{"product_id":"2mll-ch2a-honeywell-serial-communication-module","title":"2MLL-CH2A | Honeywell | Serial Communication Module","description":"\u003ch2\u003eHoneywell 2MLL-CH2A Serial Communication Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eHoneywell 2MLL‑CH2A\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e2MLL‑CH2A\u003c\/strong\u003e serial communication module, provides dual‑channel RS232C and RS422\/485 communication for MasterLogic systems. It executes asynchronous serial transmission with configurable framing, baud rates, and diagnostic monitoring.\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\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003e2MLL-CH2A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e119 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCore Performance Indicators\u003c\/th\u003e\n\u003ctd\u003e1 ch RS232C, 1 ch RS422\/485, modem support on RS232C, asynchronous communication, up to 115200 bps, photo‑coupler isolation, auto‑scan diagnostics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eSerial Interface \u0026amp; Protocol Configuration\u003c\/h3\u003e\n\u003cp\u003eThe module supports one RS232C channel and one RS422\/485 channel. RS232C allows modem connection for remote communication. All communication parameters are configured through \u003cstrong\u003eSoftMaster‑NM\u003c\/strong\u003e, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStart bit: 1\u003c\/li\u003e\n\u003cli\u003eData bits: 7 or 8\u003c\/li\u003e\n\u003cli\u003eStop bits: 1 or 2\u003c\/li\u003e\n\u003cli\u003eParity: odd, even, or none\u003c\/li\u003e\n\u003cli\u003eBaud rate options: 300 \/ 600 \/ 1200 \/ 2400 \/ 4800 \/ 9600 \/ 19200 \/ 38400 \/ 57600 \/ 115200 bps\u003c\/li\u003e\n\u003cli\u003eSynchronization: asynchronous\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eTransmission distance is specified as \u003cstrong\u003e15 m for RS232C\u003c\/strong\u003e (extendable via modem) and \u003cstrong\u003e500 m max for RS422\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eNetwork Diagnostics \u0026amp; LED Indicators\u003c\/h3\u003e\n\u003cp\u003eDiagnostic functions include auto‑scan, frame monitor, link monitor, and loop‑back testing. LED indicators provide real‑time status:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRUN\u003c\/li\u003e\n\u003cli\u003eI\/F\u003c\/li\u003e\n\u003cli\u003eTX\u003c\/li\u003e\n\u003cli\u003eRX\u003c\/li\u003e\n\u003cli\u003eERR\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese indicators support rapid identification of communication faults or link instability.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the RS232C port connect directly to a modem A: Yes. Modem connection is supported only on the RS232C channel.\u003c\/p\u003e\n\u003cp\u003eQ: How far can RS422 communication be extended A: Up to 500 m maximum, as specified.\u003c\/p\u003e\n\u003cp\u003eQ: Are communication parameters configurable per channel A: Yes. All framing and baud rate settings are adjustable through SoftMaster‑NM.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eRoute RS232C and RS422\/485 cables separately from high‑current conductors to reduce noise. Maintain proper shielding and ground reference for long‑distance RS422 runs. Ensure connectors are fully seated before enabling communication. Use loop‑back and frame‑monitor diagnostics during commissioning to verify stable link performance.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":48211805339838,"sku":"2MLL-CH2A","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\/products\/2mll-ch2a-honeywell-serial-communication-module","provider":"AutoOilTech Limited","version":"1.0","type":"link"}