{"product_id":"siemens-6es7221-3bf50-0xb0-s7-1200-g2-sb1221","title":"Siemens 6ES7221-3BF50-0XB0 S7-1200 G2 SB 1221 Digital Input Board","description":"\n\u003cdiv style=\"width:100%;max-width:850px;margin:20px auto;font-family:Inter,Arial,sans-serif;color:#222;line-height:1.65;border:2px solid #009999;border-radius:12px;overflow:hidden;background:#fff;box-shadow:0 4px 15px rgba(0,0,0,0.08);\"\u003e\n\n  \u003c!-- HERO --\u003e\n  \u003cdiv style=\"background:#009999;padding:26px 30px;color:#fff;\"\u003e\n    \u003cdiv style=\"font-size:11px;font-weight:800;letter-spacing:1px;text-transform:uppercase;margin-bottom:6px;\"\u003e\n      YingZhou Industrial Automation | Product Information\n    \u003c\/div\u003e\n    \u003ch2 style=\"margin:0;font-size:25px;font-weight:800;color:#fff;line-height:1.3;\"\u003e\n      Siemens 6ES7221-3BF50-0XB0 S7-1200 G2 Signal Board\n    \u003c\/h2\u003e\n    \u003cdiv style=\"margin-top:8px;font-size:14px;font-weight:700;\"\u003e\n      SB 1221 DC | 8 Digital Inputs | 24V DC | Sink\/Source | 100kHz\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- STOCK STATUS --\u003e\n  \u003cdiv style=\"padding:14px 25px;background:#F2F7FC;border-bottom:1px solid #eee;font-size:14px;\"\u003e\n    \u003cstrong style=\"color:#009999;\"\u003e✓ IN STOCK \u0026amp; AVAILABLE TO ORDER\u003c\/strong\u003e\n    \u003cspan style=\"color:#555;\"\u003e |  Actual Packaging Photos  |  Exact Catalog Number Verified on Carton\u003c\/span\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- TECHNICAL SPECIFICATIONS --\u003e\n  \u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;\"\u003e\n    \u003ctr style=\"background:#F2F7FC;\"\u003e\n      \u003cth style=\"padding:12px;border:1px solid #ddd;text-align:left;width:40%;\"\u003eSpecification\u003c\/th\u003e\n      \u003cth style=\"padding:12px;border:1px solid #ddd;text-align:left;\"\u003eVerified Product Data\u003c\/th\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eManufacturer\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eSiemens AG\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eCatalog Number\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e6ES7221-3BF50-0XB0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eProduct Family\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eSIMATIC S7-1200 G2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eModule Family\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eSB 1221\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eProduct Designation\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eSB 1221 Digital Input, 8 DI 100kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eProduct Type\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eDigital Input Signal Board\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eDigital Input Channels\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eRated Input Voltage\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e24V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eDigital Input Type\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eSink \/ Source\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eHigh-Speed Input Capability\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e100kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eDigital Output Channels\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eNone Specified\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eExpansion Type\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eSignal Board\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eCompatible PLC Family\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eSIMATIC S7-1200 G2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eStandard S7-1200 Compatibility\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eNot Established - Do Not Assume\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eRefer to Exact Siemens Technical Data\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eInput Thresholds\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eNot Independently Verified\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eElectrical Isolation\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eNot Independently Verified\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eFunctional Status - Actual Carton\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eFS 02\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eFirmware - Actual