[ { "uid": "link_contact", "linkName": "Contact", "url": "/gb/contact", "target": "_self", "classAttributes": "phone" } ]

[{"term":"Libraries_BA","id":0,"type":"QUICKLINKS"},{"term":"Instructions","id":1,"type":"QUICKLINKS"},{"term":"WAGO-I/O-PRO","id":2,"type":"QUICKLINKS"},{"term":"Building","id":3,"type":"QUICKLINKS"},{"term":"221","id":4,"type":"QUICKLINKS"}]

{ "@context" : "http://schema.org/", "@type" : "Product", "name" : "Ground resistance signaling module; Ground fault alarm via digital output; Supply voltage: 24 VDC; Module width: 18 mm", "description" : "Short description:WAGO's module signals a value falling below a non-adjustable, asymmetric isolation resistance between +24 V or 0 V of the supply voltage and ground with a potential-free (Iso OK) contact and status LED. The Iso OK contact can be evaluated via a PLC. This status is maintained until the next measurement interval.Operation with Grounded Control Circuit (Functional Potential Equalization):<ul><li>The module establishes an internal connection between the 0 V (X2.2) and ground (X2.1) connections via a semiconductor switch.</li><li>At 10 s intervals, this connection between 0 V and ground is interrupted for 0.5 s, and the isolation resistance between +24 V (X1.3) or 0 V (X2.2) of the supply voltage and earth (X2.1) is determined.</li><li>The grounding connection on the module does not meet the requirements of a protective earth terminal (PE). It serves as a functional ground. The measurement method does not involve the module establishing any permanent connection between 0 V and ground.</li></ul> Operation with Ungrounded Control Circuit<ul><li>In this operating mode, the semiconductor switch to establish a connection between 0 V (X2.2) and ground (X2.1) is deactivated. At 1 s intervals, the isolation resistance offset is determined for 0.5 s.</li><li>The module does not meet the requirements of an isolation monitoring device per EN 61557-8.</li></ul> “Iso OK” Contact: <ul><li>The potential-free contact serves the purpose of supporting evaluation (e.g., via a PLC) of looming isolation faults.</li><li>This contact must not be used to switch safety-related products that could cause the circuit to switch off.</li></ul>", "mpn" : "789-665", "sku" : "789-665", "brand" : { "@type":"Brand", "name":"WAGO" }, "manufacturer" : { "@type":"Organization", "name":"WAGO Kontakttechnik GmbH & Co. KG" }, "image" : "https://www.wago.com/medias/200-2480588-DE.jpg?context=bWFzdGVyfGltYWdlc3w0ODg4fGltYWdlL2pwZWd8YURneEwyZzRPUzh4TkRZNE1qYzJPREkwTkRjMk5pOHlNREJmTWpRNE1EVTRPRjlFUlM1cWNHY3wzZjJiYjEwNzcyZjZmMmYyMzVkZDc5Y2IyNDIzMTNjMTllODAxYzg4YzU5MWE2OTJiMTFhMDU1ZTgyNWRmNDg5", "gtin13" : "4066966120820", "category" : "Protective Devices and Protective Electronics", "url" : "https://www.wago.com/gb/protective-devices-and-protective-electronics/ground-resistance-signaling-module/p/789-665" }

[ { "id": "details", "label":"Details", "priority": 100 }, { "id": "downloads", "label":"Downloads", "priority": 90 } ,{ "id": "service", "label":"Service", "priority": 1 } ]

Item no. 789-665