{"product_id":"honeywell-ul08ao-iso-d25-analog-output-module","title":"Honeywell UL08AO-ISO-D25 Analog Output Module","description":"\u003cp\u003eThe \u003cstrong\u003eHoneywell UL08AO-ISO-D25\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eUL08AO-ISO-D25\u003c\/strong\u003e Analog Output Module, operates as a dedicated hardware component for driving 4-20 mA current loops within Honeywell process control platforms.\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\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\u003eUL08AO-ISO-D25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHoneywell\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\u003e0.59 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e355 mm x 158 mm x 87 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 deg C to +60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e24 VDC nominal (12.5 W maximum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channels\u003c\/td\u003e\n\u003ctd\u003e8 analog current outputs (4-20 mA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Type\u003c\/td\u003e\n\u003ctd\u003eChannel-to-channel galvanic and optical isolation\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 \u0026amp; Channel-to-Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe UL08AO-ISO-D25 converts digital control values from the primary controller backplane into 8 isolated 4-20 mA current outputs to drive actuators, positioners, and control valves. Individual channel-to-channel galvanic and optical isolation prevents field ground loops and suppresses electrical transients from propagating back to system logic boards. Integrated short-circuit protection limits output fault current per channel, while real-time LED diagnostics provide immediate visual verification of loop current integrity and open-circuit status.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What happens to the 4-20 mA outputs if the module loses backplane bus communication with the primary controller?\u003c\/p\u003e\n\u003cp\u003eA: Upon detection of a backplane communication timeout, each output channel transitions to a user-configured fail-safe condition (either hold-last-value or zero-scale 4 mA output) to prevent unpredictable actuator motion.\u003c\/p\u003e\n\u003cp\u003eQ: Can an individual 4-20 mA output channel withstand a sustained short circuit on its field terminals?\u003c\/p\u003e\n\u003cp\u003eA: Yes. Each channel features internal active current limiting hardware that maintains signal protection during an accidental short circuit without causing thermal damage or affecting adjacent channel outputs.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eDIN-Rail Mounting\u003c\/strong\u003e: Snap the module secure housing onto a standard 35 mm DIN rail, ensuring top and bottom metal retention clips lock fully into position.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring Clearance\u003c\/strong\u003e: Maintain a minimum 50 mm wiring duct separation between 4-20 mA analog output field cables and high-voltage AC power cables to prevent electromagnetic noise induction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShield Termination\u003c\/strong\u003e: Terminate field cable drain wires at the designated cabinet grounding bar using a single-point connection to eliminate circulating ground loop currents.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiagnostic Check\u003c\/strong\u003e: Verify that all channel status LED indicators illuminate green upon applying 24 VDC auxiliary loop power prior to putting the outputs into active control modes.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":67653519180085,"sku":"UL08AO-ISO-D25","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/UL08AO-ISO-D25_Cocoai.png?v=1791431567","url":"https:\/\/www.5gplc.com\/products\/honeywell-ul08ao-iso-d25-analog-output-module","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}