{"product_id":"siemens-simatic-sm321-16di-module-6es7321-7bh01-0ab0","title":"Siemens SIMATIC SM321 16DI Module - 6ES7321-7BH01-0AB0","description":"\u003ch2\u003eSiemens 6ES7321-7BH01-0AB0: Reliable Digital Input Module\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003e6ES7321-7BH01-0AB0\u003c\/strong\u003e module brings smart control to your automation system. It reads signals from sensors and switches efficiently. The module fits perfectly in SIMATIC S7-300 PLC racks. You get sixteen isolated digital inputs in one compact unit.\u003c\/p\u003e\n\u003ch3\u003eQuick Setup Guide\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEasy installation in S7-300 PLC systems\u003c\/li\u003e\n\u003cli\u003eSimple wiring with 20-pin front connector\u003c\/li\u003e\n\u003cli\u003eFast configuration through STEP 7 software\u003c\/li\u003e\n\u003cli\u003eQuick diagnostics with LED status indicators\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMain Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eBrand:\u003c\/span\u003e Siemens\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eSeries:\u003c\/span\u003e SIMATIC S7-300\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eModule Type:\u003c\/span\u003e Digital Input SM 321\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003ePart Number:\u003c\/span\u003e \u003cstrong\u003e6ES7321-7BH01-0AB0\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eInput Channels:\u003c\/span\u003e 16 isolated inputs\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eVoltage Rating:\u003c\/span\u003e 24V DC operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eInput Current:\u003c\/span\u003e 7 mA per signal\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003ePower Usage:\u003c\/span\u003e 4W typical loss\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eElectrical Characteristics\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eSupply Voltage:\u003c\/span\u003e 20.4V to 28.8V DC range\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eSignal Detection:\u003c\/span\u003e 13-30V for \"1\", -30 to +5V for \"0\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eBackplane Current:\u003c\/span\u003e 130 mA maximum at 5V\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eEncoder Supply:\u003c\/span\u003e 2 outputs at 120 mA each\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eWire-break Detection:\u003c\/span\u003e 10-18 kΩ monitoring\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eCable Length:\u003c\/span\u003e 1000m shielded, 600m unshielded\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAdvanced Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eProcess interrupt capability for fast response\u003c\/li\u003e\n\u003cli\u003eDiagnostic functions with parameter settings\u003c\/li\u003e\n\u003cli\u003eHardware interrupts for critical events\u003c\/li\u003e\n\u003cli\u003eWire-break detection for maintenance\u003c\/li\u003e\n\u003cli\u003eSuitable for isochronous operation mode\u003c\/li\u003e\n\u003cli\u003eReverse polarity protection on inputs\u003c\/li\u003e\n\u003cli\u003eLED status indicators for all channels\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePhysical Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eDimensions:\u003c\/span\u003e 40 x 125 x 120 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eWeight:\u003c\/span\u003e Approximately 200 grams\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eConnector:\u003c\/span\u003e 20-pin front connection\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eMounting:\u003c\/span\u003e S7-300 standard rail\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eIsolation:\u003c\/span\u003e 500V DC tested\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEnvironmental Ratings\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eTemperature Range:\u003c\/span\u003e 0°C to 60°C operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eInstallation:\u003c\/span\u003e Horizontal or vertical mounting\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003ePollution Degree:\u003c\/span\u003e Level 2 protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e75b6;\"\u003eSafety Standards:\u003c\/span\u003e IEC 61131 compliant\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOne Siemens \u003cstrong\u003e6ES7321-7BH01-0AB0\u003c\/strong\u003e module\u003c\/li\u003e\n\u003cli\u003eComplete documentation package\u003c\/li\u003e\n\u003cli\u003eQuality inspection certificate\u003c\/li\u003e\n\u003cli\u003eProtective shipping materials\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eShipping Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFast worldwide delivery available\u003c\/li\u003e\n\u003cli\u003eProfessional packing for safety\u003c\/li\u003e\n\u003cli\u003eFedEx, UPS, DHL express options\u003c\/li\u003e\n\u003cli\u003eOrder tracking provided\u003c\/li\u003e\n\u003cli\u003e12-month product warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"color: #2e75b6;\"\u003eCan this module work with 2-wire sensors?\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eYes, it supports 2-wire sensors with 2mA maximum quiescent current.\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #2e75b6;\"\u003eWhat cable length can I use safely?\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eYou can use up to 1000 meters with shielded cable for best results.\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #2e75b6;\"\u003eHow do I set input delay times?\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eConfigure delay from 0.1 to 20ms through software parameter settings.\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #2e75b6;\"\u003eDoes it need external power supply?\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eIt gets power from backplane but needs 24V DC for input signals.\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #2e75b6;\"\u003eWhat indicates module problems?\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eRed SF LED shows errors, green LEDs show input status clearly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e© 2025 Ubest Automation Limited. All rights reserved.\u003cbr\u003eOriginal Source: \u003ca href=\"https:\/\/www.ubestplc.com\/\"\u003ehttps:\/\/www.ubestplc.com\/\u003c\/a\u003e\u003cbr\u003eContact: \u003ca href=\"mailto:sales@ubestplc.com\"\u003esales@ubestplc.com\u003c\/a\u003e Phone: \u003ca href=\"https:\/\/wa.me\/8618030005825\"\u003e+86 180 3000 5825\u003c\/a\u003e\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":51302103810330,"sku":"6ES7321-7BH01-0AB0","price":175.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/6240\/4634\/files\/6ES7321-1BH02-0AA0.jpg?v=1724479740","url":"https:\/\/www.ubestplc.com\/kk\/products\/siemens-simatic-sm321-16di-module-6es7321-7bh01-0ab0","provider":"Ubest Automation Limited","version":"1.0","type":"link"}