{"id":8443,"date":"2026-06-16T17:15:15","date_gmt":"2026-06-16T17:15:15","guid":{"rendered":"https:\/\/www.yunrui-controls.com\/?p=8443"},"modified":"2026-06-16T17:15:15","modified_gmt":"2026-06-16T17:15:15","slug":"24v-dc-vs-220v-ac-instrument-power-supply-guide","status":"publish","type":"post","link":"https:\/\/www.yunrui-controls.com\/ja\/24v-dc-vs-220v-ac-instrument-power-supply-guide\/","title":{"rendered":"24V DC\u3068220V AC\u306e\u8a08\u6e2c\u6a5f\u5668\u7528\u96fb\u6e90\uff1a\u5b8c\u5168\u9078\u5b9a\u30ac\u30a4\u30c9"},"content":{"rendered":"<p>\u9078\u629e\u3059\u308b <strong>24V DC\u304a\u3088\u3073220V AC\u6a5f\u5668\u7528\u96fb\u6e90<\/strong> \u7523\u696d\u30aa\u30fc\u30c8\u30e1\u30fc\u30b7\u30e7\u30f3\u306b\u304a\u3044\u3066\u3001\u96fb\u5727\u306e\u9078\u629e\u306f\u6975\u3081\u3066\u91cd\u8981\u3067\u3059\u3002\u96fb\u5727\u3092\u8aa4\u308b\u3068\u3001\u5b89\u5168\u4e0a\u306e\u5371\u967a\u3001\u4fe1\u53f7\u5e72\u6e09\u3001\u6a5f\u5668\u306e\u6545\u969c\u306a\u3069\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30ac\u30a4\u30c9\u3067\u306f\u3001\u7523\u696d\u6a5f\u5668\u306b24V DC\u3068220V AC\u306e\u3069\u3061\u3089\u3092\u4f7f\u7528\u3059\u3079\u304d\u304b\u3092\u3001\u5b9f\u969b\u306e\u73fe\u5834\u3067\u306e\u5fdc\u7528\u3092\u60f3\u5b9a\u3057\u305f\u5b9f\u7528\u7684\u306a\u9078\u629e\u57fa\u6e96\u3068\u3068\u3082\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002.<\/p>\n<p>\u30af\u30a4\u30c3\u30af\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\uff1a <a href=\"#comparison\">\u6bd4\u8f03<\/a> | <a href=\"#24vdc-design\">24V DC\u8a2d\u8a08<\/a> | <a href=\"#220vac-apps\">220V AC\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/a> | <a href=\"#hazardous\">\u5371\u967a\u533a\u57df<\/a> | <a href=\"#selection\">\u9078\u8003\u30d7\u30ed\u30bb\u30b9<\/a> | <a href=\"#mistakes\">\u3088\u304f\u3042\u308b\u9593\u9055\u3044<\/a><\/p>\n<h2 id=\"comparison\">1. 24V DC\u3068220V AC\uff1a\u4e3b\u306a\u9055\u3044<\/h2>\n<p>24V DC\u3068220V AC\u306e\u3069\u3061\u3089\u3092\u9078\u3076\u304b\u306f\u3001\u5b89\u5168\u8981\u4ef6\u3001\u6d88\u8cbb\u96fb\u529b\u3001\u8a2d\u7f6e\u74b0\u5883\u306b\u3088\u3063\u3066\u6c7a\u307e\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u57fa\u672c\u7684\u306a\u6bd4\u8f03\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<table style=\"width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 14px;\">\n<tbody>\n<tr style=\"background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: white;\">\n<th style=\"padding: 12px; border: 1px solid #ddd; text-align: left;\">\u7279\u5fb4<\/th>\n<th style=\"padding: 12px; border: 1px solid #ddd; text-align: left;\">24V DC<\/th>\n<th style=\"padding: 12px; border: 1px solid #ddd; text-align: left;\">220V AC<\/th>\n<\/tr>\n<tr style=\"background: #f8f9ff;\">\n<td style=\"padding: 12px; border: 1px solid #ddd;\"><strong>\ud83d\udd12 \u5b89\u5168\u8b1b\u7fd2<\/strong><\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">SELV (\u8d85\u4f4e\u96fb\u5727)\u3001\u6700\u5c0f\u9650\u306e\u885d\u6483\u30ea\u30b9\u30af<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">\u5371\u967a\u306a\u96fb\u5727\u306e\u305f\u3081\u3001\u7d76\u7e01\u4fdd\u8b77\u304c\u5fc5\u8981\u3067\u3059\u3002<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px; border: 