{"product_id":"allen-bradley-1771-sn-universal-remote-i-o-communication-module","title":"Allen-Bradley 1771-SN Universal Remote I\/O Communication Module","description":"\u003ch2\u003eAllen-Bradley 1771-SN Universal Remote I\/O Communication Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for remote I\/O data exchange in PLC-5 control systems, the \u003cstrong\u003eAllen-Bradley 1771-SN\u003c\/strong\u003e (\u003cstrong\u003e1771-SN\u003c\/strong\u003e Universal Remote I\/O Communication Module) provides direct physical and data communication execution through the 1771 backplane interface. The module performs remote I\/O scanning and block-transfer communication with PLC-5 processors.\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-SN\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\u003e1.90 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e1 slot 1771 chassis module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e0.2 A typical backplane current at 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eCommunication Modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Line\u003c\/td\u003e\n\u003ctd\u003ePLC-5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Protocol\u003c\/td\u003e\n\u003ctd\u003eUniversal Remote I\/O\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Operation\u003c\/td\u003e\n\u003ctd\u003eScan I\/O\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePLC Processor Interface\u003c\/td\u003e\n\u003ctd\u003eBlock-transfer communication with PLC-5 processor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003e1771 I\/O chassis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlot Requirement\u003c\/td\u003e\n\u003ctd\u003e1 slot\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiring Arm\u003c\/td\u003e\n\u003ctd\u003e1771-WN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTypical AC Signal Delay On\u003c\/td\u003e\n\u003ctd\u003e11 +\/- 6 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTypical DC Signal Delay On\u003c\/td\u003e\n\u003ctd\u003e3 +\/- 2 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTypical AC Signal Delay Off\u003c\/td\u003e\n\u003ctd\u003e29 +\/- 8 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTypical DC Signal Delay Off\u003c\/td\u003e\n\u003ctd\u003e30 +\/- 7 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003ePLC-5 Remote I\/O Communication Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe 1771-SN operates as a PLC-5 communication interface module using the 1771 backplane bus for processor data exchange. The module performs remote I\/O scanning functions and transfers input and output data between distributed field devices and the PLC-5 processor.\u003c\/p\u003e\n\u003cp\u003eThe communication architecture supports deterministic remote I\/O execution through Universal Remote I\/O protocol. The module exchanges control data using block-transfer instructions with the PLC-5 processor, allowing structured transfer of remote device information.\u003c\/p\u003e\n\u003cp\u003eThe module is designed for PLC-5 I\/O density scaling by adding remote signal handling capacity without direct expansion of local chassis wiring. Firmware compatibility and system configuration must match the installed PLC-5 processor and remote I\/O network requirements.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What communication protocol does the 1771-SN support?\u003cbr\u003eA: The 1771-SN uses Universal Remote I\/O protocol for remote I\/O communication within PLC-5 systems.\u003c\/p\u003e\n\u003cp\u003eQ: How much backplane current does the 1771-SN require?\u003cbr\u003eA: The module requires approximately 0.2 A of backplane current at 5 VDC.\u003c\/p\u003e\n\u003cp\u003eQ: What type of PLC-5 processor communication is supported?\u003cbr\u003eA: The module communicates with PLC-5 processors through block-transfer operations.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the 1771-SN in a compatible 1771 I\/O chassis slot and verify available backplane power capacity before system operation. Use the specified 1771-WN wiring arm for field connections.\u003c\/p\u003e\n\u003cp\u003eRoute remote I\/O communication wiring separately from high-current power conductors to minimize electrical interference. Use appropriate shield grounding practices according to cabinet grounding design and network installation requirements.\u003c\/p\u003e\n\u003cp\u003eVerify remote I\/O addressing, processor configuration, and communication parameters before enabling system control. Confirm wiring polarity and terminal connections during commissioning.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43701402173530,"sku":"1771-SN","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1771-SN2.jpg?v=1784701768","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1771-sn-universal-remote-i-o-communication-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}