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faq:intrinsic-safety [2014/11/26 16:42] (current)
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 +====== ​ Intrinsic Safety ======
 +The intrinsic safety of the NetModule Routers is implemented as follows:
 +
 +  * **NB37xx**: Both power inputs are secured by non resettable fuses (Fuse Schurter OMF125, 5A, quick acting)
 +
 +  * **NB27xx**, **NB1600**: The plus pole of the power supply is protected against internal short circuit by a PTC (Multi-fuse,​ Ihold=1.1A, Itrip=2.2A @ 23°C, 72V)