{"product_id":"rm7890b1014-u-honeywell-burner-control-relay","title":"RM7890B1014\/U | Honeywell | Burner Control Relay","description":"\u003cp\u003eConfigured for burner management and safety sequencing in single burner combustion systems, the \u003cstrong\u003eHoneywell RM7890B1014\/U\u003c\/strong\u003e (\u003cstrong\u003eRM7890B1014\/U\u003c\/strong\u003e Burner Control Relay) provides direct physical\/electrical execution.\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\u003eRM7890B1014\/U\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\u003eStandard Industrial Manufacturing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.8 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard 7800 Series plug-in module profile\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\u003eMax 10 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput 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\u003eOutput Contacts\u003c\/td\u003e\n\u003ctd\u003e2 SPDT relays\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlame Establishing Period\u003c\/td\u003e\n\u003ctd\u003eSelectable 4 or 10 seconds (intermittent pilot)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eChannel-To-Channel Isolation And Loop Protocol Integrity\u003c\/h3\u003e\n\u003cp\u003eThe module integrates specialized flame amplifier inputs compatible with R7847, R7848, R7849, R7851, R7861, and R7886 sensors, maintaining strict electrical isolation between high-voltage combustion interlocks and low-voltage system logic. It supports data communication bus modules and PC interface protocols while providing galvanic separation to protect burner management networks from electromagnetic interference and ground potential shifts. Cold junction compensation (CJC) and internal nonvolatile memory safeguard sequence tracking and fault history retention during transient power losses.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the RM7890B1014\/U burner control relay be hot-swapped while the burner management panel is energized?\u003c\/p\u003e\n\u003cp\u003eA: No. Main electrical power and 120 VAC supply lines must be completely isolated and locked out prior to removing or inserting the module on its Q7800 subbase to prevent internal component damage or accidental ignition staging.\u003c\/p\u003e\n\u003cp\u003eQ: How is the flame establishing period configured on this module?\u003c\/p\u003e\n\u003cp\u003eA: The flame establishing period is selectable for either 4 seconds or 10 seconds via internal hardware jumper settings or configuration tools prior to final system commissioning.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEnsure all primary 120 VAC power feeds and burner interlock circuits are locked out and tagged out before handling the unit.\u003c\/li\u003e\n\u003cli\u003eMount the module securely onto a compatible Q7800A or Q7800B universal wiring subbase, ensuring all plug-in pin connectors seat fully without binding.\u003c\/li\u003e\n\u003cli\u003eVerify correct wiring of input power terminals and ensure flame detector signal leads maintain proper shielding against high-voltage ignition interference.\u003c\/li\u003e\n\u003cli\u003eTest system sequencing, pilot flame establishing intervals, and safety shut-off valve response via manual burner startup checks before returning the equipment to operational service.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":67683134406965,"sku":"RM7890B1014\/U","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/RM7890B1014U.png?v=1791878572","url":"https:\/\/www.5gplc.com\/products\/rm7890b1014-u-honeywell-burner-control-relay","provider":"High Five Auto Solution Limited","version":"1.0","type":"link"}