{"product_id":"1794-of8ih-isolated-8-channel-4-20ma-output-allen-bradley","title":"1794-OF8IH Isolated 8-Channel 4-20mA Output Allen-Bradley","description":"\u003ch2\u003e\u003cstrong\u003e1794-OF8IH Allen-Bradley Flex I\/O Isolated HART Analog Output Module\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan class=\"highlight\"\u003eEight isolated outputs\u003c\/span\u003e offer independent configuration for 0‑20 mA or 4‑20 mA. Each channel avoids ground loops and interference.\u003c\/li\u003e\n\u003cli\u003eModule resolution reaches \u003cstrong\u003e16 bits (unipolar)\u003c\/strong\u003e. Actual resolution equals 0.305 µA per count for fine current control.\u003c\/li\u003e\n\u003cli\u003eConversion method uses a \u003cstrong\u003e16‑bit digital‑to‑analog converter\u003c\/strong\u003e. Conversion rate runs at \u003cstrong\u003e10 ms\u003c\/strong\u003e for fast updates.\u003c\/li\u003e\n\u003cli\u003eChannel settling time equals \u003cstrong\u003e70 ms\u003c\/strong\u003e. This ensures stable output after a change.\u003c\/li\u003e\n\u003cli\u003eData formats include \u003cstrong\u003eEngineering Units, Percent of Full Scale, and RAW\/Proportional Count\u003c\/strong\u003e. You program each channel independently.\u003c\/li\u003e\n\u003cli\u003eThe module detects lead breakages. It also triggers alarms for overrange and underrange current conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo external power supply\u003c\/strong\u003e is required for operation. The module draws FlexBus current of 80 mA at 5V DC.\u003c\/li\u003e\n\u003cli\u003eMaximum power dissipation equals \u003cstrong\u003e5.0 W @ 24V DC\u003c\/strong\u003e. Thermal dissipation reaches \u003cstrong\u003e17.06 BTU\/hr @ 24V DC\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eOperating temperature ranges from \u003cstrong\u003e32°F to 131°F (0°C to 55°C)\u003c\/strong\u003e. This suits most industrial environments.\u003c\/li\u003e\n\u003cli\u003eThe module supports \u003cstrong\u003epass‑through messages\u003c\/strong\u003e with 1 or 2 connections. Each connection handles 8 queues for HART communication.\u003c\/li\u003e\n\u003cli\u003eA dedicated \u003cstrong\u003e6‑WORD register\u003c\/strong\u003e stores HART data. It includes Field Device status, HART Communication, Loop Status, and primary value in IEEE 754‑1985 32‑bit float.\u003c\/li\u003e\n\u003cli\u003eFactory calibration eliminates manual adjustments. No jumpers or switches are needed for setup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTerminal Base \u0026amp; Installation Requirements\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUse terminal bases \u003cstrong\u003e1794-TB3\u003c\/strong\u003e or \u003cstrong\u003e1794-TB3S\u003c\/strong\u003e with this module. These bases provide secure connections for field wiring.\u003c\/li\u003e\n\u003cli\u003eSet the keyswitch to \u003cstrong\u003eposition 4\u003c\/strong\u003e when installing the \u003cstrong\u003e1794-OF8IH\u003c\/strong\u003e. This locks the module to the terminal base properly.\u003c\/li\u003e\n\u003cli\u003eMount the module on a DIN rail or panel. The Flex I\/O system allows easy snap‑on installation.\u003c\/li\u003e\n\u003cli\u003eWire type depends on your chosen terminal base. Follow standard analog signal wiring practices for best noise immunity.\u003c\/li\u003e\n\u003cli\u003eAllow proper ventilation around the module. Keep ambient temperature within 0°C to 55°C (32°F to 131°F).\u003c\/li\u003e\n\u003cli\u003eThe module communicates through the FlexBus. No separate external 24V DC supply is needed for the outputs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Is the 1794-OF8IH a genuine Allen‑Bradley new module?\u003c\/strong\u003e\u003cbr\u003eA: Yes, we supply \u003cstrong\u003e100% brand new and original\u003c\/strong\u003e Allen‑Bradley 1794-OF8IH modules. No used or imitation products.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What terminal bases work with the 1794-OF8IH?\u003c\/strong\u003e\u003cbr\u003eA: This module fits \u003cstrong\u003e1794-TB3\u003c\/strong\u003e and \u003cstrong\u003e1794-TB3S\u003c\/strong\u003e terminal bases. Use keyswitch position 4 for proper installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Does the 1794-OF8IH require an external 24V DC power supply?\u003c\/strong\u003e\u003cbr\u003eA: No, the module draws power from the FlexBus (80 mA @ 5V DC). No external supply is needed for operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What is the conversion rate and resolution?\u003c\/strong\u003e\u003cbr\u003eA: Conversion rate is \u003cstrong\u003e10 ms\u003c\/strong\u003e using a 16‑bit DAC. Resolution equals 16 bits unipolar or 0.305 µA per count.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Does the module support HART communication?\u003c\/strong\u003e\u003cbr\u003eA: Yes, the \u003cstrong\u003e1794-OF8IH\u003c\/strong\u003e provides HART pass‑through messaging. It uses a dedicated 6‑word register for HART data including primary variable in IEEE 32‑bit float.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Do you have stock available? How long until delivery?\u003c\/strong\u003e\u003cbr\u003eA: Yes, we keep \u003cstrong\u003estock on hand\u003c\/strong\u003e. Shipment occurs within 5 days after order. Delivery time depends on your location and chosen courier (FedEx, UPS, DHL).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What is the return policy?\u003c\/strong\u003e\u003cbr\u003eA: We offer \u003cstrong\u003e30 days return\u003c\/strong\u003e from delivery date. Items must be unused and in original packaging. Contact us for RMA authorization.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Can I calibrate the 1794-OF8IH manually?\u003c\/strong\u003e\u003cbr\u003eA: The module ships factory calibrated. No field calibration is required. Jumpers and switches are not needed for configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What alarms does the module provide?\u003c\/strong\u003e\u003cbr\u003eA: It detects lead breakages and generates alarms for overrange and underrange current conditions. This enhances diagnostic capability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eContact Information Inquiries:\u003c\/strong\u003e \u003ca href=\"mailto:sales@nex-auto.com\"\u003esales@nex-auto.com\u003c\/a\u003e | \u003ca rel=\"noopener noreferrer\" href=\"https:\/\/wa.me\/8615392429628\" target=\"_blank\"\u003e+86 153 9242 9628\u003c\/a\u003e (WhatsApp)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePartner:\u003c\/strong\u003e \u003ca rel=\"noopener noreferrer\" 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":46436820910241,"sku":"1794-OF8IH","price":253.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0673\/5390\/3265\/files\/1794-OF8IH.jpg?v=1778832102","url":"https:\/\/www.autonexcontrol.com\/ru\/products\/1794-of8ih-isolated-8-channel-4-20ma-output-allen-bradley","provider":"AutoNex Controls Limited ","version":"1.0","type":"link"}