1px solid #ddd;\"><strong>\ud83d\udee1\ufe0f \u672c\u8cea\u7684\u5b89\u5168\u6027<\/strong><\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">\u2705 Ex ia\/ib\uff08\u5b89\u5168\u30d0\u30ea\u30a2\u4ed8\u304d\uff09\u306b\u5bfe\u5fdc<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">\u274c \u672c\u8cea\u5b89\u5168\u9632\u7206\u69cb\u9020\u306b\u306f\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u305b\u3093<\/td>\n<\/tr>\n<tr style=\"background: #f8f9ff;\">\n<td style=\"padding: 12px; border: 1px solid #ddd;\"><strong>\ud83d\udce1\u4fe1\u53f7\u5e72\u6e09<\/strong><\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">\u2705 50Hz EMI\u306a\u3057\u3001\u30a2\u30ca\u30ed\u30b0\u4fe1\u53f7\u306b\u5b89\u5168<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">\u26a0\ufe0f 50Hz\u306e\u78c1\u5834\u3092\u767a\u751f\u3055\u305b\u308b\u305f\u3081\u3001\u5468\u56f2\u3068\u306e\u63a5\u89e6\u3092\u907f\u3051\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px; border: 1px solid #ddd;\"><strong>\ud83d\udd0c 2\u7dda\u5f0f\u30eb\u30fc\u30d7<\/strong><\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">\u2705 4-20mA 2\u7dda\u5f0f\u306b\u5b8c\u5168\u5bfe\u5fdc<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">\u274c \u30b5\u30dd\u30fc\u30c8\u5bfe\u8c61\u5916\u3001\u5225\u9014\u96fb\u6e90\u3068\u4fe1\u53f7\u304c\u5fc5\u8981\u3067\u3059<\/td>\n<\/tr>\n<tr style=\"background: #f8f9ff;\">\n<td style=\"padding: 12px; border: 1px solid #ddd;\"><strong>\u26a1 \u30d1\u30ef\u30fc\u30ec\u30f3\u30b8<\/strong><\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">\u4f4e\u6d88\u8cbb\u96fb\u529b\uff1a\u9001\u4fe1\u6a5f\u3001\u4f4d\u7f6e\u6c7a\u3081\u88c5\u7f6e\uff08\u6a19\u6e961W\u672a\u6e80\uff09<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">\u9ad8\u51fa\u529b\u6a5f\u5668\uff1a\u5206\u6790\u8a08\u3001\u6d41\u91cf\u8a08\u3001\u30d2\u30fc\u30c8\u30c8\u30ec\u30fc\u30b9\uff085W\u4ee5\u4e0a\uff09<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px; border: 1px solid #ddd;\"><strong>\ud83d\udccf \u30b1\u30fc\u30d6\u30eb\u306e\u9577\u3055<\/strong><\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">\u26a0\ufe0f 300m\u3092\u8d85\u3048\u308b\u3068\u96fb\u5727\u964d\u4e0b\u304c\u8457\u3057\u304f\u306a\u308a\u307e\u3059<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">\u2705 \u96fb\u5727\u964d\u4e0b\u304c\u6700\u5c0f\u9650\u3067\u3001\u9577\u8ddd\u96e2\u901a\u4fe1\u304c\u53ef\u80fd<\/td>\n<\/tr>\n<tr style=\"background: #f8f9ff;\">\n<td style=\"padding: 12px; border: 1px solid #ddd;\"><strong>\ud83c\udfd7\ufe0f \u30a4\u30f3\u30d5\u30e9<\/strong><\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">DC\u30b9\u30a4\u30c3\u30c1\u30f3\u30b0\u96fb\u6e90\u304c\u5fc5\u8981\u3067\u3059<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">\u914d\u96fb\u76e4\u304b\u3089\u76f4\u63a5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div style=\"background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%); color: white; padding: 15px; border-radius: 8px; margin: 20px 0;\">\n<p style=\"margin: 0; font-weight: bold;\">\u26a0\ufe0f \u91cd\u8981\u306a\u6ce8\u610f\u70b9\uff1a<\/p>\n<p style=\"margin: 