{"product_id":"siemens-3rh2921-1ga40-contacter-auxiliary","title":"Siemens 3RH2921-1GA40 Auxiliary Contact Block","description":"\u003cp data-path-to-node=\"1\"\u003eThe \u003cb data-path-to-node=\"1\" data-index-in-node=\"4\"\u003eSiemens 3RH2921-1GA40\u003c\/b\u003e is a 4-pole, \u003cb data-path-to-node=\"1\" data-index-in-node=\"39\"\u003eside-mounted\u003c\/b\u003e auxiliary contact block from the \u003cb data-path-to-node=\"1\" data-index-in-node=\"85\"\u003eSIRIUS Innovations\u003c\/b\u003e series. In the Canadian elevator industry, this side-mount version is the go-to choice for \u003cb data-path-to-node=\"1\" data-index-in-node=\"195\"\u003eMRL (Machine Room-Less)\u003c\/b\u003e controllers or shallow cabinets where there is not enough \"depth\" clearance to snap an auxiliary block onto the front of the contactor.\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 \u003cb data-path-to-node=\"3,1,0\" data-index-in-node=\"10\"\u003eSide-mounted\u003c\/b\u003e (Snaps onto the left or right side of the contactor)\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\"\u003e4 NO \/ 0 NC\u003c\/b\u003e (Four Normally Open 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\"\u003eCompatibility:\u003c\/b\u003e Designed for \u003cb data-path-to-node=\"3,3,0\" data-index-in-node=\"28\"\u003e3RT2\u003c\/b\u003e contactors and \u003cb data-path-to-node=\"3,3,0\" data-index-in-node=\"48\"\u003e3RH2\u003c\/b\u003e relays (Sizes \u003cb data-path-to-node=\"3,3,0\" data-index-in-node=\"67\"\u003eS0 to S3\u003c\/b\u003e)\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\"\u003eElevator Logic Applications (4 NO)\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp data-path-to-node=\"6\"\u003eThe \"40\" suffix indicates a high-density Normally Open configuration. Because it lacks NC contacts, it is not used for \"Welded Contact\" monitoring; instead, it is used for \u003cb data-path-to-node=\"6\" data-index-in-node=\"172\"\u003eoperational signaling\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\"\u003eParallel Logic Signaling:\u003c\/b\u003e Providing independent \"Contactor Picked\" signals to the \u003cb data-path-to-node=\"7,0,0\" data-index-in-node=\"82\"\u003eCPU\u003c\/b\u003e, the \u003cb data-path-to-node=\"7,0,0\" data-index-in-node=\"91\"\u003eBrake Control Board\u003c\/b\u003e, and the \u003cb data-path-to-node=\"7,0,0\" data-index-in-node=\"120\"\u003eVFD (Drive)\u003c\/b\u003e simultaneously.\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\"\u003eRedundant Seal-in:\u003c\/b\u003e Utilizing multiple NO contacts in a seal-in circuit to ensure a single dirty contact doesn't cause a \"contact chatter\" fault.\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\"\u003eAuxiliary Loads:\u003c\/b\u003e Triggering motor cooling fans or cabinet ventilation systems to run only when the hoist motor is energized.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,3,0\"\u003e\u003cb data-path-to-node=\"7,3,0\" data-index-in-node=\"0\"\u003eStatus Indicators:\u003c\/b\u003e Feeding 120V or 24V signals to external diagnostic lights or mechanical trip counters.\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\"\u003eLateral Profile:\u003c\/b\u003e By mounting to the side, the contactor remains \"slim\" in depth. This is critical when the controller cabinet is mounted in a narrow hoistway or door frame where the door would otherwise hit a front-mounted 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\"\u003eLeft\/Right Versatility:\u003c\/b\u003e This block is typically mounted on the left side of the contactor, but depending on the contactor size and configuration, it can be mirrored.\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\"\u003ePositive Linkage:\u003c\/b\u003e The block is physically actuated by the lateral stroke of the contactor’s internal carrier, ensuring the timing of the 4 NO contacts is perfectly synchronized with the main power poles.\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\"\u003eCabinet Clearance (MRL):\u003c\/b\u003e If you are performing a repair in a shallow cabinet, verify that adding this block (approx. 10mm width) doesn't interfere with adjacent DIN rail components like fuses or terminal blocks.\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\"\u003eTroubleshooting Signaling:\u003c\/b\u003e If the elevator is failing to \"recognize\" that the contactor has pulled in (e.g., the brake won't lift or the drive won't start), check these NO contacts. In dusty machine rooms, a high-resistance contact (\u0026gt;2 ohms) will fail to pass the logic signal to the CPU.\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 To prevent intermittent logic faults in high-vibration elevator environments, torque the screw terminals to \u003cb data-path-to-node=\"13,2,0\" data-index-in-node=\"125\"\u003e0.8–1.2 Nm\u003c\/b\u003e.\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\"\u003e3RT2 vs. 3RT1:\u003c\/b\u003e This is an \u003cb data-path-to-node=\"13,3,0\" data-index-in-node=\"26\"\u003eInnovations\u003c\/b\u003e series component. It will \u003cb data-path-to-node=\"13,3,0\" data-index-in-node=\"64\"\u003enot\u003c\/b\u003e fit the older \u003cb data-path-to-node=\"13,3,0\" data-index-in-node=\"82\"\u003e3RT1\u003c\/b\u003e (Legacy Sirius) contactors found in many older Canadian controllers. For legacy units, the side-mount equivalent is the \u003cb data-path-to-node=\"13,3,0\" data-index-in-node=\"207\"\u003e3RH1921\u003c\/b\u003e series.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"13,4,0\"\u003e\u003cb data-path-to-node=\"13,4,0\" data-index-in-node=\"0\"\u003eSafety Limitation:\u003c\/b\u003e Since this block has \u003cb data-path-to-node=\"13,4,0\" data-index-in-node=\"40\"\u003e0 NC contacts\u003c\/b\u003e, it cannot be used alone to satisfy Canadian B44 code requirements for \"Contactor Monitoring\" (which requires an NC contact for state feedback). It is usually paired with a front-mount or another side-mount block that contains NC contacts.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"R.A.M. Parts","offers":[{"title":"Default Title","offer_id":48120297750680,"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_bd9a6535-77c1-4fbe-8bba-fcc333933f45.jpg?v=1771368450","url":"https:\/\/parts4rem.ca\/products\/siemens-3rh2921-1ga40-contacter-auxiliary","provider":"Parts4REM","version":"1.0","type":"link"}