temperature monitoring unit NT935, Entrances: It has 4 x Pt100 probe inputs 3-wire (3 for transformer phases and 1 optional for ambient temperature or core)., Relay Outputs: It is equipped with 5 output relays:, ALARM: To signal when the pre-alarm threshold has been exceeded., TRIP: For tripping the transformer when the critical temperature is reached., FAN1 and FAN2: For controlling the forced ventilation system., FAULT: For reporting internal faults or anomalies to the probes., Power supply: Universal, from 24 to 240 Vac-dc