DFB01CM24 Datasheet, PDF (1/3 Pages) List of Unclassifed Manufacturers – Monitoring Relays Frequency Monitoring

Monitoring Relays
Frequency Monitoring
Types DFB01, PFB01
DFB01
PFB01
• Over/under frequency monitoring relays
• Measuring if power supply frequency is within set limits
• Measure on own power supply
• Measuring ranges
Voltage: 24 to 240 VAC
Frequency: 50 - 60 Hz
• Separately adjustable upper/lower level on relative
scale
• Adjustable delay on alarm or on recovery (0.1 to 30 s)
• Programmable latching or inhibit at set level
• Output: 8 A SPDT relay N.D. or N.E. selectable
• For mounting on DIN-rail in accordance with DIN/EN
50 022 (DFB01) or plug-in module (PFB01)
• 22.5 mm Euronorm housing (DFB01) or 36 mm
plug-in module (PFB01)
• LED indication for relay, alarm and power supply ON
Product Description
DFB01 and PFB01 are pre-
cise 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 func-
tion can be used to avoid
relay operation when not
desired (maintenance, tran-
sitions). The LED's indicate
the state of the alarm and
the output relay.
Ordering key
Housing
Function
Type
Item number
Output
Power Supply
DFB 01 C M24
Type Selection
Mounting
Output
DIN-rail
Plug-in
SPDT
SPDT
Measuring range
50-60 Hz
50-60 Hz
Supply: 24 to 240 VAC
DFB 01 C M24
PFB 01 C M24
Input Specifications
Input
Own power supply DFB01:
PFB01:
Measuring ranges
Selectable by DIP-switches
2 Hz range
50 Hz
60 Hz
10 Hz range
50 Hz
60 Hz
Contact input
DFB02
PFB02
Disabled
Enabled
Pulse width
Hysteresis
2 Hz range
10 Hz range
A1, A2 (24 to 240 VAC)
2, 10 (24 to 240 VAC)
Upper level Lower level
-0.2 to +2 Hz -2 to +0.2 Hz
49.8 to 52 Hz 48 to 50.2 Hz
59.8 to 62 Hz 58 to 60.2 Hz
-1 to +10 Hz -10 to +1 Hz
49 to 60 Hz 40 to 51 Hz
59 to 70 Hz 50 to 61 Hz
Terminals Z1, Z2
Terminals 8, 9
> 10 kΩ
< 500 Ω
> 500 ms
~ 0.05 Hz
~ 0.25 Hz
Output Specifications
Output
SPDT relay
Rated insulation voltage
250 VAC
Contact ratings (AgSnO2)
Resistive loads
AC 1
DC 12
Small inductive loads AC 15
DC 13
µ
8A @ 250 VAC
5 A @ 24 VDC
2.5 A @ 250 VAC
2.5 A @ 24 VDC
Mechanical life
≥ 30 x 10⁶ operations
Electrical life
≥ 10⁵ operations
(at 8 A, 250 V, cos ϕ = 1)
Operating frequency
≤ 7200 operations/h
Dielectric strength
Dielectric voltage
≥ 2 kVAC (rms)
Rated impulse withstand volt. 4 kV (1.2/50 µs)
Specifications are subject to change without notice (12.12.05)
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