{"product_id":"1790d-n4c0-allen-bradley-4-channel-analog-current-input-module","title":"1790D-N4C0 Allen-Bradley 4-Channel Analog Current Input Module","description":"\u003ch2\u003e\u003cstrong\u003e1790D-N4C0 4‑channel Analog Current Input Module by Allen‑Bradley\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3\u003eKey Technical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \u0026amp; Series:\u003c\/strong\u003e Allen‑Bradley CompactBlock LDX series – model \u003cstrong\u003e1790D-N4C0\u003c\/strong\u003e analog input module.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Channels:\u003c\/strong\u003e Four single‑ended, non‑isolated channels; software‑configurable for 4…20 mA (default) or 0…20 mA.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResolution \u0026amp; Data:\u003c\/strong\u003e 12‑bit unipolar resolution (3.90 µA\/bit for 4…20 mA, 4.88 µA\/bit for 0…20 mA) with binary data format 0000 to 0FFF.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy \u0026amp; Speed:\u003c\/strong\u003e Overall accuracy ±0.2 % full scale @ 0…55 °C; conversion time 10 ms per channel (40 ms for all four).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Impedance \u0026amp; Isolation:\u003c\/strong\u003e 249 Ω input impedance; photocoupler isolation between I\/O and logic (1250 V AC rms tested).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Requirements:\u003c\/strong\u003e DeviceNet supply 24 V DC nom (11…28.8 V DC, 1.2 W max); field power 24 V DC nom (21.6…26.4 V DC, 1.5 W max).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndicators \u0026amp; Wiring:\u003c\/strong\u003e Four red\/green I\/O status LEDs; connection via 37‑pin D‑shell female connector.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpansion Capability:\u003c\/strong\u003e This analog base module supports up to two discrete expansion modules directly attached.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMechanical \u0026amp; Environmental Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsulation Resistance:\u003c\/strong\u003e Minimum 20 MΩ at 250 V DC between insulated circuits ensures stable isolation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e Full accuracy from 0…55 °C makes it suitable for industrial cabinet environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNon‑Isolated Sections:\u003c\/strong\u003e DeviceNet to logic and field power are non‑isolated – follow proper grounding practices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpace‑Saving Design:\u003c\/strong\u003e Four high‑resolution inputs in one housing with expansion capability reduces panel footprint.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDoes the 1790D-N4C0 support both 4…20mA and 0…20mA inputs?\u003c\/strong\u003e Yes, you can configure each channel via software for either 4…20 mA (default) or 0…20 mA range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat is the input impedance of each channel?\u003c\/strong\u003e Each analog input presents 249 Ω to the loop – compatible with most transmitters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHow fast does the module read all four channels?\u003c\/strong\u003e Conversion takes 10 ms per channel, so a complete scan of four inputs requires 40 ms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIs field calibration required for the 1790D-N4C0?\u003c\/strong\u003e No calibration needed – the module ships factory‑calibrated and maintains accuracy over temperature.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCan I add expansion modules to this analog base?\u003c\/strong\u003e Yes, you can attach up to two discrete expansion modules directly to this base unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat isolation does the module provide?\u003c\/strong\u003e Photocoupler isolation between I\/O and logic (1250 V AC), but DeviceNet and field power are non‑isolated.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor inquiries or volume discounts, contact our team at \u003ca href=\"mailto:sales@nex-auto.com\"\u003esales@nex-auto.com\u003c\/a\u003e or via WhatsApp \u003ca href=\"https:\/\/wa.me\/8615392429628\" target=\"_blank\"\u003e+86 153 9242 9628\u003c\/a\u003e. \u003cbr\u003ePartner website: \u003ca href=\"https:\/\/www.nex-auto.com\/\" target=\"_blank\"\u003eNexAuto Technology Limited\u003c\/a\u003e\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45826897510561,"sku":"1790D-N4C0","price":248.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0673\/5390\/3265\/files\/1790D-N4C0.jpg?v=1780975595","url":"https:\/\/www.autonexcontrol.com\/fr\/products\/1790d-n4c0-allen-bradley-4-channel-analog-current-input-module","provider":"AutoNex Controls Limited ","version":"1.0","type":"link"}