{"product_id":"honeywell-rm7840e1016-burner-control","title":"Honeywell RM7840E1016 Burner Control","description":"\u003cp\u003eConfigured for automatic burner sequencing and flame safety monitoring in industrial fuel-burning systems, the \u003cstrong\u003eHoneywell RM7840E1016\u003c\/strong\u003e (\u003cstrong\u003eRM7840E\u003c\/strong\u003e Relay Module) provides direct physical\/electrical execution. It establishes solid-state timing, internal flame signal amplification, pilot\/main valve firing sequences, and safety limit supervision. The module incorporates a protective dust cover and integrates direct terminal outputs for early spark termination and dedicated post-purge functionality.\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\u003eRM7840E1016\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 (Approx. 5.0 in x 5.0 in x 2.5 in)\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 (+10% \/ -15%), 50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePost Purge Duration\u003c\/td\u003e\n\u003ctd\u003e15 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEarly Spark Termination\u003c\/td\u003e\n\u003ctd\u003e5 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePilot Ignition Type\u003c\/td\u003e\n\u003ctd\u003eInterrupted Pilot \/ Interrupted Second Stage Pilot Valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAirflow Safety Check\u003c\/td\u003e\n\u003ctd\u003eUser Selectable Switch Function\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Type\u003c\/td\u003e\n\u003ctd\u003eDust-Covered Plug-in Relay Module\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; Flame Signal Amplification\u003c\/h3\u003e\n\u003cp\u003eThe Honeywell RM7840E relay module interfaces directly with plug-in flame signal amplifiers and system keypads across the 7800 Series ecosystem. It isolates dynamic flame sensor micro-amp signals (rectification, ultraviolet, or infrared) from internal microcomputer logic. System monitoring outputs and optional expansion modules support integration into 4-20 mA HART loop protocol adapters and distributed control system (DCS) architectures. Internal isolated circuitry ensures continuous channel-to-channel isolation between high-voltage ignition line outputs, low-voltage sensor lines, and backplane communication paths, preventing electrical noise ingress into plant control networks.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the RM7840E1016 module be hot-swapped while the wiring subbase is energized?\u003c\/p\u003e\n\u003cp\u003eA: No. Power must be completely removed from the subbase prior to installing or removing the module. Hot-swapping under load risks electrical arcing across backplane terminal pins and can trigger false lockouts or permanent hardware damage.\u003c\/p\u003e\n\u003cp\u003eQ: What happens if the airflow switch fails to close during the pre-purge sequence?\u003c\/p\u003e\n\u003cp\u003eA: If the user-selectable airflow check fails to detect closed contact status within the specified cycle window, the module halts the ignition sequence immediately and locks out in a safe shutdown condition.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eMount the matching 7800 Series wiring subbase on a flat vertical surface inside a grounded metal control enclosure. Ensure line voltage connections conform to local electrical safety codes.\u003c\/li\u003e\n\u003cli\u003eMaintain dedicated isolation between high-voltage ignition transformer leads and low-voltage flame sensor wiring. Run flame scanner cabling in separate grounded conduit to prevent signal interference.\u003c\/li\u003e\n\u003cli\u003eEnsure correct pin alignment when plugging the RM7840E1016 unit into the wiring subbase. Tighten integral securing screws firmly to ensure reliable electrical contact across all terminal blades.\u003c\/li\u003e\n\u003cli\u003eVerify system grounding: connect the subbase earth terminal directly to the central panel earth busbar with heavy-gauge copper wire to satisfy industrial noise immunity requirements.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":45434623885427,"sku":"RM7840E1016","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/RM7838C1004.png?v=1788319555","url":"https:\/\/www.dcssupplier.com\/products\/honeywell-rm7840e1016-burner-control","provider":"DcsSupplier Limited","version":"1.0","type":"link"}