{"product_id":"murphy-by-enovation-controls-518aph-12-tattletale-25700147-closed-loop-signaling-relay","title":"Murphy by Enovation Controls 518APH-12 Tattletale (25700147) | Closed-Loop Signaling Relay","description":"\u003csection\u003e\n  \u003ch2\u003eOverview\u003c\/h2\u003e\n  \u003cp\u003eThe Murphy 518APH-12 Tattletale from Murphy by Enovation Controls delivers a compact, dependable way to manage safety signaling in diesel and ignition applications. This 12 volt model uses a manual reset and a closed loop wiring approach that connects Swichgage and NC contacts in series to monitor circuit status and trigger protective actions when a fault is detected. The unit provides clear control outputs through NCH and NOH contacts, with the latched state powered by a dedicated energize‑to‑latch mechanism to prevent unintended changes.\u003c\/p\u003e\n  \u003cp\u003eIn practice, the device presents two hot outputs depending on state: a hot output on the NCH contact when latched, and a hot output on the NOH contact when tripped. The design emphasizes robust signaling in industrial environments while keeping wiring straightforward for installation alongside existing safety circuits.\u003c\/p\u003e\n\n  \u003ch3\u003eKey benefits and capabilities\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eWired closed loop with Swichgage or NC contacts for compact fault signaling\u003c\/li\u003e\n    \u003cli\u003e12 V control with a manual reset and a clear latch indication\u003c\/li\u003e\n    \u003cli\u003eDurable contacts rated up to 10 A at 24 V, with a 14 A fuse included\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003ePractical applications\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eIdeal for distributor ignition or diesel engine monitoring where a latch prevents inadvertent restarts\u003c\/li\u003e\n    \u003cli\u003eUseful for integrating with existing safety circuits to provide a fail safe output if a fault occurs\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation tips and notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eVerify the closed loop wiring configuration and ensure the latch remains energized for reliable status indication\u003c\/li\u003e\n    \u003cli\u003eUse the included fuse to protect the control circuit against nuisance trips\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp\u003eWhile the tattletale is designed to support signaling in demanding environments, actual results depend on the specific wiring and operating context. Review system requirements and wiring diagrams when planning installation to align with your safety goals.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What is the Murphy 518APH-12 Tattletale and how does it work?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: A compact unit that wires Swichgage or NC contacts in a closed loop with a manual reset, using NCH and NOH outputs to signal status.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What are the key electrical specs and usage notes?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Contacts rated 10 A at 24 V, 14 A fuse included; latch energizes to hold state, suitable for diesel engine monitoring when wired per diagrams.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Murphy by Enovation Controls","offers":[{"title":"Default Title","offer_id":42465949155413,"sku":"B07SF7GD57","price":91.07,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/3270\/4597\/files\/murphy-by-enovation-controls-518aph-12-tattletale-closeup.jpg?v=1778029854","url":"https:\/\/plentytorque.co.uk\/products\/murphy-by-enovation-controls-518aph-12-tattletale-25700147-closed-loop-signaling-relay","provider":"PlentyTorque","version":"1.0","type":"link"}