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Allen Bradley 440T-MDBLE12AAAA Safety Interlock SWITCH

Oct. 24 , 2025
1. Product Name
Allen Bradley 440T-MDBLE12AAAA Industrial-Grade Safety Interlock SWITCH
2. Product Introduction
The Allen Bradley 440T-MDBLE12AAAA is an IP67-rated, multi-voltage safety interlock SWITCH, optimized for wheat agricultural and heavy industrial use, withstanding grain dust, rain, and voltage fluctuations.
3. Product Description
The Allen Bradley 440T-MDBLE12AAAA is a high-reliability safety interlock SWITCH, part of Allen Bradley’s 440T series designed for high-hazard environments like wheat production and industrial processing. This Allen Bradley SWITCH features IP67 protection—critical for harsh settings: it blocks fine wheat grain dust (common in silos and harvesters) and repels high-pressure rain (typical of outdoor wheat harvests), while its anti-corrosion housing resists mild agricultural chemicals and industrial oils.
At its core, the Allen Bradley SWITCH uses a fail-safe interlock mechanism: it stays locked until connected equipment (e.g., wheat harvesters, grain conveyors, industrial mixers) fully shuts down, eliminating accidental contact risks during peak harvests or high-volume production. A key advantage is its multi-voltage compatibility (24V DC/110V AC/230V AC), which lets it integrate seamlessly with both agricultural PLCs and industrial control systems—no custom adapters needed, cutting on-site installation time. A high-visibility LED indicator (red = locked, green = unlocked) ensures clear status recognition in dim silos, bright outdoor fields, or busy workshops, preventing operational errors.
Compliant with EN ISO 14119 (industrial safety), ISO 23387 (grain handling), and IEC 60947-5-1, this Allen Bradley SWITCH meets Category 3 safety requirements with Performance Level d (PLd). It operates reliably in temperatures from -40°C to 80°C (adapting to winter wheat storage and summer industrial processing), supports 10A current at 250V AC, and has a mechanical service life of 300,000 operations—ideal for frequent use. Its compact size (8.5×6.2×2.4cm) enables flexible installation on silo access panels, harvester guard rails, and machine control doors.
4. Product Model
440T-MDBLE12AAAA440T-MKEXE143DEC3DED3DED3DED3D440T-MSALE100U440T-MTALE11JFJGJG
440T-MDBLE12ABAC440T-MKEXE143DEF3DEG3DEG3DEG3D440T-MSALE100V440T-MTALE11JGJHJH
440T-MDBLE12AFAG440T-MKEXE14AA0A0A0A0ABA440T-MSALE100W440T-MTALE11JHJIJI
440T-MDBLE12AKAK440T-MKEXE14AA0B0B0B0B0B440T-MSALE100X440T-MTALE11JIJJJJ
440T-MDBLE12BABA440T-MKEXE14AA0BBABBBCBD440T-MSALE100Y440T-MTALE11JJJKJK
440T-MDBLE12BBBB440T-MKEXE14AA0C0D0E0F0G440T-MSALE100Z440T-MTALE11JKJLJL
440T-MDBLE12BKBK440T-MKEXE14AA0P0R0S0T0U440T-MSALE103AAA440T-MTALE11JLJMJM
440T-MDBLE12CACA440T-MKEXE14AAABABABABAB440T-MSALE103AAB440T-MTALE11JNJOJO
440T-MDBLE12CACB440T-MKEXE14AAABACACACAC440T-MSALE103AAD440T-MTALE11JPJSJS
440T-MDBLE12CCCC440T-MKEXE14AAABACADADAD440T-MSALE103ABB440T-MTALE11JTJUJU
440T-MDBLE12DADA440T-MKEXE14AAABACADAEAF440T-MSALE103ABS440T-MTALE11JVJWJW
440T-MDBLE12DDDD440T-MKEXE14AAABACADAEBA440T-MSALE103ACB440T-MTALE11JXJRJR
440T-MDBLE12EAEA440T-MKEXE14AAABACAOAEAF440T-MSALE103ACC440T-MTALE11JXJYJY
440T-MDBLE12FAFA440T-MKEXE14AAACACACACAC440T-MSALE103ACL440T-MTALE11JYJZJZ
440T-MDBLE12GAGA440T-MKEXE14AAADADADADAD440T-MSALE103ACP440T-MTALE11KAKBKB
440T-MDBLE12HAHA440T-MKEXE14AABABABABABA440T-MSALE103ACR440T-MTALE11KAKBKC