Carton\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eV01.00.00\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003ePackaging Date Marking\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e09.2026\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eEAN \/ GTIN\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e4047623417187\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003ePackaging Quantity\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003e1 Piece\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eCountry of Origin - Carton\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;\"\u003eMade in China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\n  \u003cdiv style=\"padding:30px;\"\u003e\n\n    \u003c!-- PRODUCT OVERVIEW --\u003e\n    \u003ch2 style=\"font-size:19px;font-weight:800;color:#222;margin:0 0 12px;border-bottom:4px solid #009999;padding-bottom:7px;\"\u003e\n      Product Overview\n    \u003c\/h2\u003e\n    \u003cp style=\"font-size:14px;color:#555;line-height:1.8;margin:0;\"\u003e\n      The \u003cstrong\u003eSiemens 6ES7221-3BF50-0XB0\u003c\/strong\u003e is a \u003cstrong\u003eSIMATIC S7-1200 G2 SB 1221 digital input signal board\u003c\/strong\u003e designed to expand the digital input capabilities of compatible S7-1200 G2 PLC systems. This signal board provides \u003cstrong\u003e8 digital inputs rated for 24V DC\u003c\/strong\u003e and supports \u003cstrong\u003esinking and sourcing input configurations\u003c\/strong\u003e. Siemens specifies a \u003cstrong\u003e100kHz high-speed input capability\u003c\/strong\u003e for the exact product model. The SB 1221 belongs to the new-generation \u003cstrong\u003eSIMATIC S7-1200 G2\u003c\/strong\u003e automation platform and must not be confused with conventional S7-1200 signal modules or older-generation signal boards. This product is a \u003cstrong\u003edigital input expansion board\u003c\/strong\u003e rather than a digital output module or standalone PLC CPU. Actual Siemens packaging photographs show the matching catalog number \u003cstrong\u003e6ES7221-3BF50-0XB0\u003c\/strong\u003e, along with the SB 1221 DC designation, functional status FS 02 and firmware marking V01.00.00. The signal board inside the carton has not been separately photographed. Buyers should confirm the exact S7-1200 G2 CPU model, signal requirements and hardware compatibility before ordering.\n    \u003c\/p\u003e\n\n    \u003c!-- KEY PRODUCT FEATURES --\u003e\n    \u003cdiv style=\"background:#F2F7FC;border-left:8px solid #009999;padding:22px;margin-top:22px;border-radius:8px;\"\u003e\n      \u003ch3 style=\"margin:0 0 12px;color:#009999;font-size:17px;\"\u003eKey Product Features\u003c\/h3\u003e\n      \u003cul style=\"font-size:14px;color:#555;padding-left:20px;margin:0;\"\u003e\n        \u003cli style=\"margin-bottom:7px;\"\u003e\n\u003cstrong\u003eSIMATIC S7-1200 G2 Signal Board\u003c\/strong\u003e — Siemens SB 1221 digital input expansion for compatible next-generation PLC systems.\u003c\/li\u003e\n        \u003cli style=\"margin-bottom:7px;\"\u003e\n\u003cstrong\u003e8 Digital Input Channels\u003c\/strong\u003e — Eight digital inputs for industrial signal acquisition.\u003c\/li\u003e\n        \u003cli style=\"margin-bottom:7px;\"\u003e\n\u003cstrong\u003e24V DC Digital Inputs\u003c\/strong\u003e — Digital input channels rated for 24V DC signals.\u003c\/li\u003e\n        \u003cli style=\"margin-bottom:7px;\"\u003e\n\u003cstrong\u003eSink \/ Source Technology\u003c\/strong\u003e — Supports sinking and sourcing input configurations.\u003c\/li\u003e\n        \u003cli style=\"margin-bottom:7px;\"\u003e\n\u003cstrong\u003e100kHz Input Capability\u003c\/strong\u003e — High-speed digital input performance specified for this product.\u003c\/li\u003e\n        \u003cli style=\"margin-bottom:7px;\"\u003e\n\u003cstrong\u003eDigital Input Expansion\u003c\/strong\u003e — Adds input channels to compatible S7-1200 G2 CPU configurations.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eExact Siemens Catalog Number\u003c\/strong\u003e — Order number 6ES7221-3BF50-0XB0 for precise procurement identification.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n\n    \u003c!