{"product_id":"allen-bradley-1771-pa-power-supply-module","title":"Allen-Bradley 1771-PA Power Supply Module","description":"\u003cp\u003eThe \u003cstrong\u003e1771-PA\u003c\/strong\u003e is a standalone AC power supply module manufactured by Allen-Bradley for the PLC-5 and Mini-PLC-2 automation platforms. Designed to mount directly alongside or above a Bulletin 1771 I\/O chassis, it accepts a dual-voltage AC input rating of 120\/220 V AC and converts it into a regulated 16 A backplane output at 5 V DC to power local processors, communication adapters, and I\/O modules.\u003c\/p\u003e\n\u003ch3\u003ePower Conversion and Voltage Flexibility\u003c\/h3\u003e\n\u003cp\u003eThe module supports nominal input voltage selections of 120 V AC (1 A input current) and 220 V AC (0.5 A input current) over an operating frequency range of 47 to 63 Hz. It accommodates input voltage tolerances between 97–132 V AC or 195–264 V AC, drawing up to 108 W of real input power and 176 VA of apparent input power under maximum operating load. Output protection is reinforced via an internal 3 A, 250 V normal-blow fuse.\u003c\/p\u003e\n\u003ch3\u003eMechanical Installation and Chassis Mounting Requirements\u003c\/h3\u003e\n\u003cp\u003eAs a standalone, open-type module, the unit requires installation within an industrial enclosure to safeguard against electrostatic discharge and environmental contamination. To maintain proper natural convection cooling, installers must maintain a minimum vertical clearance of 6 inches and ensure the module is placed adjacent to or above the 1771 chassis—never directly beneath it. Interconnection with chassis adapters or processor modules is established using 1771-CP1, 1771-CP2, or 1771-CP3 interface cabling.\u003c\/p\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\u003e1771-PA\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\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003ePower Supply Modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Input Voltage\u003c\/td\u003e\n\u003ctd\u003e120\/220 V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e97–132 V AC \/ 195–264 V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Input Current\u003c\/td\u003e\n\u003ctd\u003e1 A @ 120 V AC \/ 0.5 A @ 220 V AC\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\u003eMaximum Real Input Power\u003c\/td\u003e\n\u003ctd\u003e108 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Apparent Input Power\u003c\/td\u003e\n\u003ctd\u003e176 VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Transformer Load\u003c\/td\u003e\n\u003ctd\u003e270 VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Output Current\u003c\/td\u003e\n\u003ctd\u003e16 A @ 5 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuse Rating\u003c\/td\u003e\n\u003ctd\u003e3 A, 250 V, Normal-Blow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Cabling\u003c\/td\u003e\n\u003ctd\u003e1771-CP1, 1771-CP2, 1771-CP3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e12.31 lbs (5.58 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eOperational Restrictions and Configuration\u003c\/h3\u003e\n\u003cp\u003eBefore mounting the 1771-PA, ensure the chassis power supply configuration jumper is set to the \u003cstrong\u003eN\u003c\/strong\u003e position. This standalone unit is engineered to power a single 1771 I\/O chassis independently and must never be wired in parallel with another power supply. Parallel operation can cause unstable voltage delivery, resulting in equipment damage, processor memory loss, or uncommanded machine behavior.\u003c\/p\u003e\n\u003cp\u003eFrequently Asked Questions\u003c\/p\u003e\n\u003cp\u003eQ: Can the 1771-PA power supply be connected in parallel to increase chassis output current? A: No, the 1771-PA is strictly a standalone power supply and must not be connected in parallel, as doing so can cause system instability and memory loss.\u003c\/p\u003e\n\u003cp\u003eQ: Where should the 1771-PA be mounted relative to the 1771 I\/O chassis? A: It must be mounted directly above or beside the I\/O chassis with a minimum 6-inch vertical clearance; mounting it below the chassis disrupts convection thermal cooling.\u003c\/p\u003e\n\u003cp\u003eQ: What cables are used to connect the 1771-PA to the chassis or processor?A: The module connects via 1771-CP1 local cabling or 1771-CP2 \/ 1771-CP3 remote cabling assemblies.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":67099814527091,"sku":"1771-PA","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/1771-PA_Cocoai.jpg?v=1793690137","url":"https:\/\/www.dcssupplier.com\/ar\/products\/allen-bradley-1771-pa-power-supply-module","provider":"DcsSupplier Limited","version":"1.0","type":"link"}