2
Specifications are subject to change without notice (12.12.05)
DFB01, PFB01
General Specifications
Power ON delay
1 s ± 0.5 s
Reaction time
(input signal variation from
-10% to +10% or from
+10% to -10% of the range)
Alarm ON delay
< 200 ms
Alarm OFF delay
< 200 ms
Accuracy
(15 min warm-up time)
Temperature drift
± 200 ppm/°C
Delay ON alarm
± 10% on set value ±50 ms
Repeatability
± 0.02 Hz
Indication for
Power supply ON
LED, green
Alarm ON
LED, red (flashing 2 Hz
during delay time)
Output relay ON
LED, yellow
Environment
Degree of protection
IP 20
Pollution degree
3 (DFB01), 2 (PFB01)
Operating temperature
-20 to 60°C, R.H. < 95%
Storage temperature
-30 to 80°C, R.H. < 95%
Housing dimensions
DIN-rail version
22.5 x 80 x 99.5 mm
Plug-in version
36 x 80 x 94 mm
Weight
Approx. 150 g
Screw terminals
Tightening torque
Max. 0.5 Nm
acc. to IEC 60947
Approvals
UL, CSA
CE-Marking
Yes
EMC
Electromagnetic Compatibility
Immunity
According to EN 61000-6-2
Emission
According to EN 61000-6-3
Mode of Operation
DFB01 and PFB01 monitor
the frequency value of their
own power supply.
Example 1
(Non-latching mode - N.D.
relay)
The relay operates and the
yellow LED is ON as soon
as the measured frequency
exceeds the upper set level
or drops below the lower set
level for more than the set
delay time. The relay releas-
es when the measured fre-
quency comes back within
the upper and lower limits.
The red LED flashes until the
delay time has expired or
the measured value falls off
the limits.
Example 2
(Latching mode - N.E. relay)
The relay operates and the
yellow LED is ON as long as
the measured frequency is
within the upper and lower
limits.
The
relay
releases
and
latches in alarm position as
soon as the measured fre-
quency exceeds the upper
set level or drops below the
lower set level for more than
the set delay time. The red
LED flashes until the delay
time
has
expired
or
the
measured value comes back
within the limits. Provided
that
the
frequency
has
dropped below the upper
set level (minus hysteresis)
or exceeded the lower set
level (plus hysteresis), the
relay
operates
when
the
interconnections
between
terminals Z1, Z2 or 8, 9 are
interrupted.
Supply Specifications
Power supply
Overvoltage cat. III
Rated operational voltage
(IEC 60664, IEC 60038)
Through terminals:
DFB01: A1, A2
24 to 240 VAC ± 15%
PFB01:
2,10
24 to 240 VAC ± 15%
Dielectric voltage
Supply to output
4 kV
Rated operational power
4 W
Adjust the system frequency
setting
DIP switch
3
and
select the desired function
setting the DIP switches 1, 2
and 4 as shown on the right.
To access the DIP switches
open the grey plastic cover
as shown on the right.
Selection of level and time
delay:
Upper knob:
Setting of upper level:
-10 to +100% of the range.
Centre knob:
Setting of lower level:
-100 to +10% of the range.
Lower knob:
Setting of delay on alarm
time: 0.1 to 30 s.
Function/Range/Level and Time Delay Setting
Setpoint range
ON: 2 Hz
OFF: 10 Hz
Relay working mode
ON: Normally De-Energized
OFF: Normally Energized
Contact input
ON: Lacth function enable
OFF: Inhibit function enable
System frequency
ON: 60 Hz
OFF: 50 Hz
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