{"product_id":"honeywell-rm7898a1000-7800-series-relay-module","title":"Honeywell RM7898A1000 7800 Series Relay Module","description":"\u003cdiv class=\"qk-md-paragraph qk-md-has-multi-modal\"\u003e\n\u003cp\u003eConfigured for microprocessor-based burner management and flame safety sequencing in 7800 Series control systems, the \u003cstrong\u003eHoneywell RM7898A1000\u003c\/strong\u003e (\u003cstrong\u003eRM7898A\u003c\/strong\u003e Relay Module) provides direct physical\/electrical execution. It controls automatic burner sequencing, ignition timing, flame supervision, and safe shutdown operations across industrial combustion systems.\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\u003eRM7898A1000 (RM7898A)\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\u003e1.04 kg (2.30 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e127 mm x 127 mm x 60 mm\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\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e120 VAC (+10\/-15%), 50\/60 Hz (10 VA max)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003ePrimary Burner Control Relay Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFeatures\u003c\/td\u003e\n\u003ctd\u003eSelectable Pilot Type, Preignition Purge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTiming Functions\u003c\/td\u003e\n\u003ctd\u003e4 s or 10 s Pilot Flame Establishing Period (PFEP)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterlocks\u003c\/td\u003e\n\u003ctd\u003eSelectable Running Interlocks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Family\u003c\/td\u003e\n\u003ctd\u003e7800 Series Burner Controls\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 Integration and Channel-to-Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe RM7898A1000 incorporates optically decoupled inputs and decoupled internal signal lines to isolate sensitive microprocessors from high-voltage ignition noise and field contact surges. Channel-to-channel isolation between low-voltage flame sensing circuits and 120 VAC output terminals prevents electrical transients from interfering with logic execution. When operated in combined control cabinets alongside process instrumentation using 4-20 mA HART loop protocol transmitters or cold junction compensation (CJC) thermocouple modules, the relay module maintains high electromagnetic noise immunity and prevents signal degradation across field control loops.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What is the key functional difference between the RM7898A1000 and the RM7898A1018?\u003c\/p\u003e\n\u003cp\u003eA: The RM7898A1000 provides standard 7800 Series burner sequencing and flame monitoring without the integrated Valve Proving System (VPS) present on the RM7898A1018 model.\u003c\/p\u003e\n\u003cp\u003eQ: Is the RM7898A1000 compatible with standard Q7800 wiring subbases?\u003c\/p\u003e\n\u003cp\u003eA: Yes. The card mounts directly onto standard 7800 Series subbases (such as the Q7800A, B, or C), engaging the rear terminal pins into the subbase chassis sockets.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eDisconnect all 120 VAC electrical power feeds to the control cabinet before mounting or wiring the relay module.\u003c\/li\u003e\n\u003cli\u003eAlign the rear connector header pins of the RM7898A1000 with the terminal block socket of the Q7800 subbase.\u003c\/li\u003e\n\u003cli\u003ePush the module firmly onto the subbase until the top and bottom captive retaining screws line up with the mounting posts.\u003c\/li\u003e\n\u003cli\u003eTorque the retaining screws to 0.8 Nm to secure the unit against vibration and ensure electrical contact continuity.\u003c\/li\u003e\n\u003cli\u003eRoute flame sensor input cables in dedicated shielded conduit separate from high-voltage AC lines, grounding the shield at the panel functional earth (FE) terminal.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":52703056199960,"sku":"RM7898A1000","price":75.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0892\/3483\/3688\/files\/R7120M1001_Cocoai.jpg?v=1789719450","url":"https:\/\/www.innoplcsync.com\/products\/honeywell-rm7898a1000-7800-series-relay-module","provider":"InnoPLC Sync Co., Ltd.","version":"1.0","type":"link"}