{"product_id":"honeywell-rm7897c1000-flame-safeguard-control-module","title":"Honeywell RM7897C1000 Flame Safeguard Control Module","description":"\u003cp\u003eConfigured for automatic flame safeguard control and programmable post-purge sequence timing in 7800 SERIES burner installations, the \u003cstrong\u003eHoneywell RM7897C1000\u003c\/strong\u003e (\u003cstrong\u003eRM7897C1000\u003c\/strong\u003e Control) provides direct physical\/electrical execution. It directly controls safety shutoff valves, ignition transformers, draft fans, and auxiliary interlock loops to deliver fail-safe sequencing during burner startup, operation, and shutdown sequences.\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\u003eRM7897C1000\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 \/ Mexico\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e2.30 lbs (1.04 kg)\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 Q7800 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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e10 W nominal\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 Control\u003c\/td\u003e\n\u003ctd\u003eProgrammable via S7800 display interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCore Function\u003c\/td\u003e\n\u003ctd\u003eFlame Safeguard Sequencing and Interlock Supervision\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProcess Control and DCS Interface Features\u003c\/h3\u003e\n\u003cp\u003eThe module provides isolated digital outputs to drive dynamic self-checking flame detectors and primary safety shutoff valves via internal heavy-duty relay contacts. Robust channel-to-channel isolation separates line-voltage load outputs from low-voltage micro-ampere flame sensor inputs. Data exchange with host DCS or PLC automation systems operates over a dedicated serial ControlBus network, transmitting diagnostic codes, sequence status, and real-time flame signal strength without compromising hardwired safety trip circuits.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How is the post-purge timing programmed on the RM7897C1000 control module?\u003c\/p\u003e\n\u003cp\u003eA: Programmable post-purge duration is configured using an optional S7800 Keyboard Display Module connected directly to the front serial port of the RM7897C1000.\u003c\/p\u003e\n\u003cp\u003eQ: Are plug-in accessory cards required for operation?\u003c\/p\u003e\n\u003cp\u003eA: Yes, the RM7897C1000 requires a plug-in ST7800 purge timer card, a compatible flame signal amplifier module, and a Q7800 series wiring subbase for complete hardware assembly.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eDe-energize all power lines feeding the Q7800 wiring subbase before attempting module mounting or terminal service.\u003c\/li\u003e\n\u003cli\u003eConfirm subbase terminal assignments align with the 120 VAC main supply and external load current ratings prior to system startup.\u003c\/li\u003e\n\u003cli\u003eSeat the module vertically onto the subbase, tightening the captive mounting screws to ensure reliable ground continuity and vibration resistance.\u003c\/li\u003e\n\u003cli\u003eRoute flame sensor wiring and ControlBus communication cables in dedicated conduits separated from high-voltage ignition leads by at least 150 mm.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":45396605304947,"sku":"RM7897C1000","price":233.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/screenshot_2026-08-25_10-01-30_6153cf00-6ebd-4c9f-88a4-7f4ed5b5da3e.png?v=1787623958","url":"https:\/\/www.dcssupplier.com\/ar\/products\/honeywell-rm7897c1000-flame-safeguard-control-module","provider":"DcsSupplier Limited","version":"1.0","type":"link"}