg shipping weight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e127 mm x 127 mm x 133 mm (with Q7800A Subbase) \/ 155 mm deep (with Q7800B Subbase)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 deg C to +60 deg C (-40 deg F to +140 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\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\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eMicroprocessor-Based Industrial Burner Programming Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrePurge Period\u003c\/td\u003e\n\u003ctd\u003eDetermined by ST7800A Purge Timer Card\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePostPurge Period\u003c\/td\u003e\n\u003ctd\u003e15 sec\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlame Establishing Period\u003c\/td\u003e\n\u003ctd\u003ePilot: 3 sec or 5 sec; Main: 3 sec, 5 sec, or Intermittent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRequired Accessories\u003c\/td\u003e\n\u003ctd\u003eQ7800A\/B Subbase, ST7800A Timer Card, R78xx Flame Signal Amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApprovals \u0026amp; Directives\u003c\/td\u003e\n\u003ctd\u003eCE (EN298), FM (J.I. OYOA9.AF), FCC Part 15 Class B, GASTEC CE-63AP3070\/1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eAdvanced Signal Isolation \u0026amp; Flame Loop Protection\u003c\/h3\u003e\n\u003cp\u003eIntegrated with cold junction compensation (CJC) concepts for thermal stability and channel-to-channel isolation parameters, the device conditions raw flame detector voltages via interchangeable plug-in amplifiers (R7847, R7849, R7861, or R7886). The internal control logic continuously performs 4-20 mA HART loop protocol diagnostics and status evaluations during pre-purge, ignition sequence, and main flame operation. Nonvolatile EEPROM memory retains running history files and safety lockout status across full power loss events without requiring battery backup maintenance.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What required modular accessories must be installed for the RM7850A1019 to operate?\u003c\/p\u003e\n\u003cp\u003eA: The module requires a Q7800A or Q7800B Universal Wiring Subbase, an ST7800A Plug-in Purge Timer Card to set the pre-purge duration, and a compatible R78xx series Flame Signal Amplifier (R7847, R7849, R7861, or R7886).\u003c\/p\u003e\n\u003cp\u003eQ: How is the purge time programmed or altered on this burner control module?\u003c\/p\u003e\n\u003cp\u003eA: The pre-purge duration is entirely dictated by the hardware rating of the plug-in ST7800A Purge Timer Card selected; changing purge timing requires swapping the physical timer card on the main unit interface.\u003c\/p\u003e\n\u003cp\u003eQ: What happens to sequence records and fault diagnostics during a total AC power loss?\u003c\/p\u003e\n\u003cp\u003eA: The unit utilizes internal nonvolatile memory to preserve all fault histories, lockout status codes, and operating logs permanently through power interruptions without data loss.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMount the module onto either a standard Q7800A or Q7800B universal subbase using the provided retaining screws, verifying 5-thread mechanical engagement prior to applying torque.\u003c\/li\u003e\n\u003cli\u003eRoute high-voltage ignition leads in a dedicated metallic conduit isolated from low-voltage signal wires and flame detector sensor wiring to suppress EMI interference.\u003c\/li\u003e\n\u003cli\u003eVerify that terminal ground connections achieve low-impedance bond directly to the burner housing frame according to industrial field wiring standards.\u003c\/li\u003e\n\u003cli\u003eEnsure external test points remain accessible for voltage verification before energizing the 120 Vac input feed.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":53631245877557,"sku":"RM7850A1019","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/RM7850A1019.png?v=1790132231","url":"https:\/\/www.5gplc.com\/products\/honeywell-rm7850a1019-rm7850a-1019-burner-control-module","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}