DETAILED DESCRIPTION

DFB01.. & PFB01..

DFB01 and PFB01 are precise frequency monitoring relays. The relays monitor their own power supply from 24 to 240 VAC.
The advantage of using the latch function is that the relay can be kept energized even after the end of the alarm condition. Inhibit function can be used to avoid relay operation when not desired (maintenance, transitions).
The LED's indicate the state of the alarm and the output relay.

Specification

• Supply and metering zone: 24 - 240 V AC (Voltage measuring the frequency via supply voltage)
• Frequency metering: 48 - 70 Hz (depending on model)
• Adjustable time delay: 0.1 to 30 '' (on alarm or retrieval)
• Latching mode selection: Yes
• Output relay: 8 A 250 V AC (1 x NO + NC)
• Indications: 1 green LED for flow indicator

                              1 red LED (flashes) for timer display and
                              1 yellow LED for output relay indication

• Operating temperature limits: -20 ° C to 60 ° C