5px 0 0 0;\">\u30be\u30fc\u30f30\u306e\u5371\u967a\u533a\u57df\uff08\u30bf\u30f3\u30af\u5185\u90e8\u3001\u9023\u7d9a\u7206\u767a\u6027\u96f0\u56f2\u6c17\uff09\u3067\u306f\u3001\u672c\u8cea\u5b89\u5168\u9632\u7206\u69cb\u9020\u3092\u5099\u3048\u305f24V DC\u96fb\u6e90\u306e\u307f\u4f7f\u7528\u53ef\u80fd\u3067\u3059\u3002\u30be\u30fc\u30f30\u3067\u306f\u3001\u4fdd\u8b77\u65b9\u5f0f\u306b\u95a2\u308f\u3089\u305a\u3001220V AC\u96fb\u6e90\u306e\u4f7f\u7528\u306f\u53b3\u7981\u3067\u3059\u3002.<\/p>\n<\/div>\n<h2 id=\"24vdc-design\">2. 24V DC\u30b7\u30b9\u30c6\u30e0\u8a2d\u8a08<\/h2>\n<h3>\ud83d\udd27 2.1 \u96fb\u6e90\u69cb\u6210<\/h3>\n<p>\u7523\u696d\u752824V DC\u30b7\u30b9\u30c6\u30e0\u306b\u306f\u9069\u5207\u306a\u8a2d\u8a08\u304c\u5fc5\u8981\u3067\u3059\u3002\u91cd\u8981\u306a\u30eb\u30fc\u30d7\u3084SIS\u5b89\u5168\u30b7\u30b9\u30c6\u30e0\u306b\u304a\u3044\u3066\u306f\u3001\u5197\u9577\u96fb\u6e90\u304c\u5fc5\u9808\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\ud83d\udd04 N+1\u5197\u9577\u6027:<\/strong> 2\u3064\u306e\u4e26\u5217\u96fb\u6e90\u306b\u3088\u308a\u3001\u7247\u65b9\u304c\u6545\u969c\u3057\u3066\u3082\u7d99\u7d9a\u7684\u306a\u52d5\u4f5c\u304c\u4fdd\u8a3c\u3055\u308c\u307e\u3059\u3002<\/li>\n<li><strong>\ud83d\udcca \u96fb\u529b\u54c1\u8cea:<\/strong> \u30ea\u30c3\u30d7\u30eb\u96fb\u572750mV\u672a\u6e80\u3001\u96fb\u5727\u5b89\u5b9a\u6027\u00b11%\u306e\u7523\u696d\u7528\u96fb\u6e90<\/li>\n<li><strong>\ud83d\udd0c \u30d6\u30e9\u30f3\u30c1\u4fdd\u8b77:<\/strong> \u56de\u8def\u30b0\u30eb\u30fc\u30d7\u3054\u3068\u306b\u72ec\u7acb\u3057\u305f\u30d2\u30e5\u30fc\u30ba\uff081A\/2A\uff09\u3092\u4f7f\u7528\u3059\u308b\u3002\u3059\u3079\u3066\u306e\u6a5f\u5668\u3092\u4fdd\u8b77\u3055\u308c\u3066\u3044\u306a\u30441\u3064\u306e\u30d0\u30b9\u306b\u63a5\u7d9a\u3057\u3066\u306f\u306a\u3089\u306a\u3044\u3002<\/li>\n<li><strong>\ud83d\udd0b UPS\u30d0\u30c3\u30af\u30a2\u30c3\u30d7:<\/strong> SIS\u30b7\u30b9\u30c6\u30e0\u306b\u306f\u300130\u5206\u4ee5\u4e0a\u306e\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u96fb\u6e90\u3092\u5099\u3048\u305f\u7121\u505c\u96fb\u96fb\u6e90\u88c5\u7f6e\u304c\u5fc5\u8981\u3067\u3059\u3002<\/li>\n<\/ul>\n<h3>\ud83e\uddee 2.2 \u96fb\u5727\u964d\u4e0b\u306e\u8a08\u7b97<\/h3>\n<p>\u9577\u3044\u30b1\u30fc\u30d6\u30eb\u306b\u3088\u308b24V DC\u96fb\u5727\u964d\u4e0b\u306f\u3001\u6a5f\u5668\u306e\u30b7\u30e3\u30c3\u30c8\u30c0\u30a6\u30f3\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u8a2d\u7f6e\u524d\u306b\u8a08\u7b97\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<div style=\"background: #f0f4ff; padding: 15px; border-radius: 8px; border-left: 4px solid #667eea; margin: 15px 0;\">\n<p style=\"margin: 0; font-weight: bold; color: #667eea;\">\u5f0f\uff1a<\/p>\n<p style=\"margin: 5px 0 0 0; font-family: monospace;\">\u0394V = I \u00d7 (\u03c1 \u00d7 2L \u00f7 S)<\/p>\n<\/div>\n<p><strong>\u3069\u3053\uff1a<\/strong><br \/>\n\u03c1 = 0.0172 \u03a9\u30fbmm\u00b2\/m (\u9285\u306e\u62b5\u6297\u7387)<br \/>\nL = \u7247\u9053\u8ddd\u96e2 (m)<br \/>\nS = \u30b1\u30fc\u30d6\u30eb\u65ad\u9762\u7a4d (mm\u00b2)<br \/>\nI = \u6700\u5927\u96fb\u6d41 (A)<\/p>\n<p><strong>\ud83d\udccb \u4f8b:<\/strong> \u4f1d\u9001\u8ddd\u96e2300m\u3001\u30b1\u30fc\u30d6\u30eb\u9762\u7a4d0.5mm\u00b2\u3001\u9001\u4fe1\u6a5f\u96fb\u6d4120mA<\/p>\n<ul>\n<li>\u30eb\u30fc\u30d7\u62b5\u6297: R = 0.0172 \u00d7 600 \u00f7 0.5 = <strong>20.64\u03a9<\/strong><\/li>\n<li>\u96fb\u5727\u964d\u4e0b: \u0394V = 0.020 \u00d7 20.64 = <strong>0.41V<\/strong><\/li>\n<li>\u8a08\u6e2c\u5668\u306e\u96fb\u5727\uff1a24V \u2013 0.41V = <strong>23.59V<\/strong> \u2705\uff08\u8a31\u5bb9\u7bc4\u56f2\u5185\u3001\u6700\u4f4e12V\u4ee5\u4e0a\uff09<\/li>\n<\/ul>\n<p>500m\u3092\u8d85\u3048\u308b\u8ddd\u96e2\u306e\u5834\u5408\u306f\u3001\u5b89\u5168\u30d0\u30ea\u30a2\u306e\u96fb\u5727\u964d\u4e0b\u3092\u542b\u3081\u305f\u8a08\u5668\u306e\u6700\u5c0f\u96fb\u5727\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n<h2 id=\"220vac-apps\">3. 220V AC\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b7\u30ca\u30ea\u30aa<\/h2>\n<p>220V\u4ea4\u6d41\u96fb\u6e90\u306f\u6642\u4ee3\u9045\u308c\u3067\u306f\u306a\u304f\u3001\u9ad8\u51fa\u529b\u8a08\u6e2c\u6a5f\u5668\u306b\u3068\u3063\u3066\u6700\u9069\u306a\u9078\u629e\u80a2\u3067\u3042\u308b\u3002<\/p>\n<h3>\ud83d\udd0c 3.1 \u96fb\u78c1\u6d41\u91cf\u8a08<\/h3>\n<p>\u52b1\u78c1\u30b3\u30a4\u30eb\u306e\u6d88\u8cbb\u96fb\u529b\u306f5\uff5e20W\u3067\u30012\u7dda\u5f0f4\uff5e20mA\u30eb\u30fc\u30d7\u306e480mW\u5236\u9650\u3092\u8d85\u3048\u3066\u3044\u307e\u3059\u3002\u72ec\u7acb\u3057\u305f220V AC\u96fb\u6e90\u3092\u5099\u3048\u305f4\u7dda\u5f0f\u69cb\u6210\u304c\u6a19\u6e96\u3067\u3059\u3002. <a href=\"https:\/\/www.yunrui-controls.com\/ja\/brands\/rosemount\/\">\u30ed\u30fc\u30ba\u30de\u30a6\u30f3\u30c8\u78c1\u6c17\u6d41\u91cf\u8a08<\/a> \u305d\u3057\u3066 <a href=\"https:\/\/www.yunrui-controls.com\/ja\/brands\/endress-hauser\/\">\u30a8\u30f3\u30c9\u30ec\u30b9\u30cf\u30a6\u30b6\u30fc \u30d7\u30ed\u30de\u30b0\u30b7\u30ea\u30fc\u30ba<\/a> \u901a\u5e38\u306f\u4ea4\u6d41\u96fb\u6e90\u304c\u5fc5\u8981\u3067\u3059\u3002.<\/p>\n<h3>\ud83e\uddea 3.2 \u30aa\u30f3\u30e9\u30a4\u30f3\u30a2\u30ca\u30e9\u30a4\u30b6\u30fc<\/h3>\n<p>pH\u5206\u6790\u88c5\u7f6e\u3001\u9178\u7d20\u5206\u6790\u88c5\u7f6e\u3001\u30ac\u30b9\u30af\u30ed\u30de\u30c8\u30b0\u30e9\u30d5\u306b\u306f\u3001\u52a0\u71b1\u30e2\u30b8\u30e5\u30fc\u30eb\u3001\u30b5\u30f3\u30d7\u30eb\u30dd\u30f3\u30d7\u3001\u30c7\u30a3\u30b9\u30d7\u30ec\u30a4\u306a\u3069\u304c\u542b\u307e\u308c\u3066\u304a\u308a\u300150\uff5e200W\u306e\u96fb\u529b\u3092\u6d88\u8cbb\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u88c5\u7f6e\u306f\u300124V DC\u96fb\u6e90\u3067\u306f\u975e\u73fe\u5b9f\u7684\u306a\u96fb\u6d41\u5024\u3067\u52d5\u4f5c\u3055\u305b\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002.<\/p>\n<h3>\ud83d\udd25 3.3 \u96fb\u6c17\u30d2\u30fc\u30c8\u30c8\u30ec\u30fc\u30b9<\/h3>\n<p>\u5bd2\u51b7\u5730\u3067\u306e\u8a2d\u7f6e\u306b\u306f\u3001\u52a0\u71b1\u5f0f\u30a4\u30f3\u30d1\u30eb\u30b9\u30e9\u30a4\u30f3\u3068\u7b50\u4f53\u304c\u5fc5\u8981\u3067\u3059\u3002\u30d2\u30fc\u30c8\u30c8\u30ec\u30fc\u30b9\u306f\u6570\u767e\u30ef\u30c3\u30c8\u306e\u62b5\u6297\u8ca0\u8377\u3068\u306a\u308b\u305f\u3081\u3001\u5b9f\u7528\u7684\u306a\u306e\u306f220V\u4ea4\u6d41\u96fb\u6e90\u306e\u307f\u3067\u3059\u3002.