{"product_id":"honeywell-rm7895a1014-7800-series-burner-control-unit","title":"Honeywell RM7895A1014 7800 Series Burner Control Unit","description":"\u003cp\u003eThe \u003cstrong\u003eHoneywell RM7895A1014\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eRM7895A1014\u003c\/strong\u003e Burner Control Unit, operates as a dedicated hardware component for primary flame safeguard execution and automatic burner sequencing within industrial combustion networks. Operating on a 120 VAC (50\/60 Hz) power supply, the microprocessor-based relay module processes intermittent pilot ignition, intermittent main flame establishing periods, selectable interlocks, and purge timing dictated by an ST7800A plug-in purge timer card.\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\u003eRM7895A1014\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\u003e0.9 kg (Module); 2.9 kg (Shipping Weight)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e127 mm W x 127 mm H x 133 mm D (Q7800A) \/ 155 mm D (Q7800B)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to +60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to +60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eStandard 120 VAC Base Load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e120 VAC (+10, -15%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency\u003c\/td\u003e\n\u003ctd\u003e50\/60 Hz (+\/- 10%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePilot Flame Period\u003c\/td\u003e\n\u003ctd\u003e4 sec or 10 sec\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMain Flame Period\u003c\/td\u003e\n\u003ctd\u003eIntermittent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePilot Type\u003c\/td\u003e\n\u003ctd\u003eIntermittent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrePurge\u003c\/td\u003e\n\u003ctd\u003eDetermined by ST7800A Plug-in Purge Timer Card\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelayed Main Valve\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVibration Resistance\u003c\/td\u003e\n\u003ctd\u003e0.5 G environment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRequired Subbase\u003c\/td\u003e\n\u003ctd\u003eQ7800A or Q7800B Universal Wiring Subbase\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 and Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe RM7895A1014 utilizes internal signal filtering and channel-to-channel isolation principles to shield sensitive microampere flame sensor amplifier circuits (R7847, R7848, R7849, R7851, R7852, R7861, or R7886) from high-voltage AC ignition interference and line power fluctuations. The solid-state control architecture decouples low-voltage diagnostic loops and purge timing circuits from the main 120 VAC switching relays and external field wiring terminals. This strict isolation topology prevents ground-loop current shifts and eliminates inductive cross-talk, maintaining deterministic sequence control, continuous flame validation, and rapid safety lockout execution.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How is the pre-purge timing duration established on the RM7895A1014 relay module?\u003c\/p\u003e\n\u003cp\u003eA: Pre-purge duration is strictly determined by inserting a compatible ST7800A Plug-in Purge Timer Card into the front-facing header interface of the module prior to energizing the unit.\u003c\/p\u003e\n\u003cp\u003eQ: What mandatory hardware components must be combined with the RM7895A1014 for operation?\u003c\/p\u003e\n\u003cp\u003eA: The module requires a Q7800A or Q7800B Universal Wiring Subbase, an ST7800A Plug-in Purge Timer Card, and a compatible 7800 Series Flame Signal Amplifier (such as R7847, R7848, R7849, R7851, R7852, R7861, or R7886).\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMount the designated Q7800A or Q7800B wiring subbase onto a flat, rigid control panel to ensure module rear connector pins mate cleanly without mechanical binding.\u003c\/li\u003e\n\u003cli\u003eSeparate low-voltage flame scanner cabling from 120 VAC control lines and high-voltage ignition transformer leads by running them in isolated, grounded metallic conduits.\u003c\/li\u003e\n\u003cli\u003eConnect the main equipment grounding conductor directly to the grounding terminal of the Q7800 subbase using a low-impedance copper wire to prevent floating ground loops.\u003c\/li\u003e\n\u003cli\u003eTorque all subbase wiring screw terminals to standard industrial limits (8 to 10 in-lbs) to ensure vibration-resistant, low-resistance electrical connections across active circuits.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":48791309320382,"sku":"RM7895A1014","price":172.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/RM7888A1027_0263e5e1-051f-43be-9fb6-bb9e18488c49.png?v=1787816434","url":"https:\/\/www.autooiltech.com\/products\/honeywell-rm7895a1014-7800-series-burner-control-unit","provider":"AutoOilTech Limited","version":"1.0","type":"link"}