{"id":7389,"date":"2023-06-30T10:38:33","date_gmt":"2023-06-30T10:38:33","guid":{"rendered":"https:\/\/raycap.de\/?post_type=product&#038;p=7389"},"modified":"2026-03-25T17:17:20","modified_gmt":"2026-03-25T17:17:20","slug":"uberwachungseinheiten","status":"publish","type":"product","link":"https:\/\/raycap.de\/en\/product\/uberwachungseinheiten\/","title":{"rendered":"Monitoring Units &#8211;  Narrow Line"},"content":{"rendered":"<p><strong>Special Features:<\/strong><\/p>\n<ul>\n<li>Narrow form factor &#8211; just 6.2 mm wide<\/li>\n<li>Up to 50 SPDs can be monitored with a pair of NMUs<\/li>\n<li>SPD failures are monitored by the receiving unit<\/li>\n<li>Each SPD has its own LED indicator for quick identification of any defect<\/li>\n<li>Used in systems ranging from 6\u2009-\u200936\u2009V DC<\/li>\n<li>Equipped with quick-connect terminals<\/li>\n<\/ul>\n<p>When placed on either end of a Narrow Line stack, the Monitoring Transmitter Unit (NMU-TX) &amp; Receiver Unit (NMU-RX) will check the status of up to 50 surge protective devices in a row. The monitoring devices have built-in LED indicators. To monitor the status of each SPD, the Transmitter Unit emits a directional light beam that travels through the individual products to the Receiver Unit.<\/p>\n<p><a href=\"https:\/\/raycap.de\/wp-content\/uploads\/2023\/06\/Product-Index.pdf\" target=\"_blank\" rel=\"noopener\">Narrow Product Cross Reference<\/a><\/p>\n<table style=\"border-collapse: collapse; width: 100%;\">\n<tbody>\n<tr>\n<td style=\"width: 50%;\"><span style=\"color: #808080;\">DATA SHEET<\/span><\/td>\n<td style=\"width: 50%;\"><span style=\"color: #808080;\">INSTALLATION INSTRUCTIONS<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 50%;\"><a href=\"https:\/\/raycap.de\/wp-content\/uploads\/2023\/06\/Monitoring-Units-Chapter-Narrow-Signal-Line-Catalog-2024.pdf\" target=\"_blank\" rel=\"noopener\">Monitoring Units for Surge Protective Devices<\/a><\/td>\n<td style=\"width: 50%;\"><a href=\"https:\/\/raycap.de\/wp-content\/uploads\/2023\/06\/708-824-300-Narrow-SIgnal-SPD-NMU_RX_TX.pdf\" target=\"_blank\" rel=\"noopener\">RayDat NMU RX &amp; TX Series<\/a><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 50%;\"><a href=\"https:\/\/raycap.de\/wp-content\/uploads\/2023\/06\/G29-01-420-RayDat-NMU-Series_RevA.pdf\" target=\"_blank\" rel=\"noopener\">RayDat NMU Series<\/a><\/td>\n<td style=\"width: 50%;\"><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Monitoring Units for Surge Protective Dvices (SPDs)<\/p>\n","protected":false},"featured_media":7384,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[101,103,93,106],"product_tag":[],"class_list":{"0":"post-7389","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-analog-signal","7":"product_cat-bussysteme-oder-digitalen","8":"product_cat-daten-signalschutz","9":"product_cat-schutz-der-dc-leistung","11":"first","12":"instock","13":"shipping-taxable","14":"product-type-simple"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Monitoring Units - Narrow Line - Raycap<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/raycap.de\/en\/product\/uberwachungseinheiten\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Monitoring Units - Narrow Line - Raycap\" \/>\n<meta property=\"og:description\" content=\"Monitoring Units for Surge Protective Dvices (SPDs)\" \/>\n<meta property=\"og:url\" content=\"https:\/\/raycap.de\/en\/product\/uberwachungseinheiten\/\" \/>\n<meta property=\"og:site_name\" content=\"Raycap\" \/>\n<meta property=\"article:modified_time\" content=\"2026-03-25T17:17:20+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/raycap.de\/wp-content\/uploads\/2023\/06\/RX-TX-composition_small.png\" \/>\n\t<meta property=\"og:image:width\" content=\"780\" \/>\n\t<meta property=\"og:image:height\" content=\"520\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/raycap.de\/en\/product\/uberwachungseinheiten\/\",\"url\":\"https:\/\/raycap.de\/en\/product\/uberwachungseinheiten\/\",\"name\":\"Monitoring Units - Narrow Line - Raycap\",\"isPartOf\":{\"@id\":\"\/en\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/raycap.de\/en\/product\/uberwachungseinheiten\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/raycap.de\/product\/uberwachungseinheiten\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/raycap.de\/wp-content\/uploads\/2023\/06\/RX-TX-composition_small.png\",\"datePublished\":\"2023-06-30T10:38:33+00:00\",\"dateModified\":\"2026-03-25T17:17:20+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/raycap.de\/en\/product\/uberwachungseinheiten\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[[\"https:\/\/raycap.de\/en\/product\/uberwachungseinheiten\/\"]]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/raycap.de\/en\/product\/uberwachungseinheiten\/#primaryimage\",\"url\":\"https:\/\/raycap.de\/wp-content\/uploads\/2023\/06\/RX-TX-composition_small.png\",\"contentUrl\":\"https:\/\/raycap.de\/wp-content\/uploads\/2023\/06\/RX-TX-composition_small.png\",\"width\":780,\"height\":520},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/raycap.de\/en\/product\/uberwachungseinheiten\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/raycap.de\/en\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Monitoring Units &#8211; 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