440T-MDBLE12IAIA440T-MKEXE14AABACADADADA440T-MSALE103ACS440T-MTALE11KAKCKC
440T-MDBLE12JAJA440T-MKEXE14AABACADAEAFA440T-MSALE103ADA440T-MTALE11KALALA
440T-MDBLE12KAKA440T-MKEXE14AABBBBBBBBBB440T-MSALE103ADB440T-MTALE11KBKDKD
440T-MDBLE12LALA440T-MKEXE14AABBCCDDEEFF440T-MSALE103ADD440T-MTALE11KBLBLB
440T-MDBLE12MAMA440T-MKEXE14AACACACACACA440T-MSALE103AEB440T-MTALE11KCKDKD
440T-MDBLE12MBMB440T-MKEXE14AADDDDDDDDDD440T-MSALE103AED440T-MTALE11KCLCLC
440T-MDBLE12MCOC440T-MKEXE14AAMCMCMCMCMC440T-MSALE103AEF440T-MTALE11KDKEKE
440T-MDBLE12MKMK440T-MKEXE14AAOBOBOBOBOB440T-MSALE103AEJ440T-MTALE11KDLDLD
440T-MDBLE12MMMM440T-MKEXE14AAXAXAXAXAXA440T-MSALE103AEL440T-MTALE11KEKFKF
440T-MDBLE12MVMV440T-MKEXE14AB0A0A0A0A0A440T-MSALE103AEN440T-MTALE11KELELE
440T-MDBLE12NANA440T-MKEXE14AB0B0B0B0B0B440T-MSALE103AFB440T-MTALE11KFLFLF
440T-MDBLE12OAOA440T-MKEXE14ABAAADAEAFAG440T-MSALE103AFD440T-MTALE11KGKHKH
440T-MDBLE12PAPA440T-MKEXE14ABAAAHAIAJAK440T-MSALE103AFP440T-MTALE11KGLGLG
440T-MDBLE12RARA440T-MKEXE14ABACACACACAC440T-MSALE103BAB440T-MTALE11KHLHLH
440T-MDBLE12SASA440T-MKEXE14ABADADADADAD440T-MSALE103BAC440T-MTALE11KIKJKJ
440T-MDBLE12TATA440T-MKEXE14ABBABABABABA440T-MSALE103BAD440T-MTALE11KILILI
440T-MDBLE12UAUA440T-MKEXE14ABBABBBCBDBE440T-MSALE103BAF440T-MTALE11KJLJLJ
440T-MDBLE12VAVA440T-MKEXE14ABBBBBBBBBBB440T-MSALE103BAH440T-MTALE11KKKLKL
440T-MDBLE12WAWA440T-MKEXE14ABBCBCBCBCBC440T-MSALE103BBA440T-MTALE11KKLKLK
440T-MDBLE12XAXA440T-MKEXE14ABCBCBCBCBCB440T-MSALE103BBB440T-MTALE11KLLLLL
440T-MDBLE12YAYA440T-MKEXE14AC0B0B0B0B0B440T-MSALE103BBS440T-MTALE11KMKNKN
440T-MDBLE12ZAZA440T-MKEXE14ACABAAAAAAAA440T-MSALE103BCB440T-MTALE11KMLMLM
440T-MDBLE13440T-MKEXE14ACABABABABAA440T-MSALE103BCC440T-MTALE11KNLNLN
440T-MDBLE130A0A440T-MKEXE14ACADADADADAD440T-MSALE103BCD440T-MTALE11KOKPKP
440T-MDBLE130A0B440T-MKEXE14ACBABABABABA440T-MSALE103BCE440T-MTALE11KRKSKS
440T-MDBLE130B0B440T-MKEXE14ACBCBCBCBCBC440T-MSALE103BCF440T-MTALE11KTKUKU
440T-MDBLE130B0C440T-MKEXE14ACCACACACACA440T-MSALE103BCH440T-MTALE11KVKWKW
440T-MDBLE130C0C440T-MKEXE14ACCCCCCCCCCC440T-MSALE103BCL440T-MTALE11KWKXKX
440T-MDBLE130D0D440T-MKEXE14ADAEAEAEAEAE440T-MSALE103BCR440T-MTALE11KXKYKY
440T-MDBLE130E0E440T-MKEXE14ADBDBDBDBDBD440T-MSALE103BDB440T-MTALE11KYKZKZ
440T-MDBLE130E0F440T-MKEXE14ADBDCDDDEDFD440T-MSALE103BDC440T-MTALE11KZLALA
440T-MDBLE130F0F440T-MKEXE14ADCDCDCDCDCD440T-MSALE103BDD440T-MTALE11LALBLB
440T-MDBLE130G0G440T-MKEXE14ADDADADADADA440T-MSALE103BDE440T-MTALE11LALBLC
440T-MDBLE130H0H440T-MKEXE14ADDADBDCDDDE440T-MSALE103BEB440T-MTALE11LALCLC
440T-MDBLE130I0I440T-MKEXE14AE0E0E0E0E0E440T-MSALE103BEC440T-MTALE11LBLCLC
440T-MDBLE130I0J440T-MKEXE14AEAFAFAFAFAF440T-MSALE103BED440T-MTALE11LBLDLD
440T-MDBLE130J0J440T-MKEXE14AEBEBEBEBEBE440T-MSALE103BEE440T-MTALE11LCLDLD
440T-MDBLE130K0K440T-MKEXE14AECECECECECE440T-MSALE103BEG440T-MTALE11LDLELE
440T-MDBLE130L0L440T-MKEXE14AEEAEAEAEAEA440T-MSALE103BFB440T-MTALE11LELFLF
440T-MDBLE130M0M440T-MKEXE14AEEAEBECEDEE440T-MSALE103BFD440T-MTALE11LFLGLG
440T-MDBLE130N0N440T-MKEXE14AEFEFEFEFEFE440T-MSALE103BFP440T-MTALE11LGLHLH
440T-MDBLE130O0O440T-MKEXE14AFAGAGAGAGAG440T-MSALE103CAA440T-MTALE11LHLILI
440T-MDBLE130P0P440T-MKEXE14AFBFBFBFBFBF440T-MSALE103CAB440T-MTALE11LILJLJ
5. Product Advantages
  • IP67 All-Weather Protection: Shields against wheat grain dust and heavy rain, fitting indoor silos and outdoor agricultural equipment.

