{"product_id":"honeywell-rm7838c1004-burner-control-modules","title":"Honeywell RM7838C1004 Burner Control Modules","description":"\u003cp\u003eThe \u003cstrong\u003eHoneywell RM7838C1004\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eRM7838C\u003c\/strong\u003e Burner Control Unit, operates as a dedicated hardware component for semi-automatic programming control and flame safety monitoring within 7800 Series platforms. It controls pilot\/main valve timing, processes lockout interlocks, and interfaces directly with a keyboard display module. The unit incorporates pre-ignition checks, interrupted pilot operation, and a 10-second main flame establishing period.\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\u003eRM7838C1004\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\u003e3.00 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard 7800 Series Footprint\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\u003e10 W Maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e120 VAC, 50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Type\u003c\/td\u003e\n\u003ctd\u003eSemi-Automatic Programming Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMain Flame Establishing Period\u003c\/td\u003e\n\u003ctd\u003e10 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePilot Type\u003c\/td\u003e\n\u003ctd\u003eInterrupted \/ Intermittent Pilot Type\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUser Interface Integration\u003c\/td\u003e\n\u003ctd\u003ePlug-in Keyboard Display Module Supported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Features\u003c\/td\u003e\n\u003ctd\u003ePre-Ignition \u0026amp; Lockout Interlocks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003e4-20 mA HART Loop Protocol \u0026amp; Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe Honeywell RM7838C relay module isolates dynamic micro-amp flame sensor signals from backplane logic while communicating status parameters to system keypads. Integrated signal paths allow relay status and flame strength data to interface with external 4-20 mA HART loop protocol adapters and DCS field networks. Internal channel-to-channel isolation safeguards central processing components from line-voltage ignition transients, preventing electrical noise propagation into downstream control loops.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the RM7838C1004 relay module be unplugged while the subbase is energized?\u003c\/p\u003e\n\u003cp\u003eA: No. Operating power must be disconnected from the subbase before inserting or removing the module to prevent electrical contact arcing, false interlock trips, or physical module damage.\u003c\/p\u003e\n\u003cp\u003eQ: How does the unit handle a loss of flame signal during normal operation?\u003c\/p\u003e\n\u003cp\u003eA: If the flame signal is lost during execution, the module opens the safety limit circuit, de-energizes the fuel valves immediately, and initiates a lockout shutdown state.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eMount the matching 7800 Series wiring subbase inside a grounded metal enclosure to shield control logic from external electromagnetic interference.\u003c\/li\u003e\n\u003cli\u003eSeparate high-voltage ignition cabling from low-voltage flame sensor leads. Run sensor lines in distinct grounded metallic conduit to prevent signal cross-talk.\u003c\/li\u003e\n\u003cli\u003eAlign the RM7838C1004 module guide pins directly with the subbase socket and tighten the integral mounting screws to complete the mechanical ground path.\u003c\/li\u003e\n\u003cli\u003eConnect the main panel earth ground bus directly to the ground lug on the subbase using heavy-gauge copper wire.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":45434987741299,"sku":"RM7838C1004","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/RM7838C1004_33f9a082-e250-453c-b9eb-ab927d277fd4.png?v=1788319567","url":"https:\/\/www.dcssupplier.com\/ar\/products\/honeywell-rm7838c1004-burner-control-modules","provider":"DcsSupplier Limited","version":"1.0","type":"link"}