{"product_id":"allen-bradley-1794-of8ih-flex-i-o-analog-output-module","title":"Allen-Bradley 1794-OF8IH Flex I\/O Analog Output Module","description":"\u003cp\u003eConfigured for precision process control in distributed I\/O architectures, the \u003cstrong\u003eAllen-Bradley 1794-OF8IH\u003c\/strong\u003e (\u003cstrong\u003e1794-OF8IH\u003c\/strong\u003e) Flex IO Isolated Analog Output HART Module provides direct physical\/electrical execution of eight independent current output channels.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1794-OF8IH\u003c\/strong\u003e: Base Flex I\/O module with 8 isolated analog output channels supporting HART protocol.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1794-TB3 \/ 1794-TB3S\u003c\/strong\u003e: Compatible terminal base options for field wiring termination.\u003c\/li\u003e\n\u003c\/ul\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\u003e1794-OF8IH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.17 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eNot Specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e5.0 W @ 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channels\u003c\/td\u003e\n\u003ctd\u003e8 (Isolated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Range\u003c\/td\u003e\n\u003ctd\u003e0-20 mA \/ 4-20 mA\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\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e1794-OF8IH\u003c\/strong\u003e supports the HART protocol on all eight isolated output channels, enabling bi-directional communication with intelligent field devices. Each channel provides channel-to-channel isolation, preventing common-mode interference between disparate loops. The module utilizes a 16-bit digital-to-analog converter with a 10 ms conversion rate, ensuring rapid output updates for demanding process applications. Firmware flash compatibility is supported via the Flexbus communication interface, allowing for integrated configuration and maintenance of HART-enabled transmitters or actuators directly through the control system network.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1794-OF8IH support hot-swapping within the Flex I\/O backplane?\u003c\/p\u003e\n\u003cp\u003eA: Yes, the module supports removal and insertion under power (RIUP) when mounted on a compatible 1794 terminal base, provided the rack power is active and the system configuration accounts for temporary signal loss.\u003c\/p\u003e\n\u003cp\u003eQ: Is external isolation required between channels?\u003c\/p\u003e\n\u003cp\u003eA: No. The 1794-OF8IH provides galvanic isolation between each of the eight output channels, eliminating the requirement for external signal isolators in most standard loop configurations.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eEnsure the compatible 1794-TB3 or 1794-TB3S terminal base is securely mounted to the DIN-rail.\u003c\/li\u003e\n\u003cli\u003eAlign the module with the terminal base and rotate into position until the mechanical latch secures the connection to the Flexbus.\u003c\/li\u003e\n\u003cli\u003eTerminate field loop wiring to the terminal base, ensuring correct polarity for the 0-20 mA \/ 4-20 mA output circuits.\u003c\/li\u003e\n\u003cli\u003eRoute output signal cabling through dedicated shielded conduits or wireways, keeping them separated from high-voltage AC or motor drive power cables to minimize induced noise.\u003c\/li\u003e\n\u003cli\u003eTerminate all cable shields to a single, low-impedance earth ground at the cabinet entry to prevent ground loop currents.\u003c\/li\u003e\n\u003cli\u003eVerify channel configuration and loop integrity via the PLC programming environment after power-up; ensure the output mode matches the connected field device requirements.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":53515425579192,"sku":"1794-OF8IH","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/1794-OF8IH.jpg?v=1779861244","url":"https:\/\/www.globalpetroparts.com\/products\/allen-bradley-1794-of8ih-flex-i-o-analog-output-module","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}