WPC offers this ALL NEW 51303940-251 Dual Fan Alarm Assembly as a replacement for the original UCN cabinet fan.

The Cabinet Fan assembly has a fan health LED to indicate normal operation of both fans. The contacts are closed when the Cabinet Fan Assembly is operating normally. The alarm signal, represented by normally open contacts, is available at the alarm terminal block. The operation of the Cabinet Fan assembly can be monitored by a 24Vdc Digital Input FTA.

We recommend using only new fans when replacing this assembly. We routinely see used fans with more than 20 years of continuous operation on them, and a questionable amount of lifetime left. The brand new fans on this assembly are a high-quality, all-metal ball-bearing fans with a speed-monitoring sensor built in.

The 120v (nominal voltage) fan for this application is
51303940-151.