{"product_id":"allen-bradley-1756-a4-chassis-controllogix","title":"Allen-Bradley 1756-A4 Chassis ControlLogix","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1756-A4\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1756A4\u003c\/strong\u003e Chassis, operates as a dedicated hardware component for physical module mounting and backplane signal distribution within ControlLogix networks.\u003c\/p\u003e\n\u003ch3\u003ePart Number Breakdown \u0026amp; Module Matrix\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1756\u003c\/strong\u003e: Base product family identifier designating Allen-Bradley ControlLogix hardware platforms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA4\u003c\/strong\u003e: Chassis configuration suffix specifying a four-slot horizontal physical backplane layout.\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\u003e1756-A4\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\u003e1.05 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e21.2 x 26.8 x 16.8 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 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\u003e4 Watts max dissipation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlots\u003c\/td\u003e\n\u003ctd\u003eFour (4) slots\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eHorizontal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (5 VDC)\u003c\/td\u003e\n\u003ctd\u003e10 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (24 VDC)\u003c\/td\u003e\n\u003ctd\u003e2.8 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eIndustrial Control \u0026amp; Drive Interface Integration\u003c\/h3\u003e\n\u003cp\u003eEngineered for industrial automation environments, the chassis facilitates high-speed backplane bus communication velocities and supports Profinet and EtherNet\/IP deterministic networks. It guarantees precise I\/O density scaling and firmware flash compatibility across installed controller modules.\u003c\/p\u003e\n\u003ch3\u003ePackage Ordering Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x 1756-A4 ControlLogix 4 Slots Chassis unit\u003c\/li\u003e\n\u003cli\u003e1 x Grounding mounting screw kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMechanical Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePanel Mounting\u003c\/strong\u003e: Secure the chassis firmly to a grounded metal backplate using all designated mounting holes to withstand operational vibration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrounding Compliance\u003c\/strong\u003e: Connect the chassis ground lug directly to the enclosure ground bus using a low-impedance copper conductor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal Clearance\u003c\/strong\u003e: Maintain minimum vertical and horizontal spacing around the chassis housing to allow unimpeded convective airflow.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the total slot capacity of the 1756-A4 chassis?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The unit provides a total of four physical backplane slots for module installation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the maximum power dissipation rating for this backplane?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The maximum power dissipation capacity of the chassis backplane is 4 Watts.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How much 5 VDC backplane current is available for connected modules?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The chassis supplies up to 10 amps of current on the 5 Volts DC backplane rail.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the maximum 24 VDC backplane current output?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The backplane delivers a maximum current of 2.8 Amps on the 24 Volts DC rail.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the official physical weight of the chassis unit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The unboxed hardware unit weighs 1.05 kg with estimated shipping dimensions of 21.2 x 26.8 x 16.8 cm.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What country is designated as the origin of manufacture?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The hardware unit is manufactured in the USA.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can modules be inserted or removed while power is applied?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e ControlLogix backplanes support removal and insertion under power (RIUP) for compatible modules, provided proper precautions are followed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What mounting orientation is specified for this chassis?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The chassis is designed strictly for horizontal panel mounting configurations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066411962541,"sku":"1756-A4","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/1756-A4_14.jpg?v=1785424808","url":"https:\/\/www.maxwellplc.com\/ga\/products\/allen-bradley-1756-a4-chassis-controllogix","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}