Fault signaling units are used in small plants where the installation of complex fault signaling systems would be too cost and labor-intensive. In the event of a fault, they enable fast fault localization of all monitoring devices and limit monitors from a central location. This increases plant availability. With the correct sensor configuration, they also provide the option of preventative maintenance.

• 4 fault signal inputs with LED
• 1 LED as centralized fault indicator
• One unit each for centralized fault indication and acoustic signaling
• With acknowledgment for acoustic indicators
• Open-/closed-circuit principle to the 4 inputs can be adjusted via jumpers X1 - X2
• A maximum of 39 5TT3 461 expansion fault signaling units can be connected to the 5TT3 460 centralized fault signaling unit
• The maximum possible cable length between 5TT3 460 centralized fault signaling units and 5TT3 461 expansion fault signaling units is approx. 100 m with a conductor cross-section of 1.5 mm².