{"product_id":"1756-oa8-allen-bradley-digital-ac-output-module-controllogix","title":"1756-OA8 Allen-Bradley Digital AC Output Module ControlLogix","description":"\u003cp\u003eConfigured for discrete AC load control in ControlLogix chassis architectures, the \u003cstrong\u003eAllen-Bradley 1756-OA8\u003c\/strong\u003e (\u003cstrong\u003e1756-OA8\u003c\/strong\u003e Digital AC Output Module) provides direct physical\/electrical execution.\u003c\/p\u003e\n\u003ch3\u003eCatalog Designation \u0026amp; Module Classification\u003c\/h3\u003e\n\u003cp\u003eThe 1756-OA8 module provides eight individual solid-state AC outputs divided into two isolated groups of four points each. The device interfaces field-side actuators, solenoids, and motor starters directly to the ControlLogix system backplane across a high-speed parallel interface.\u003c\/p\u003e\n\u003ch3\u003eElectrical \u0026amp; Physical Specifications\u003c\/h3\u003e\n\u003cfigure\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\u003e1756-OA8\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\u003eOperating Voltage Range\u003c\/td\u003e\n\u003ctd\u003e74-265 VAC @ 47-63 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Voltage Category\u003c\/td\u003e\n\u003ctd\u003e120\/240 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Outputs\u003c\/td\u003e\n\u003ctd\u003e8 (4 points per group, 2 groups)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Rating Per Point\u003c\/td\u003e\n\u003ctd\u003e0.5 A @ 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Rating Per Group\u003c\/td\u003e\n\u003ctd\u003e2.0 A max @ 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (5 VDC)\u003c\/td\u003e\n\u003ctd\u003e200 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (24 VDC)\u003c\/td\u003e\n\u003ctd\u003e2 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e5.1 W max @ 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e50 V continuous (group-to-group and group-to-backplane)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 to 85 deg C\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\u003e0.35 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e23.3 x 18.3 x 5.3 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eSystem Integration \u0026amp; Deterministic Backplane Performance\u003c\/h3\u003e\n\u003cp\u003eThe module interfaces directly with the ControlLogix backplane bus, utilizing producer\/consumer technology for deterministic network data transmission over EtherNet\/IP platforms. Output state timing synchronization and system firmware compatibility are managed natively within Studio 5000 Logix Designer. Built-in electronic keying prevents module damage caused by installation into incorrect slot configurations.\u003c\/p\u003e\n\u003ch3\u003eOrder Fulfillment Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x 1756-OA8 AC Output Module\u003c\/li\u003e\n\u003cli\u003e1 x Factory Sealed Box\u003c\/li\u003e\n\u003cli\u003eNote: Removable Terminal Block (RTB) units (catalog numbers 1756-TBCH or 1756-TBNH) must be ordered separately.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation \u0026amp; Wiring Framework\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInsert the module into any available slot within a 1756 ControlLogix chassis until the top and bottom latches secure completely.\u003c\/li\u003e\n\u003cli\u003eVerify field wiring isolation and turn off all input power sources before installing or removing the Removable Terminal Block (RTB).\u003c\/li\u003e\n\u003cli\u003eRoute field wiring through the bottom of the RTB, utilizing individual strain reliefs to avoid tension on terminal connections.\u003c\/li\u003e\n\u003cli\u003eMaintain strict separation between high-voltage AC output conductors and low-voltage DC or communication bus lines within the panel wireways.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the maximum continuous current rating per output point for the 1756-OA8 module?\u003c\/p\u003e\n\u003cp\u003eEach individual channel handles up to 0.5 A continuous current at an ambient temperature of 60 deg C, subject to a total group limit of 2.0 A.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIs the 1756-OA8 module capable of hot-swapping under live chassis power?\u003c\/p\u003e\n\u003cp\u003eYes, the module supports Removal and Insertion Under Power (RIUP), allowing field swap-outs without interrupting system backplane communications.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDoes the 1756-OA8 package include the terminal block required for field wiring?\u003c\/p\u003e\n\u003cp\u003eNo, the Removable Terminal Block (1756-TBCH or 1756-TBNH) is not included with the standard module package and must be specified separately.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat amount of current does the module draw from the 5 VDC and 24 VDC backplane rails?\u003c\/p\u003e\n\u003cp\u003eThe unit draws 200 mA from the 5 VDC backplane bus rail and 2 mA from the 24 VDC backplane bus rail during normal operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the continuous isolation rating between output point groups?\u003c\/p\u003e\n\u003cp\u003eThe module features a tested 50 V continuous isolation rating between output groups as well as between output channels and the chassis backplane.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDoes the 1756-OA8 output module support DC load switching applications?\u003c\/p\u003e\n\u003cp\u003eNo, the output circuit topology utilizes solid-state AC switches designed strictly for operation within an alternating current range of 74 to 265 VAC.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat happens to output states if backplane communication with the controller is lost?\u003c\/p\u003e\n\u003cp\u003eEach channel can be programmed via Studio 5000 to hold its last state, turn off, or turn on in response to a communication fault event.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat size wire gauge can be connected to the compatible 1756 RTB units?\u003c\/p\u003e\n\u003cp\u003eThe standard terminal blocks accept solid or stranded copper wire sizes ranging from 22 AWG to 14 AWG rated for appropriate system temperatures.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066420482221,"sku":"1756-OA8","price":199.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/allen-bradley_1756-oa8_4.jpg?v=1787188434","url":"https:\/\/www.maxwellplc.com\/products\/1756-oa8-allen-bradley-digital-ac-output-module-controllogix","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}