Reflex Fenner 12M03-00126 Tach Loss and Overspeed

Fenner Reflex 12M03-00126 Tach Loss and Overspeed is a compact PC-board detector module that monitors tachometer feedback and signals a fault or overspeed condition to a drive's safety logic. Listed in Fenner Reflex/NIB Fenner Industrial Controls catalogs as a Tach Loss & Overspeed Detector Board, the 12M03-00126 is cited across distributor listings as part of the Reflex control family (some references refer to it as Model 237). This part is offered by multiple suppliers as a replacement component for Reflex Fenner drives, underscoring its role in protecting motors and equipment from tach-loss faults and overspeed events in industrial automation settings. Typical uses include industrial drive systems and automation environments where continuous tach feedback supports accurate speed regulation and safe operating envelopes, especially during acceleration and deceleration cycles. As a dedicated tach-loss/overspeed board, it integrates with Reflex safety and control modules to help prevent undetected tach signal loss or runaway speed, per the product's catalog and reseller references.