{"product_id":"hc-rb4-vfac","title":"MCE HC-RB4-VFAC Relay Board","description":"\u003cp data-path-to-node=\"1\"\u003eThe \u003cb data-path-to-node=\"1\" data-index-in-node=\"4\"\u003eHC-RB4-VFAC\u003c\/b\u003e is a specialized \u003cb data-path-to-node=\"1\" data-index-in-node=\"33\"\u003eRelay Interface Circuit Board\u003c\/b\u003e manufactured by \u003cb data-path-to-node=\"1\" data-index-in-node=\"79\"\u003eMotion Control Engineering (MCE)\u003c\/b\u003e. It is a critical sub-assembly used in \u003cb data-path-to-node=\"1\" data-index-in-node=\"151\"\u003eHydro Main\u003c\/b\u003e elevator controllers to manage high-voltage signaling and relay logic switching.\u003c\/p\u003e\n\u003cp data-path-to-node=\"2\"\u003e\u003cb data-path-to-node=\"2\" data-index-in-node=\"0\"\u003eCore Specifications\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"3\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,0,0\"\u003e\u003cb data-path-to-node=\"3,0,0\" data-index-in-node=\"0\"\u003eComponent Type:\u003c\/b\u003e Relay Interface \/ Control PCB.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,1,0\"\u003e\u003cb data-path-to-node=\"3,1,0\" data-index-in-node=\"0\"\u003eManufacturer:\u003c\/b\u003e Motion Control Engineering (MCE).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,2,0\"\u003e\u003cb data-path-to-node=\"3,2,0\" data-index-in-node=\"0\"\u003ePrimary Voltage:\u003c\/b\u003e \u003cb data-path-to-node=\"3,2,0\" data-index-in-node=\"17\"\u003e120 V AC\u003c\/b\u003e (indicated by the \u003cb data-path-to-node=\"3,2,0\" data-index-in-node=\"44\"\u003eVFAC\u003c\/b\u003e suffix).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,3,0\"\u003e\u003cb data-path-to-node=\"3,3,0\" data-index-in-node=\"0\"\u003eBoard Revision:\u003c\/b\u003e Common versions include Rev 4-1, 4-2, and 4-4.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"3,4,0\"\u003e\u003cb data-path-to-node=\"3,4,0\" data-index-in-node=\"0\"\u003eHardware:\u003c\/b\u003e Features multiple on-board relays (including a dedicated \u003cb data-path-to-node=\"3,4,0\" data-index-in-node=\"67\"\u003eH Relay\u003c\/b\u003e) used for logic routing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-path-to-node=\"4\"\u003e\n\u003ch3 data-path-to-node=\"5\"\u003e\u003cb data-path-to-node=\"5\" data-index-in-node=\"0\"\u003eElevator Logic\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul data-path-to-node=\"6\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,0,0\"\u003e\u003cb data-path-to-node=\"6,0,0\" data-index-in-node=\"0\"\u003eRelay Logic Interface:\u003c\/b\u003e Acts as the physical mounting and wiring interface for multiple control relays, centralizing the switching logic for the elevator's main hydraulic controller.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,1,0\"\u003e\u003cb data-path-to-node=\"6,1,0\" data-index-in-node=\"0\"\u003eCommunication \u0026amp; Control:\u003c\/b\u003e Provides the necessary communication pathways between the main CPU and the physical hardware (valves, contactors, or locks).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,2,0\"\u003e\u003cb data-path-to-node=\"6,2,0\" data-index-in-node=\"0\"\u003eHigh-Voltage Signal Distribution:\u003c\/b\u003e The \u003cb data-path-to-node=\"6,2,0\" data-index-in-node=\"38\"\u003eVFAC\u003c\/b\u003e designation confirms this board is designed to handle 120V AC signal levels, routing them to various field devices without requiring external intermediate terminal strips.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,3,0\"\u003e\u003cb data-path-to-node=\"6,3,0\" data-index-in-node=\"0\"\u003eSystem Reliability:\u003c\/b\u003e By consolidating relays onto a single PCB, it reduces the amount of point-to-point wiring in the controller, minimizing potential failure points from loose wire nuts or crimps.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-path-to-node=\"7\"\u003e\n\u003ch3 data-path-to-node=\"8\"\u003e\u003cb data-path-to-node=\"8\" data-index-in-node=\"0\"\u003eAccessories\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul data-path-to-node=\"9\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,0,0\"\u003e\u003cb data-path-to-node=\"9,0,0\" data-index-in-node=\"0\"\u003eReplacement Relays:\u003c\/b\u003e The board utilizes standard plug-in or soldered relays; specifically, the \u003cb data-path-to-node=\"9,0,0\" data-index-in-node=\"94\"\u003eH Relay\u003c\/b\u003e is a common point of failure and replacement.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"9,1,0\"\u003e\u003cb data-path-to-node=\"9,1,0\" data-index-in-node=\"0\"\u003eStandoff Mounting Kits:\u003c\/b\u003e Used to isolate the PCB from the metal controller cabinet to prevent grounding shorts.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-path-to-node=\"10\"\u003e\n\u003ch3 data-path-to-node=\"11\"\u003e\u003cb data-path-to-node=\"11\" data-index-in-node=\"0\"\u003eMaintenance \u0026amp; Code\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul data-path-to-node=\"12\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,0,0\"\u003e\u003cb data-path-to-node=\"12,0,0\" data-index-in-node=\"0\"\u003eCanadian Code Compliance:\u003c\/b\u003e As a core control component, ensure the board revision (e.g., Rev 4-4) matches the original precisely to maintain the elevator's safety listing and operational parameters.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,1,0\"\u003e\u003cb data-path-to-node=\"12,1,0\" data-index-in-node=\"0\"\u003eVisual Inspection:\u003c\/b\u003e Regularly check the PCB for signs of overheating or \"burning\" around the relay pin solder joints, which can occur due to high-current switching.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,2,0\"\u003e\u003cb data-path-to-node=\"12,2,0\" data-index-in-node=\"0\"\u003eRelay Seating:\u003c\/b\u003e Ensure all plug-in relays are fully seated in their sockets; vibration from the hydraulic pump can occasionally cause them to loosen, leading to intermittent \"Out of Service\" faults.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,3,0\"\u003e\u003cb data-path-to-node=\"12,3,0\" data-index-in-node=\"0\"\u003eVoltage Testing:\u003c\/b\u003e When troubleshooting, verify that 120V AC is present at the input terminals. If the board is receiving power but not triggering relays, the internal trace or the relay coil itself has likely failed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"R.A.M. Parts","offers":[{"title":"Default Title","offer_id":49103156150424,"sku":null,"price":0.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0741\/4369\/5000\/files\/rn-image_picker_lib_temp_ac95c5ea-7599-4b9a-8380-cf1d4affc3fb.jpg?v=1778707455","url":"https:\/\/parts4rem.ca\/products\/hc-rb4-vfac","provider":"Parts4REM","version":"1.0","type":"link"}