{"id":1954,"date":"2025-12-17T15:30:29","date_gmt":"2025-12-17T07:30:29","guid":{"rendered":"https:\/\/ksxiqian.cn\/?p=1954"},"modified":"2026-06-05T15:10:45","modified_gmt":"2026-06-05T07:10:45","slug":"spot-siemens-plc-module-6es7521-1bh10-0aa0-s7-1500-siemens-expansion-module","status":"publish","type":"post","link":"https:\/\/ksxiqian.cn\/?p=1954","title":{"rendered":"Spot Original Siemens 6ES7521-1BH10-0AA0 SM521 16DI 24VDC Sinking Digital Input Expansion Module For S7-1500 PLC"},"content":{"rendered":"\n<p class=\"has-medium-font-size wp-block-paragraph\">Spot available brand new original Siemens 6ES7521-1BH10-0AA0 (SM521) digital input module designed for SIMATIC S7-1500 PLC system. Equipped with 16-channel 24VDC sinking digital input complying with IEC Type3 standard, typical input delay 3.2ms, adjustable filter time from 0.1~20ms via program setting. Support single-channel diagnostics for wire breakage and short circuit, optocoupler isolation between internal bus and field circuit, IP20 protection, install onto S7-1500 backplane DIN rail. Front connector needs separate purchase. Commonly used for collecting proximity switch, limit switch feedback signals in general factory automation, original package with 12-month warranty, fast worldwide delivery from spot inventory.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Spot available brand new original Siemen&hellip;<\/p>\n","protected":false},"author":1,"featured_media":1819,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[26],"tags":[],"class_list":["post-1954","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-s7-1500"],"acf":[],"_links":{"self":[{"href":"https:\/\/ksxiqian.cn\/index.php?rest_route=\/wp\/v2\/posts\/1954","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ksxiqian.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ksxiqian.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ksxiqian.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ksxiqian.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1954"}],"version-history":[{"count":2,"href":"https:\/\/ksxiqian.cn\/index.php?rest_route=\/wp\/v2\/posts\/1954\/revisions"}],"predecessor-version":[{"id":9100,"href":"https:\/\/ksxiqian.cn\/index.php?rest_route=\/wp\/v2\/posts\/1954\/revisions\/9100"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ksxiqian.cn\/index.php?rest_route=\/wp\/v2\/media\/1819"}],"wp:attachment":[{"href":"https:\/\/ksxiqian.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1954"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ksxiqian.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1954"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ksxiqian.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1954"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}