<\/p>\n<h3>\u2699\ufe0f 3.4 \u5927\u578b\u30a2\u30af\u30c1\u30e5\u30a8\u30fc\u30bf<\/h3>\n<p>\u305d\u306e\u9593 <a href=\"https:\/\/www.yunrui-controls.com\/ja\/products\/fisher-fieldvue-dvc6200\/\">\u30d5\u30a3\u30c3\u30b7\u30e3\u30fcDVC6200\u30dd\u30b8\u30b7\u30e7\u30ca\u30fc<\/a> 24V DC\u3092\u4f7f\u7528\u3057\u307e\u3059\u304c\u3001\u96fb\u6c17\u6cb9\u5727\u30a2\u30af\u30c1\u30e5\u30a8\u30fc\u30bf\u304a\u3088\u3073\u9ad8\u51fa\u529b\u30bd\u30ec\u30ce\u30a4\u30c9\u30d0\u30eb\u30d6\u306e\u30e2\u30fc\u30bf\u30fc\u99c6\u52d5\u306b\u306f220V AC\u304c\u5fc5\u8981\u3067\u3059\u3002.<\/p>\n<div style=\"background: linear-gradient(135deg, #feca57 0%, #ff9f43 100%); color: #333; padding: 15px; border-radius: 8px; margin: 20px 0;\">\n<p style=\"margin: 0; font-weight: bold;\">\u26a0\ufe0f \u5b89\u5168\u8981\u4ef6:<\/p>\n<p style=\"margin: 5px 0 0 0;\">220V\u4ea4\u6d41\u8a08\u88c5\u6a5f\u5668\u306e\u8a2d\u7f6e\u307e\u305f\u306f\u4fdd\u5b88\u306f\u3001\u8cc7\u683c\u3092\u6709\u3059\u308b\u96fb\u6c17\u6280\u5e2b\u306e\u307f\u304c\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u5371\u967a\u533a\u57df\u7528\u7b50\u4f53\u306f\u3001Ex d\u307e\u305f\u306fEx e\u306e\u8a8d\u8a3c\u3092\u53d6\u5f97\u3057\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<\/div>\n<h2 id=\"hazardous\">4. \u5371\u967a\u533a\u57df\u306b\u304a\u3051\u308b\u96fb\u6e90\u4f9b\u7d66\u306b\u95a2\u3059\u308b\u898f\u5247<\/h2>\n<table style=\"width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 14px;\">\n<tbody>\n<tr style=\"background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%); color: white;\">\n<th style=\"padding: 12px; border: 1px solid #ddd; text-align: left;\">\u4fdd\u8b77\u30bf\u30a4\u30d7<\/th>\n<th style=\"padding: 12px; border: 1px solid #ddd; text-align: left;\">\u30de\u30fc\u30ad\u30f3\u30b0<\/th>\n<th style=\"padding: 12px; border: 1px solid #ddd; text-align: left;\">\u8a31\u5bb9\u96fb\u5727<\/th>\n<th style=\"padding: 12px; border: 1px solid #ddd; text-align: left;\">\u30be\u30fc\u30f3<\/th>\n<\/tr>\n<tr style=\"background: #fff5f5;\">\n<td style=\"padding: 12px; border: 1px solid #ddd;\">\ud83d\udee1\ufe0f \u672c\u8cea\u7684\u5b89\u5168\u6027<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\"><strong>Ex ia\/ib<\/strong><\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">\u2705 24V DC\u5c02\u7528\uff08\u5b89\u5168\u30d0\u30ea\u30a2\u4ed8\u304d\uff09<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">\u30be\u30fc\u30f30\u30011\u30012<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">\ud83d\udd25 \u8010\u706b\u6027<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\"><strong>\u5143d<\/strong><\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">24V DC\u307e\u305f\u306f220V AC<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">\u30be\u30fc\u30f31\u30012<\/td>\n<\/tr>\n<tr style=\"background: #fff5f5;\">\n<td style=\"padding: 12px; border: 1px solid #ddd;\">\u26a1 \u5b89\u5168\u6027\u306e\u5411\u4e0a<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\"><strong>EXE<\/strong><\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">24V DC\u307e\u305f\u306f220V AC<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">\u30be\u30fc\u30f31\u30012<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">\ud83d\udca8 \u52a0\u5727<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\"><strong>\u4f8b