{"product_id":"siemens-3rh2911-1fa04-contacter-auxiliary","title":"Siemens 3RH2911-1FA04 Auxiliary Contact Block","description":"\u003cp data-path-to-node=\"1\"\u003eThe \u003cb data-path-to-node=\"1\" data-index-in-node=\"4\"\u003eSiemens 3RH2911-1FA04\u003c\/b\u003e is a 4-pole, front-mounted auxiliary contact block part of the \u003cb data-path-to-node=\"1\" data-index-in-node=\"89\"\u003eSIRIUS Innovations\u003c\/b\u003e line. In the Canadian elevator industry, this specific configuration is often used in \u003cb data-path-to-node=\"1\" data-index-in-node=\"194\"\u003eSafety Monitoring Circuits\u003c\/b\u003e and \u003cb data-path-to-node=\"1\" data-index-in-node=\"225\"\u003eContactor State Feedback\u003c\/b\u003e. It is designed to snap onto the front of \u003cb data-path-to-node=\"1\" data-index-in-node=\"292\"\u003e3RT2\u003c\/b\u003e contactors or \u003cb data-path-to-node=\"1\" data-index-in-node=\"311\"\u003e3RH2\u003c\/b\u003e control relays across all frame sizes from \u003cb data-path-to-node=\"1\" data-index-in-node=\"359\"\u003eS00 to S3\u003c\/b\u003e.\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\"\u003eSeries:\u003c\/b\u003e 3RH29 (SIRIUS Innovations)\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\"\u003eMounting:\u003c\/b\u003e Front-mounted (Top snap)\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\"\u003eContact Configuration:\u003c\/b\u003e \u003cb data-path-to-node=\"3,2,0\" data-index-in-node=\"23\"\u003e0 NO \/ 4 NC\u003c\/b\u003e (Four Normally Closed contacts)\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\"\u003eCurrent Rating:\u003c\/b\u003e 10A (Thermal) \/ 6A (AC-15 at 230V)\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\"\u003eTerminal Type:\u003c\/b\u003e Screw terminals (Pozi-drive)\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\"\u003eSpecific Contact Logic (0 NO + 4 NC)\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp data-path-to-node=\"6\"\u003eThe \"04\" designation is a specialized configuration. Because it contains only NC contacts, it is primarily utilized for \u003cb data-path-to-node=\"6\" data-index-in-node=\"120\"\u003eFail-Safe Monitoring\u003c\/b\u003e:\u003c\/p\u003e\n\u003cul data-path-to-node=\"7\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,0,0\"\u003e\u003cb data-path-to-node=\"7,0,0\" data-index-in-node=\"0\"\u003eRedundant Feedback:\u003c\/b\u003e Used to provide multiple independent signals to the elevator CPU verifying that the contactor has fully de-energized.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,1,0\"\u003e\u003cb data-path-to-node=\"7,1,0\" data-index-in-node=\"0\"\u003eMirror Contact Safety:\u003c\/b\u003e These are certified \"Mirror Contacts.\" Per IEC and Canadian safety standards, if a main power pole on the contactor welds shut, these NC contacts are mechanically guaranteed not to close, preventing the controller from misinterpreting the state of the machine.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,2,0\"\u003e\u003cb data-path-to-node=\"7,2,0\" data-index-in-node=\"0\"\u003eComplex Interlocking:\u003c\/b\u003e Useful in multi-contactor logic where several \"not-running\" signals must be verified before the safety string can be reset.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-path-to-node=\"8\"\u003e\n\u003ch3 data-path-to-node=\"9\"\u003e\u003cb data-path-to-node=\"9\" data-index-in-node=\"0\"\u003eInstallation \u0026amp; Mechanical Integration\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul data-path-to-node=\"10\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,0,0\"\u003e\u003cb data-path-to-node=\"10,0,0\" data-index-in-node=\"0\"\u003eTool-Free Mounting:\u003c\/b\u003e The block snaps into the center slot of the base contactor. To remove it, you simply depress the release lever on the top of the block.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,1,0\"\u003e\u003cb data-path-to-node=\"10,1,0\" data-index-in-node=\"0\"\u003ePositively Driven:\u003c\/b\u003e The internal actuator is physically linked to the contactor's armature, ensuring that the timing of the NC contacts opening\/closing is synchronized with the main power poles.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,2,0\"\u003e\u003cb data-path-to-node=\"10,2,0\" data-index-in-node=\"0\"\u003eHigh-Density Logic:\u003c\/b\u003e By mounting to the front, you expand your logic capacity without using any additional DIN rail space, which is critical in compact Canadian controller enclosures.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-path-to-node=\"11\"\u003e\n\u003ch3 data-path-to-node=\"12\"\u003e\u003cb data-path-to-node=\"12\" data-index-in-node=\"0\"\u003eField Maintenance \u0026amp; Canadian Code Notes\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul data-path-to-node=\"13\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"13,0,0\"\u003e\u003cb data-path-to-node=\"13,0,0\" data-index-in-node=\"0\"\u003eB44 Code Compliance:\u003c\/b\u003e Many modern elevator controllers (like those from \u003cb data-path-to-node=\"13,0,0\" data-index-in-node=\"71\"\u003eMCE, KEB, or GAL\u003c\/b\u003e) use these NC contacts to comply with the B44 requirement for \"Contactor Monitoring.\" If the NC contact fails to close when the car stops, the controller will \"lock out\" to prevent a potentially dangerous start with a welded contactor.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"13,1,0\"\u003e\u003cb data-path-to-node=\"13,1,0\" data-index-in-node=\"0\"\u003eDiagnostic Troubleshooting:\u003c\/b\u003e If the elevator is throwing \"Contactor Feedback\" or \"Input Mismatch\" errors, a high-resistance or carbonized contact in this 3RH29 block is a common culprit. Replace the block if the resistance across any NC terminal pair exceeds \u003cb data-path-to-node=\"13,1,0\" data-index-in-node=\"258\"\u003e1–2 ohms\u003c\/b\u003e when the contactor is at rest.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"13,2,0\"\u003e\u003cb data-path-to-node=\"13,2,0\" data-index-in-node=\"0\"\u003eTerminal Torque:\u003c\/b\u003e Ensure the logic wires are torqued to \u003cb data-path-to-node=\"13,2,0\" data-index-in-node=\"55\"\u003e0.8–1.2 Nm\u003c\/b\u003e. Over-tightening can crack the plastic housing, while under-tightening leads to intermittent signals that are notoriously difficult to track down.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"13,3,0\"\u003e\u003cb data-path-to-node=\"13,3,0\" data-index-in-node=\"0\"\u003eCompatibility Check:\u003c\/b\u003e This block is for \u003cb data-path-to-node=\"13,3,0\" data-index-in-node=\"39\"\u003e3RT2\/3RH2\u003c\/b\u003e (Innovations) series only. It will not fit the older \u003cb data-path-to-node=\"13,3,0\" data-index-in-node=\"102\"\u003e3RT1\u003c\/b\u003e (Legacy Sirius) contactors. For older units, the equivalent 4-NC block is the \u003cb data-path-to-node=\"13,3,0\" data-index-in-node=\"185\"\u003e3RH1911-1FA04\u003c\/b\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"R.A.M. Parts","offers":[{"title":"Default Title","offer_id":48120298340504,"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_379a7a8c-3edf-4665-80b9-1f06a904fb2f.jpg?v=1771368171","url":"https:\/\/parts4rem.ca\/products\/siemens-3rh2911-1fa04-contacter-auxiliary","provider":"Parts4REM","version":"1.0","type":"link"}