{"product_id":"1746-no8i-1746no8i-allen-bradley-slc-500-slc-8-point-20ma-output-module","title":"1746-NO8I 1746NO8I Allen-Bradley SLC 500 SLC 8 Point 20ma Output Module","description":"\u003cp\u003eEngineered to fulfill multi-loop analog control mandates within Allen-Bradley SLC 500 industrial processor environments, the \u003cstrong\u003e1746-NO8I\u003c\/strong\u003e 8-point current output module translates controller data words into precise 0-20 mA or 4-20 mA electrical currents to drive field actuators, final control elements, and analog indicators.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specification Matrix\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 Details\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley (Rockwell Automation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Family\u003c\/td\u003e\n\u003ctd\u003eSLC 500 Modular Controller Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Catalog Number\u003c\/td\u003e\n\u003ctd\u003e1746-NO8I\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFactory Spare Identifier\u003c\/td\u003e\n\u003ctd\u003e1746NO8I \/ 1746-NO8I\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Category\u003c\/td\u003e\n\u003ctd\u003e8-Point Analog Current Output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Signal Ranges\u003c\/td\u003e\n\u003ctd\u003e0 to 20 mA, 4 to 20 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Ambient Temperature\u003c\/td\u003e\n\u003ctd\u003e0 deg C to +60 deg C (32 deg F to 140 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation \/ Consumption\u003c\/td\u003e\n\u003ctd\u003e3.5 W typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhysical Shipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e24.5 cm x 16.5 cm x 5.5 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnit Weight\u003c\/td\u003e\n\u003ctd\u003e0.4 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eCore Circuitry \u0026amp; Signal Generation Behavior\u003c\/h3\u003e\n\u003cp\u003eThe module architecture manages eight independent analog output channels that rely on an external DC power supply to energize the control loops. Internal digital-to-analog conversion circuits process binary values received across the SLC 500 backplane bus, regulating loop current independently per channel. This design ensures stable analog signal reproduction for closed-loop process control applications without cross-channel interference.\u003c\/p\u003e\n\u003ch3\u003eMechanical Installation \u0026amp; Field Wiring Directives\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePower Disconnection: Shut off all rack backplane power before inserting or extracting the module to prevent electrical component damage or data corruption.\u003c\/li\u003e\n\u003cli\u003eSlot Placement: The unit can be placed in any available I\/O slot of an SLC 500 local chassis or expansion rack, provided power budget limits are respected.\u003c\/li\u003e\n\u003cli\u003eTerminal Connection: Terminate field loop conductors to the front removable terminal block (RTB), verifying correct polarity against loop power requirements.\u003c\/li\u003e\n\u003cli\u003eShielding Standards: Employ twisted-pair cabling with overall foil shielding for all analog output runs, grounding the shield drain wire exclusively at the panel bus.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eQ: What is the primary purpose of the 1746-NO8I module?\u003c\/li\u003e\n\u003cli\u003eA: It converts controller digital outputs into proportional 4-20 mA or 0-20 mA current signals to command external control valves and actuators.\u003c\/li\u003e\n\u003cli\u003eQ: How many channels are available on a single hardware card?\u003c\/li\u003e\n\u003cli\u003eA: The module provides eight dedicated, individually configurable analog current output channels.\u003c\/li\u003e\n\u003cli\u003eQ: Does the module supply loop power internally?\u003c\/li\u003e\n\u003cli\u003eA: No. An external DC power source must be wired into the loop to drive current through the field load.\u003c\/li\u003e\n\u003cli\u003eQ: Can this module handle voltage-based analog outputs?\u003c\/li\u003e\n\u003cli\u003eA: The 1746-NO8I variant is specifically optimized for current loops; voltage output configurations require alternative module part numbers.\u003c\/li\u003e\n\u003cli\u003eQ: Is hot-swapping permitted on SLC 500 backplanes?\u003c\/li\u003e\n\u003cli\u003eA: No. Power to the chassis must be completely isolated prior to mounting or dismounting any I\/O module.\u003c\/li\u003e\n\u003cli\u003eQ: What wire gauge is recommended for terminal block connections?\u003c\/li\u003e\n\u003cli\u003eA: Standard industrial copper wiring between 22 and 14 AWG ensures proper mechanical grip and low contact resistance.\u003c\/li\u003e\n\u003cli\u003eQ: What causes an output channel to drift or freeze at a fixed value?\u003c\/li\u003e\n\u003cli\u003eA: Common causes include loop power supply fluctuations, loose terminal screws, or severe electromagnetic interference on unshielded cables.\u003c\/li\u003e\n\u003cli\u003eQ: How does the system verify correct data transfer to the module?\u003c\/li\u003e\n\u003cli\u003eA: The backplane communication layer handles register updates cyclically, with status LEDs reflecting module operational health.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066406916269,"sku":"1746-NO8I","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/1746-NO8I_13.jpg?v=1785148178","url":"https:\/\/www.maxwellplc.com\/ga\/products\/1746-no8i-1746no8i-allen-bradley-slc-500-slc-8-point-20ma-output-module","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}