{"product_id":"2mlf-ac4h-honeywell-hart-analog-input-module","title":"2MLF-AC4H | Honeywell | HART Analog Input Module","description":"\u003ch2\u003eHoneywell 2MLF‑AC4H HART Analog Input Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for HART‑enabled analog acquisition in HC900\/ControlEdge networks, the \u003cstrong\u003eHoneywell 2MLF‑AC4H\u003c\/strong\u003e (\u003cstrong\u003e2MLF‑AC4H\u003c\/strong\u003e HART analog input module) provides direct multi‑channel current\/voltage measurement with integrated HART digital signal extraction across the backplane.\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\u003e2MLF‑AC4H\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\u003eHC900 \/ ControlEdge I\/O Platform\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating Temp\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower Consumption\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eHART Analog Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eChannels\u003c\/th\u003e\n\u003ctd\u003e4 analog input channels (HART‑enabled)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSignal Types\u003c\/th\u003e\n\u003ctd\u003eCurrent\/voltage analog inputs with HART overlay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eData Handling\u003c\/th\u003e\n\u003ctd\u003eAnalog value + HART digital variable extraction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIsolation Method\u003c\/th\u003e\n\u003ctd\u003ePhoto‑coupler isolation between input terminal and PLC power (no channel‑to‑channel isolation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTerminal Block\u003c\/th\u003e\n\u003ctd\u003eNot specified (standard MLF‑series terminal block assumed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConversion Speed\u003c\/th\u003e\n\u003ctd\u003eNot specified (MLF analog modules typically 250–500 µs\/channel)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAbsolute Max Input\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003e4‑20 mA HART Loop Protocol and Channel Isolation Behavior\u003c\/h3\u003e\n\u003cp\u003eThe 2MLF‑AC4H is designed specifically for \u003cstrong\u003e4‑20 mA HART\u003c\/strong\u003e loop acquisition. The module extracts both the analog process variable and the HART digital secondary variables. Internal architecture uses \u003cstrong\u003ephoto‑coupler isolation\u003c\/strong\u003e between input terminals and PLC power, while HC900 I\/O maintains \u003cstrong\u003echannel‑to‑channel isolation\u003c\/strong\u003e at the system level to prevent cross‑loop interference. This ensures stable HART communication even under mixed analog\/HART channel configurations.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can the 2MLF‑AC4H be hot‑swapped during operation?\u003c\/strong\u003e A: No. The module must be inserted or removed only when the controller rack is de‑energized.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does HART communication affect analog scan timing?\u003c\/strong\u003e A: Analog values update at standard module conversion speed. HART digital variables update at slower, protocol‑defined intervals without affecting analog refresh.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can each channel operate as non‑HART analog input?\u003c\/strong\u003e A: Yes. Channels can be configured for standard analog measurement when HART extraction is not required.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUse shielded twisted‑pair wiring for HART loops and bond shields at a single termination point.\u003c\/li\u003e\n\u003cli\u003eAvoid routing HART wiring near high‑frequency digital outputs to reduce electromagnetic coupling.\u003c\/li\u003e\n\u003cli\u003eVerify loop impedance and device polling configuration before commissioning.\u003c\/li\u003e\n\u003cli\u003eEnsure proper seating of the terminal block before energizing the rack.\u003c\/li\u003e\n\u003cli\u003eMaintain loop current within the module’s supported analog input range.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":48207224668350,"sku":"2MLF-AC4H","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/2MLF-AC8A_7c799b81-5a26-438a-bff7-89c44d34933c.png?v=1784280831","url":"https:\/\/www.autooiltech.com\/ar\/products\/2mlf-ac4h-honeywell-hart-analog-input-module","provider":"AutoOilTech Limited","version":"1.0","type":"link"}