{"product_id":"honeywell-2mll-c42a-snet-serial-communication-module","title":"Honeywell 2MLL-C42A Snet Serial Communication Module","description":"\u003cp\u003eConfigured for multi-channel serial data exchange within Master-K or related industrial network platforms, the \u003cstrong\u003eHoneywell 2MLL-C42A\u003c\/strong\u003e (\u003cstrong\u003e2MLL-C42A\u003c\/strong\u003e Serial Communication Module) provides direct physical\/electrical execution. This dedicated interface component manages deterministic, point-to-point data synchronization pathways over long-distance topologies, converting internal backplane logic frames into differential electrical signals across dual independent paths.\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\u003e2MLL-C42A\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\u003eSouth Korea \/ United States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Weight\u003c\/td\u003e\n\u003ctd\u003e2.0 kg (Gross distribution weight profile)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eSlotted module layout matching standard system baseplates\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eSnet Serial Communication Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Interface\u003c\/td\u003e\n\u003ctd\u003eRS-422 differential transmission protocol\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Count\u003c\/td\u003e\n\u003ctd\u003e2 completely independent serial channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNetwork Protocol\u003c\/td\u003e\n\u003ctd\u003eSnet communication network standard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Strategy\u003c\/td\u003e\n\u003ctd\u003eDirect rack slot insertion with mechanical locking latch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProcess Control and DCS Metrics\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChannel-to-Channel Isolation and Differential Shielding:\u003c\/strong\u003e The module incorporates dual-channel isolated physical layers designed to separate communication paths. By enforcing strict channel-to-channel isolation parameters, the onboard circuitry blocks common-mode voltage offsets, ground loop currents, and cross-talk from migrating between the two independent RS-422 networks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-20 mA HART Loop Protocol and Serial Coexistence:\u003c\/strong\u003e While this module functions specifically as an RS-422 Snet data bridge rather than a direct analog termination board, its integrated filtering arrays prevent high-frequency digital serial square waves from inducing electromagnetic cross-talk into adjacent low-potential 4-20 mA HART instrumentation lines sharing the same enclosure conduits.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What are the maximum line length constraints for the RS-422 channels on the 2MLL-C42A?\u003c\/p\u003e\n\u003cp\u003eA: The RS-422 differential electrical signaling standard used by the Snet channels supports communication distances up to 1200 meters (approximately 4000 feet) without line repeaters. However, operating at maximum transmission distances requires high-quality twisted-pair conductors and proper end-of-line termination to minimize signal attenuation.\u003c\/p\u003e\n\u003cp\u003eQ: Is it necessary to install external terminal resistors across the RS-422 network lines?\u003c\/p\u003e\n\u003cp\u003eA: Yes. To suppress high-frequency wave reflections that cause data packet corruption, proper 120-ohm matching termination resistors must be connected across the differential Receive (RX) and Transmit (TX) line pairs at the physical start and end nodes of the RS-422 bus layout.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChassis Layout Alignment, Clearance Constraints, and Mechanical Seating:\u003c\/strong\u003e Insert the module housing straight into its assigned backplane slot, applying smooth pressure until the top and bottom structural locking clips engage fully with the rack frame. Maintain a clear 50 mm clearance perimeter around the module faceplate to prevent high temperature buildup near the internal serial communication transceivers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConductor Separation, Wireway Constraints, and Shield Grounding:\u003c\/strong\u003e Route all RS-422 Snet communication cables inside dedicated, grounded metal wireways completely separated from high-voltage AC lines or motor power conductors. Connect the outer braided shield layer of the serial cables straight to the cabinet's central copper ground bus bar at a single termination point to isolate the data lines from stray electromagnetic field noise.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":47903996969150,"sku":"2MLL-C42A","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/screenshot_2026-07-02_09-59-56.png?v=1782960373","url":"https:\/\/www.autooiltech.com\/es\/products\/honeywell-2mll-c42a-snet-serial-communication-module","provider":"AutoOilTech Limited","version":"1.0","type":"link"}