p<\/strong><\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">\u4efb\u610f\u306e\u96fb\u5727<\/td>\n<td style=\"padding: 12px; border: 1px solid #ddd;\">\u30be\u30fc\u30f31\u30012<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 id=\"selection\">5. \u96fb\u6e90\u9078\u5b9a\u30d7\u30ed\u30bb\u30b9<\/h2>\n<p>\u6b63\u3057\u3044\u96fb\u5727\u3092\u9078\u629e\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u624b\u9806\u306b\u5f93\u3063\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<div style=\"background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%); padding: 20px; border-radius: 10px; margin: 20px 0;\">\n<ol style=\"margin: 0; padding-left: 20px;\">\n<li><strong>\ud83d\udcd6 \u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044:<\/strong> \u6a5f\u5668\u304c\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u96fb\u5727\u7bc4\u56f2\u3092\u30e1\u30fc\u30ab\u30fc\u306b\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<li><strong>\ud83d\uddfa\ufe0f \u30be\u30fc\u30f3\u306e\u6c7a\u5b9a:<\/strong> \u30be\u30fc\u30f30 \u2192 24V DC\u672c\u8cea\u5b89\u5168\u9632\u7206\u69cb\u9020\u304c\u5fc5\u9808\u3002\u30be\u30fc\u30f31\/2 \u2192 \u9069\u5207\u306a\u4fdd\u8b77\u3092\u5099\u3048\u305f\u30d5\u30ec\u30ad\u30b7\u30d6\u30eb\u914d\u7dda\u3002<\/li>\n<li><strong>\u26a1 \u96fb\u529b\u306e\u8a08\u7b97:<\/strong> 1W\u672a\u6e80 \u2192 24V DC 2\u7dda\u5f0f\u30011\uff5e20W \u2192 24V DC 4\u7dda\u5f0f\u300120W\u8d85 \u2192 220V AC<\/li>\n<li><strong>\ud83d\udee1\ufe0f SIS\u8981\u4ef6:<\/strong> \u5b89\u5168\u30b7\u30b9\u30c6\u30e0\u306b\u306f\u3001\u30d7\u30ed\u30bb\u30b9\u96fb\u6e90\u304b\u3089\u9694\u96e2\u3055\u308c\u305f\u5c02\u7528\u306eUPS\u304c\u5fc5\u8981\u3067\u3059\u3002<\/li>\n<li><strong>\ud83d\udccf \u8ddd\u96e2\u3092\u78ba\u8a8d\u3059\u308b:<\/strong> 300m\u3092\u8d85\u3048\u308b\u914d\u7dda\u306b\u306f24V DC\u306e\u96fb\u5727\u964d\u4e0b\u8a08\u7b97\u304c\u5fc5\u8981\u3067\u3059<\/li>\n<li><strong>\ud83c\udfaf \u6a19\u6e96\u5316:<\/strong> \u30d7\u30ed\u30bb\u30b9\u30e6\u30cb\u30c3\u30c8\u3054\u3068\u306b\u4e00\u5b9a\u306e\u96fb\u5727\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b9\u30da\u30a2\u30d1\u30fc\u30c4\u3068\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u3092\u7c21\u7d20\u5316\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n<\/div>\n<h2 id=\"mistakes\">6. \u3088\u304f\u3042\u308b\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u4e0a\u306e\u30df\u30b9<\/h2>\n<div style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 15px; margin: 20px 0;\">\n<div style=\"background: #ffeaa7; padding: 15px; border-radius: 8px; border-left: 4px solid #fdcb6e;\">\n<p style=\"margin: 0; font-weight: bold; color: #d63031;\">\u274c \u9006\u6975\u6027DC<\/p>\n<p style=\"margin: 5px 0 0 0; font-size: 13px;\">\u9006\u63a5\u7d9a\u4fdd\u8b77\u6a5f\u80fd\u306e\u306a\u3044\u8a08\u6e2c\u5668\u306f\u6c38\u4e45\u7684\u306b\u6545\u969c\u3057\u307e\u3059\u3002\u30d7\u30e9\u30b9\u306b\u306f\u8d64\u8272\u3001\u30de\u30a4\u30ca\u30b9\u306b\u306f\u9752\/\u9ed2\u8272\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n<\/div>\n<div style=\"background: #fab1a0; padding: 15px; border-radius: 8px; border-left: 4px solid #e17055;\">\n<p style=\"margin: 0; font-weight: bold; color: #d63031;\">\u274c \u30b1\u30fc\u30d6\u30eb\u914d\u7dda\u306e\u6df7\u5728<\/p>\n<p style=\"margin: 5px 0 0 0; font-size: 13px;\">220V\u4ea4\u6d41\u30b1\u30fc\u30d6\u30eb\u306824V\u76f4\u6d41\u30b1\u30fc\u30d6\u30eb\u306f\u3001\u540c\u3058\u914d\u7ba1\u5185\u306b\u914d\u7dda\u3057\u3066\u306f\u306a\u308a\u307e\u305b\u3093\u3002\u6700\u4f4e200mm\u306e\u9593\u9694\u3092\u78ba\u4fdd\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n<\/div>\n<div style=\"background: #74b9ff; padding: 15px; border-radius: 8px; border-left: 4px solid #0984e3;\">\n<p style=\"margin: 0; font-weight: bold; color: #2d3436;\">\u274c \u63a5\u5730\u306b\u95a2\u3059\u308b\u6df7\u4e71<\/p>\n<p style=\"margin: 5px 0 0 0; font-size: 13px;\">DC\u30de\u30a4\u30ca\u30b9\u306f\u30d5\u30ed\u30fc\u30c6\u30a3\u30f3\u30b0\u307e\u305f\u306f\u63a5\u5730\u306e\u3044\u305a\u308c\u304b\u306b\u306a\u308a\u307e\u3059\u3002\u30b7\u30b9\u30c6\u30e0\u3054\u3068\u306b\u3069\u3061\u3089\u304b\u4e00\u65b9\u306e\u65b9\u6cd5\u3092\u9078\u629e\u3057\u3001\u6c7a\u3057\u3066\u6df7\u5728\u3055\u305b\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002.<\/p>\n<\/div>\n<div style=\"background: #a29bfe; padding: 15px; border-radius: 8px; border-left: 4px solid #6c5ce7;\">\n<p style=\"margin: 0; font-weight: bold; color: #2d3436;\">\u274c \u652f\u5e97\u4fdd\u8b77\u306a\u3057<\/p>\n<p style=\"margin: 5px 0 0 0; font-size: 13px;\">\u4fdd\u8b77\u3055\u308c\u3066\u3044\u306a\u3044\u30d0\u30b9\u30d0\u30fc\u3067\u77ed\u7d61\u304c\u767a\u751f\u3059\u308b\u3068\u3001\u3059\u3079\u3066\u306e\u8a08\u5668\u304c\u4f7f\u7528\u4e0d\u80fd\u306b\u306a\u308a\u307e\u3059\u30025\uff5e10\u500b\u306e\u6a5f\u5668\u3054\u3068\u306b\u30d2\u30e5\u30fc\u30ba\u3092\u53d6\u308a\u4ed8\u3051\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n<\/div>\n<\/div>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u5358\u4e00\u306e\u96fb\u5727\u304c\u666e\u904d\u7684\u306b\u512a\u308c\u3066\u3044\u308b\u308f\u3051\u3067\u306f\u306a\u3044 <strong>24V DC\u3068220V AC\u306e\u8a08\u6e2c\u6a5f\u5668\u7528\u96fb\u6e90<\/strong>. \u9069\u5207\u306a\u9078\u629e\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u8981\u4ef6\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u2705 24V DC:<\/strong> \u6a19\u6e96 <a href=\"https:\/\/www.yunrui-controls.com\/ja\/product_cat\/transmitters\/pressure-transmitters\/\">\u5727\u529b\u30c8\u30e9\u30f3\u30b9\u30df\u30c3\u30bf\u30fc<\/a>, <a href=\"https:\/\/www.yunrui-controls.com\/ja\/product_cat\/transmitters\/temperature-transmitters\/\">\u6e29\u5ea6\u30c8\u30e9\u30f3\u30b9\u30df\u30c3\u30bf\u30fc<\/a>, <a href=\"https:\/\/www.yunrui-controls.com\/ja\/product_cat\/valve-positioners\/\">\u30d0\u30eb\u30d6\u30dd\u30b8\u30b7\u30e7\u30ca\u30fc<\/a>, \u304a\u3088\u3073\u30ec\u30d9\u30eb\u8a08\u3002\u5b89\u5168\u6027\u3001\u8010\u5e72\u6e09\u6027\u3001\u304a\u3088\u3073\u672c\u8cea\u5b89\u5168\u9632\u7206\u9069\u5408\u6027\u306e\u89b3\u70b9\u304b\u3089\u63a8\u5968\u3055\u308c\u307e\u3059\u3002.