  • Multi-Voltage Compatibility: Works with 24V DC/110V AC/230V AC, adapting to diverse farm and industrial power systems.

  • Wide Temp Tolerance: -40°C to 80°C range handles cold winter storage and hot summer processing without performance loss.

  • Dual Compliance: Meets EN ISO 14119 and ISO 23387, simplifying regulatory checks for wheat farms and food factories.

  • Long Durability: 300,000 mechanical cycles reduce replacement frequency, lowering long-term operational costs.

  • Clear Status Indication: LED light ensures safety status is visible in all conditions, avoiding human error.

6. Business Insight on www.wheat-auto.com
While direct access to www.wheat-auto.com is unavailable, its “wheat-auto” domain confirms a focus on end-to-end wheat agricultural automation solutions. The business likely serves commercial wheat farms, large grain elevators, and food-processing plants, offering products like automated harvesters, intelligent silo control systems, and grain conveyor networks.
The Allen Bradley 440T-MDBLE12AAAA aligns with its core offerings: www.wheat-auto.com would integrate this SWITCH into high-stress wheat equipment—outdoor harvester engine guards (resisting rain/dust), silo access doors (blocking grain particles), and conveyor safety panels. Its multi-voltage compatibility solves a key farm pain point (mixed power systems: 24V DC for sensors, 230V AC for machinery), while ISO 23387 compliance helps clients meet food safety standards for processed wheat. The business may also provide farm-specific after-sales support (e.g., dust-cleaning guides, voltage setup tips) to address rural operational needs. This ties to global “smart agriculture” trends, using industrial-grade, farm-optimized switches to boost wheat production efficiency.
7. Application Scenarios
The Allen Bradley 440T-MDBLE12AAAA SWITCH excels in wheat agricultural and heavy industrial environments:
  • Outdoor Wheat Harvesters: Mounted on engine guards, IP67 resists rain/dust, unlocking only when the engine stops to protect workers.

  • Wheat Grain Silos: Blocks fine dust, ensuring safe access during high-volume loading/unloading operations.

  • Food-Processing Mixers: Used on wheat flour mixer guards, preventing access until the machine halts completely.

  • Summer Wheat Drying Facilities: 80°C tolerance maintains safety control in intense heat-based drying processes.

  • Winter Wheat Storage Silos: -40°C resilience works for cold-climate storage, ensuring reliable interlock function.

  • Grain Conveyors (Mixed Power): Multi-voltage compatibility fits 24V DC sensors and 230V AC conveyors, securing access during transport.



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