{"product_id":"honeywell-mc-ghao21-51305869-175-analog-output-module","title":"Honeywell MC-GHAO21 51305869-175 Analog Output Module","description":"\u003cp\u003eThe \u003cstrong\u003eHoneywell 51305869-175\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eMC-GHAO21\u003c\/strong\u003e Analog Output Module, operates as a dedicated hardware component for high-precision analog current loop execution within Honeywell Series 8 and Experion PKS platforms. Engineered with 16 analog output points, the card converts digital controller commands into 4-20 mA signals to drive industrial actuators, control valves, and field positioning devices across the system 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\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\u003eMC-GHAO21 (51305869-175)\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 \/ Global Manufacturing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eApprox. 1.2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard Series 8 Rack Slot Frame\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 to +70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003ePower Supplied via System Rack Backplane\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eAnalog Output Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channels\u003c\/td\u003e\n\u003ctd\u003e16 Analog Output Points\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Range\u003c\/td\u003e\n\u003ctd\u003e4-20 mA Current Loop\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e+\/-0.05%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Accuracy\u003c\/td\u003e\n\u003ctd\u003e+\/-0.35% Calibrated at 25 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Load\u003c\/td\u003e\n\u003ctd\u003e750 ohm @ 22 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Ripple\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;=100 mV Peak-to-Peak across 250 ohm Load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003eChannel-to-System Galvanic Isolation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRedundancy\u003c\/td\u003e\n\u003ctd\u003eFail-Safe Relay Isolation Supported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDCS Process Control \u0026amp; Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe MC-GHAO21 Analog Output Module delivers continuous 4-20 mA current loops utilizing dynamic channel-to-system galvanic isolation to suppress common-mode ground loops and electrical interference. Designed for tight integration with the 4-20 mA HART loop protocol layer, the internal digital-to-analog converter stage maintains an output resolution of +\/-0.05% with an output ripple under 100 mV peak-to-peak across a 250 ohm load.\u003c\/p\u003e\n\u003cp\u003eThe module supports redundant configuration paired with fail-safe relay isolation to preserve loop control integrity during secondary card maintenance. Operating across an extended temperature envelope of -20 to +70 deg C, the assembly maintains an absolute calibrated output accuracy of +\/-0.35% under variable process cabinet thermal loads.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the MC-GHAO21 module support online hot-swapping during live rack operations?\u003c\/p\u003e\n\u003cp\u003eA: Yes. The hardware design allows live card removal and insertion within the Series 8 rack carrier without interrupting power to adjacent I\/O slots or dropping communications on the primary DCS bus.\u003c\/p\u003e\n\u003cp\u003eQ: What is the maximum resistive loop load supported on each 4-20 mA output channel?\u003c\/p\u003e\n\u003cp\u003eA: Each individual analog output channel drives up to a maximum load impedance of 750 ohm at a 22 mA current limit.\u003c\/p\u003e\n\u003cp\u003eQ: How does the module handle output execution during a dual-redundancy failure state?\u003c\/p\u003e\n\u003cp\u003eA: Integrated fail-safe relay isolation open-circuits or holds designated output states according to configured fail-safe options, preventing uncalibrated loop commands from reaching connected field devices.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRack Slot Alignment\u003c\/strong\u003e: Align the 1.2 kg module card edge with the Series 8 backplane guide rails, sliding the assembly until the backplane connectors seat completely and top retaining screws are tightened.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShield Grounding Infrastructure\u003c\/strong\u003e: Connect field cable drain wires to the designated terminal block earth bar at the Field Termination Assembly (FTA), keeping the field actuator housing insulated to avoid ground potential loops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLoop Load Resistance Verification\u003c\/strong\u003e: Ensure total field wiring loop resistance and actuator load impedance do not exceed 750 ohm at 22 mA drive levels prior to energizing the loop power supply.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":52386123448616,"sku":"MC-GHAO21 51305869-175","price":315.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0827\/6266\/2184\/files\/MC-PAOY2280363969-15080364453-100__1_b1f89635-cc96-4f5d-95ce-60c14f2b5d12.jpg?v=1789548471","url":"https:\/\/www.powerdcs.com\/ar\/products\/honeywell-mc-ghao21-51305869-175-analog-output-module","provider":"Power DCS Parts Limited","version":"1.0","type":"link"}