{"product_id":"allen-bradley-1756-pb72k-controllogix-dc-power-supply-module","title":"Allen-Bradley 1756-PB72K ControlLogix DC Power Supply Module","description":"\u003ch2\u003eAllen-Bradley 1756-PB72K ControlLogix DC Power Supply Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for regulated chassis power distribution in ControlLogix systems, the \u003cstrong\u003eAllen-Bradley 1756-PB72K\u003c\/strong\u003e (\u003cstrong\u003e1756-PB72\u003c\/strong\u003e DC Power Supply Module) provides direct DC power conversion and backplane voltage delivery for installed controller and I\/O modules. The unit accepts 24 VDC input and generates regulated 1.2 V, 3.3 V, 5.1 V, and 24 VDC backplane outputs.\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\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\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-PB72K\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\u003e1.1 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e140 x 112 x 145 mm\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\u003e95 W maximum input power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eControlLogix DC Power Supply Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC nominal, 18 to 32 VDC range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Power\u003c\/td\u003e\n\u003ctd\u003e75 W at 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Voltages\u003c\/td\u003e\n\u003ctd\u003e1.2 VDC, 3.3 VDC, 5.1 VDC, 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Capacity\u003c\/td\u003e\n\u003ctd\u003e1.5 A at 1.2 VDC, 4 A at 3.3 VDC, 10 A at 5.1 VDC, 2.8 A at 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHold-up Time\u003c\/td\u003e\n\u003ctd\u003e35 ms at 18 VDC, 40 ms at 24 VDC and 32 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInrush Current\u003c\/td\u003e\n\u003ctd\u003e30 A peak\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChassis Compatibility\u003c\/td\u003e\n\u003ctd\u003e1756-A4, A7, A10, A13, A17 Series A\/B\/C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation Position\u003c\/td\u003e\n\u003ctd\u003eLeft side of ControlLogix chassis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiring Requirement\u003c\/td\u003e\n\u003ctd\u003e2.5 mm2 copper wire, insulation thickness \u0026lt;= 1.2 mm, terminal torque 0.565 N.m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInsulation Test\u003c\/td\u003e\n\u003ctd\u003eReinforced insulation tested at 3500 VDC for 60 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Type\u003c\/td\u003e\n\u003ctd\u003eOpen-style design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Bus Power Distribution Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e1756-PB72K\u003c\/strong\u003e operates as a ControlLogix chassis power source, converting external 24 VDC supply input into multiple regulated backplane voltage rails. The module supports I\/O density scaling through chassis-level power allocation, maintaining current delivery for installed ControlLogix processors, communication modules, and I\/O modules.\u003c\/p\u003e\n\u003cp\u003eThe power supply module interfaces with the ControlLogix backplane bus and provides distributed DC power without direct participation in application logic execution. The output current capability is defined by each backplane voltage rail, allowing system designers to calculate chassis loading according to installed module requirements.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: What input voltage range is supported by the 1756-PB72K?\u003cbr\u003eA: The module accepts 24 VDC nominal input with an operating range of 18 to 32 VDC.\u003c\/p\u003e\n\u003cp\u003eQ: Which ControlLogix chassis can install the 1756-PB72K?\u003cbr\u003eA: The module is compatible with 1756-A4, A7, A10, A13, and A17 chassis in Series A, B, and C configurations. It is mounted on the left side of the chassis.\u003c\/p\u003e\n\u003cp\u003eQ: Does the 1756-PB72K provide multiple backplane voltage outputs?\u003cbr\u003eA: Yes. The module supplies regulated 1.2 VDC, 3.3 VDC, 5.1 VDC, and 24 VDC backplane voltages for ControlLogix modules.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the 1756-PB72K on the left side of the ControlLogix chassis and verify chassis compatibility before applying power. Connect the 24 VDC input supply using appropriately sized copper conductors and maintain correct polarity at the terminal block.\u003c\/p\u003e\n\u003cp\u003eRoute DC power wiring separately from high-voltage AC cables and high-current switching conductors to reduce electrical interference. Apply standard industrial grounding practices, including proper bonding of the control panel grounding system and shielding termination where shielded cables are used.\u003c\/p\u003e\n\u003cp\u003eBefore operation, verify chassis power loading against the installed module requirements and confirm that the total backplane current demand remains within the power supply output limits.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43627589959770,"sku":"1756-PB72K","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1756-PB72.jpg?v=1779083747","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1756-pb72k-controllogix-dc-power-supply-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}