-- ACTUAL PRODUCT VERIFICATION --\u003e\n    \u003cdiv style=\"margin-top:22px;padding:20px 22px;border:1px solid #D7E5F2;border-radius:8px;background:#FAFCFE;\"\u003e\n      \u003ch3 style=\"margin:0 0 12px;color:#009999;font-size:17px;\"\u003eActual Product Verification\u003c\/h3\u003e\n      \u003cdiv style=\"font-size:14px;color:#555;line-height:1.9;\"\u003e\n        \u003cdiv\u003e✓ Actual Siemens packaging photographs supplied\u003c\/div\u003e\n        \u003cdiv\u003e✓ Packaging catalog number: \u003cstrong\u003e6ES7221-3BF50-0XB0\u003c\/strong\u003e\n\u003c\/div\u003e\n        \u003cdiv\u003e✓ Product family: \u003cstrong\u003eSIMATIC S7-1200 G2\u003c\/strong\u003e\n\u003c\/div\u003e\n        \u003cdiv\u003e✓ Product designation: \u003cstrong\u003eSB 1221 DC\u003c\/strong\u003e\n\u003c\/div\u003e\n        \u003cdiv\u003e✓ Packaging identifies \u003cstrong\u003eDI 8 x 24V DC\u003c\/strong\u003e\n\u003c\/div\u003e\n        \u003cdiv\u003e✓ Functional status marking: \u003cstrong\u003eFS 02\u003c\/strong\u003e\n\u003c\/div\u003e\n        \u003cdiv\u003e✓ Firmware marking: \u003cstrong\u003eFW V01.00.00\u003c\/strong\u003e\n\u003c\/div\u003e\n        \u003cdiv\u003e✓ Packaging date marking: \u003cstrong\u003e09.2026\u003c\/strong\u003e\n\u003c\/div\u003e\n        \u003cdiv\u003e✓ Carton origin: \u003cstrong\u003eMade in China\u003c\/strong\u003e\n\u003c\/div\u003e\n        \u003cdiv\u003e✓ Signal board hardware nameplate not separately photographed\u003c\/div\u003e\n        \u003cdiv\u003e✓ Confirm exact CPU compatibility and final package contents before ordering\u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003c!-- AVAILABILITY --\u003e\n    \u003cdiv style=\"background:#fff;border:2px solid #009999;border-left:8px solid #009999;padding:22px;margin-top:22px;border-radius:8px;\"\u003e\n      \u003ch3 style=\"margin:0 0 8px;font-size:17px;color:#009999;\"\u003eIn Stock \u0026amp; Available to Order\u003c\/h3\u003e\n      \u003cp style=\"font-size:14px;color:#555;line-height:1.8;margin:0;\"\u003e\n        Siemens \u003cstrong\u003e6ES7221-3BF50-0XB0\u003c\/strong\u003e is marked \u003cstrong\u003ein stock\u003c\/strong\u003e based on the supplied inventory information. Actual Siemens packaging photographs show the matching catalog number and SIMATIC S7-1200 G2 SB 1221 digital input designation. This signal board is offered for compatible S7-1200 G2 PLC expansion, industrial maintenance and automation procurement. Please confirm the required quantity, \u003cstrong\u003e8 digital inputs, 24V DC signal requirements, sink\/source configuration and 100kHz input capability\u003c\/strong\u003e before ordering. Compatibility with earlier-generation SIMATIC S7-1200 CPU models must not be assumed. The internal signal board and final delivered contents should be checked before shipment.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003c!-- CTA --\u003e\n    \u003cdiv style=\"margin-top:25px;padding:25px;background:#009999;border-radius:8px;text-align:center;color:#fff;\"\u003e\n      \u003cdiv style=\"font-size:12px;font-weight:800;\"\u003eIN STOCK\u003c\/div\u003e\n      \u003ch3 style=\"margin:8px 0;color:#fff;font-size:20px;\"\u003eSiemens 6ES7221-3BF50-0XB0\u003c\/h3\u003e\n      \u003cp style=\"font-size:14px;margin:0 0 16px;color:#fff;\"\u003e\n        Contact us for exact-model verification, multiple units and industrial PLC signal board sourcing. Please confirm your S7-1200 G2 CPU model, 24V DC input configuration and high-speed signal requirements before ordering.\n      \u003c\/p\u003e\n      \u003ca href=\"\/ar\/pages\/contact\" style=\"display:inline-block;background:#fff;color:#009999;text-decoration:none;font-weight:800;padding:12px 24px;border-radius:6px;\"\u003eRequest Bulk Pricing\u003c\/a\u003e\n    \u003c\/div\u003e\n\n    \u003c!-- SIEMENS BRAND INTERNAL LINK --\u003e\n    \u003cdiv style=\"margin-top:26px;padding-top:20px;border-top:1px solid #eee;\"\u003e\n      \u003cp style=\"margin:0 0 4px;font-size:14px;color:#555;\"\u003eLooking for other Siemens industrial automation products?\u003c\/p\u003e\n      \u003ca href=\"\/ar\/collections\/siemens\" style=\"color:#009999;font-size:14px;font-weight:800;text-decoration:underline;\"\u003eExplore Siemens Industrial Automation Products\u003c\/a\u003e\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\u003c\/div\u003e\n","brand":"SIEMENS","offers":[{"title":"6ES7221-3BF50-0XB0","offer_id":58716877553967,"sku":"6ES7522-1BH10-0AA0","price":92.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/9473\/5919\/files\/Siemens-6ES7221-3BF50-0XB0-S7-1200-G2-SB-1221-Digital-Input-Board.jpg?v=1792998416","url":"https:\/\/szyingzhou.com\/ar\/products\/siemens-6es7221-3bf50-0xb0-s7-1200-g2-sb1221","provider":"YingZhou Automatization","version":"1.0","type":"link"}