<\/li>\n<li><strong>\u2705 220V AC:<\/strong> \u5fc5\u8981 <a href=\"https:\/\/www.yunrui-controls.com\/ja\/product_cat\/flow-meters\/electromagnetic-flow-meters\/\">\u96fb\u78c1\u6d41\u91cf\u8a08<\/a>, \u30aa\u30f3\u30e9\u30a4\u30f3\u5206\u6790\u88c5\u7f6e\u3001\u30d2\u30fc\u30c8\u30c8\u30ec\u30fc\u30b9\u3001\u5927\u578b\u30a2\u30af\u30c1\u30e5\u30a8\u30fc\u30bf\u306a\u3069\u3002\u76f4\u63a5\u30b0\u30ea\u30c3\u30c9\u63a5\u7d9a\u306b\u3088\u308a\u3001\u76f4\u6d41\u30a4\u30f3\u30d5\u30e9\u304c\u4e0d\u8981\u306b\u306a\u308a\u307e\u3059\u3002.<\/li>\n<li><strong>\ud83d\udee1\ufe0f\u5371\u967a\u533a\u57df\uff1a<\/strong> \u30be\u30fc\u30f30\u3067\u306f\u3001\u5b89\u5168\u30d0\u30ea\u30a2\u3092\u4f7f\u7528\u3057\u3066\u96fb\u5727\u309224V DC\u306b\u5236\u9650\u3057\u307e\u3059\u3002\u30be\u30fc\u30f31\/2\u3067\u306f\u3001\u9632\u7206\u578b\u307e\u305f\u306f\u5f37\u5316\u3055\u308c\u305f\u5b89\u5168\u7b50\u4f53\u3092\u4f7f\u7528\u3057\u3066220V AC\u3092\u8a31\u53ef\u3057\u307e\u3059\u3002.<\/li>\n<\/ul>\n<h2>\u95a2\u9023\u6587\u732e<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.yunrui-controls.com\/ja\/4-20ma-signal-industrial-automation\/\">\u7523\u696d\u30aa\u30fc\u30c8\u30e1\u30fc\u30b7\u30e7\u30f3\u306b\u304a\u3051\u308b4-20mA\u4fe1\u53f7\uff1a\u539f\u7406\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/a><\/li>\n<li><a href=\"https:\/\/www.yunrui-controls.com\/ja\/fisher-dvc6200-dvc2000-feedback-troubleshooting\/\">Fisher DVC6200\/DVC2000 \u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u4fe1\u53f7\u306e\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/a><\/li>\n<li><a href=\"https:\/\/www.yunrui-controls.com\/ja\/valve-positioner-working-principle-troubleshooting\/\">\u30d0\u30eb\u30d6\u30dd\u30b8\u30b7\u30e7\u30ca\u30fc\u5b8c\u5168\u30ac\u30a4\u30c9\uff1a\u52d5\u4f5c\u539f\u7406\uff0b\u73fe\u5834\u3067\u306e\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/a><\/li>\n<li><a href=\"https:\/\/www.yunrui-controls.com\/ja\/control-valve-cv-calculation-actuator-sizing\/\">\u30a2\u30af\u30c1\u30e5\u30a8\u30fc\u30bf\u306e\u9078\u5b9a\u3068\u30d0\u30eb\u30d6\u306e\u30b5\u30a4\u30ba\u6c7a\u5b9a\uff1a\u5de5\u5b66\u7684\u8a08\u7b97\u65b9\u6cd5<\/a><\/li>\n<li><a href=\"https:\/\/www.yunrui-controls.com\/ja\/radar-level-transmitter-frequency-guide\/\">\u30ec\u30fc\u30c0\u30fc\u30ec\u30d9\u30eb\u9001\u4fe1\u6a5f\u5468\u6ce2\u6570\u30ac\u30a4\u30c9<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Choosing between 24V DC and 220V AC instrument power supply is a critical decision in industrial automation. The wrong voltage can create safety hazards, signal interference, or equipment failure. This guide explains when to use 24V DC versus 220V AC for industrial instruments, with practical selection criteria for real field applications. Quick Navigation: Comparison | [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":8444,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[384,1],"tags":[],"class_list":["post-8443","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","category-blogs"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.8 (Yoast SEO v26.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>24V DC vs 220V AC Instrument Power Supply - YUNRUI<\/title>\n<meta name=\"description\" content=\"echnical guide for selecting 24V DC or 220V AC power supplies for industrial instruments. 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