{"product_id":"allen-bradley-1771-p4r-redundant-power-supply-module","title":"Allen-Bradley 1771-P4R Redundant Power Supply Module","description":"\u003ch2\u003eAllen-Bradley 1771-P4R Redundant Power Supply Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for redundant 5 VDC backplane power delivery in Bulletin 1771 PLC-5 chassis systems, the \u003cstrong\u003eAllen-Bradley 1771-P4R\u003c\/strong\u003e (\u003cstrong\u003e1771-P4R\u003c\/strong\u003e Redundant Power Supply Module) provides direct physical\/electrical execution for chassis power distribution and N+1 supply configurations. The module accepts 120 VAC input and supplies regulated 5 VDC output current to the PLC I\/O 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\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\u003e1771-P4R\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\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.87 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e32 to 131 deg F (0 to 55 deg C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eMax real input power 59 W; max apparent input power 92 VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eRedundant Power Supply Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Line\u003c\/td\u003e\n\u003ctd\u003ePLC-5 \/ Bulletin 1771\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e120 VAC nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e97-132 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Frequency\u003c\/td\u003e\n\u003ctd\u003e47-63 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage\u003c\/td\u003e\n\u003ctd\u003e5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Output Current\u003c\/td\u003e\n\u003ctd\u003e8 A at 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eN+1 Redundancy Capacity\u003c\/td\u003e\n\u003ctd\u003e8 A (2 unit system); 14 A (3 unit system); 20 A (4 unit system) at 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChassis Occupancy\u003c\/td\u003e\n\u003ctd\u003e1 slot\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuse Rating\u003c\/td\u003e\n\u003ctd\u003e1.5 A, 250 VAC slow-blow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlarm Relay Rating\u003c\/td\u003e\n\u003ctd\u003e250 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHumidity\u003c\/td\u003e\n\u003ctd\u003e5-95% relative humidity, non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 to 185 deg F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003ePLC-5 Redundant Power Architecture\u003c\/h3\u003e\n\u003cp\u003eThe 1771-P4R is designed for redundant power configurations within the Bulletin 1771 chassis platform. Multiple units can be connected through the redundancy cable to provide increased backplane current capacity and maintain chassis power distribution during individual supply removal or failure conditions.\u003c\/p\u003e\n\u003cp\u003eThe module provides regulated 5 VDC output through the 1771 backplane interface. The internal power conversion circuitry includes AC input protection, DC regulation, and alarm relay monitoring for supply status indication.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How many chassis slots does the 1771-P4R occupy?\u003cbr\u003eA: The 1771-P4R occupies one slot in a compatible Bulletin 1771 chassis.\u003c\/p\u003e\n\u003cp\u003eQ: What backplane output voltage and current are provided by the module?\u003cbr\u003eA: The module provides 5 VDC backplane output with a maximum current rating of 8 A.\u003c\/p\u003e\n\u003cp\u003eQ: Can multiple 1771-P4R modules be used in a redundant configuration?\u003cbr\u003eA: Yes. The module supports N+1 redundancy configurations using compatible redundancy cabling, with current capacity dependent on the number of power supply units installed.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the 1771-P4R in a compatible Bulletin 1771 chassis slot and verify the AC input wiring before energizing the system. Confirm that redundancy cable connections are properly seated when multiple power supply modules are configured together.\u003c\/p\u003e\n\u003cp\u003eRoute AC power wiring separately from low-level I\/O signal wiring to reduce electrical noise coupling. Connect protective grounding according to industrial control panel standards. Maintain proper cable separation and secure wiring blocks for AC power and alarm relay connections.\u003c\/p\u003e\n\u003cp\u003eBefore startup, verify the installed supply configuration, backplane load requirements, and fuse condition. Ensure the operating environment remains within the specified temperature and humidity limits.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43698843517018,"sku":"1771-P4R","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1771-P4R2.jpg?v=1784690188","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1771-p4r-redundant-power-supply-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}