Specifications are subject to change without notice (10.06.10) 1
Monitoring Relays
Product Description Ordering Key
Housing
Function
Type
Item number
Output
Power supply
Range
• TRMS AC/DC over+under, over+over or
under+under voltage monitoring relays
• Selection of measuring range by DIP-switches
• Measuring ranges from 2 to 500 V AC/DC
• Adjustable voltage on relative scale
• Adjustable hysteresis on relative scale
• Adjustable delay function (0.1 to 30 s)
•Programmable latching or inhibit at set level
• Output: 1 or 2 x 8 A SPDT relay N.D. or N.E. selectable
• For mounting on DIN-rail in accordance with
DIN/EN 50 022 (DUC01) or plug-in module (PUC01)
• 45 mm Euronorm housing (DUC01)
or 36 mm plug-in module (PUC01)
• LED indication for relay, alarm and power supply ON
• Galvanically separated power supply
Type Selection
Input (voltage level)
DUC01 Terminals Y1, Y2
PUC01 Terminals 5, 7
Measuring ranges
Direct Internal resist. Max. volt.
Selectable by DIP-switch
2to 20 V AC/DC >500 kΩ350 V
5to 50 V AC/DC > 500 kΩ350 V
20 to 200 V AC/DC >500 kΩ600 V
50 to 500 V AC/DC > 500 kΩ600 V
Max. voltage for 1 s 1000 V
Note:
The input voltage cannot
raise over 300 VAC/DC
with respect to ground
(PUC01 only)
Contact input
DUC01 Terminals Z1, Y1
PUC01 Terminals 8, 9
Disabled > 10 kΩ
Enabled < 500 Ω
Latch disable >500 ms
1-Phase True RMS AC/DC Over and Under Voltage
Types DUC01, PUC01
Input Specifications
Output 2 x SPDT relays (DUC01)
1 x SPDT relays (PUC01)
Rated insulation voltage 250 VAC
Contact ratings (AgSnO2)µ
Resistive loads AC 1 8 A @ 250 VAC
DC 12 5 A @ 24 VDC
Small inductive loads AC 15 2.5 A @ 250 VAC
DC 13 2.5 A @ 24 VDC
Mechanical life ≥30 x 106operations
Electrical life ≥105operations
(at 8 A, 250 V
,cos ϕ=1)
Operating frequency ≤7200 operations/h
Dielectric strength
Dielectric voltage
≥2kVAC (rms)
Rated impulse withstand volt. 4 kV (1.2/50 µs)
Output Specifications
DUC 01 D B23 500V
DUC01 and PUC01 are pre-
cise TRMS AC/DC
over+under,over+over or
under+under voltage
(selectable by DIP-switch)
monitoring relays. The volt-
age levels areadjustable
separately and have their
own time delay.
Owing to the built-in latch
function, the ON-position of
the relay output can be
maintained. 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.
DUC01 PUC01
Mounting Output Supply: 24 to 48 VAC/DC Supply: 115/230 VAC
DIN-rail 2xSPDT DUC 01 D D48 500V DUC 01 D B23 500V
Plug-in SPDT PUC 01 C D48 500V PUC 01 C B23 500V
2Specifications are subject to change without notice (10.06.10)
DUC01, PUC01
Mode of Operation
DUC01 and PUC01 monitor
both AC and DC
over+under, over+over or
under+under voltage.
Example 1
(no contact input -
under+over voltage - 2 x
SPDT relays (1 x SPDT for
PUC01))
DUC01: One relay operates
when the voltage drops
below the under voltage set
point for more than the
respective delay time. It
releases when the voltage
exceeds the set level plus
the set hysteresis. The other
relay operates when the
voltage exceeds the over
voltage set point for more
than the respective delay
time. It releases when the
voltage drops below the set
level minus hysteresis (the
hysteresis is the same for
both set levels).
PUC01: The relay operates
when the voltage drops
below the under voltage set
level for more than the
respective set delay time or
when it exceeds the over
voltage set level for more
than the respective set delay
time. The relay releases
when the voltage exceeds
the under voltage set level
plus hysteresis and it drops
below the over voltage set
level minus hysteresis (the
hysteresis is the same for
both set levels).
Example 2
(latch enabled active -
under+ under voltage - 2 x
SPDT relays (1 x SPDT for
PUC01))
DUC01: Each relay operates
and latches when the volt-
age drops below the respec-
tive set level for more than
the respective delay time.
Provided that the voltage
has exceeded the respective
set level (see hysteresis),
each relay releases when the
contact input’sconnection is
interrupted.
PUC01: The relay operates
when the voltage drops
below the higher set level for
more than the respective
delay time. Provided that the
voltage has exceeded the
respective set level plus hys-
teresis, the relay releases
when the contact input is
opened.
Example 3
(inhibit enable active - over+
over voltage - DPDT relay
(1 x SPDT for PUC01))
Provided that the contact
input is opened, the relay
operates when the voltage
exceeds the lower set level
for more than the respective
delay time. It releases when
the voltage drops below the
lower set level (see hystere-
sis) or when the contact
input’spins areconnected.
Note:
When the inhibit contact is
opened, if the input signal is
already in alarm position, the
delay time needs to elapse
before relay(s) activation.
Power supply Overvoltage cat. III
Rated operational voltage (IEC 60664, IEC 60038)
through terminals:
A1, A2 or A3, A2 (DUC01)
2, 10 or 11, 10 (PUC01)
D48: 24 to 48 VAC ± 15%
45to 65 Hz, insulated
B23: 115/230 VAC ± 15%
45 to 65 Hz, insulated
Dielectric voltage DC supply AC supply
Supply to input 2 kV 4 kV
Supply to output 4 kV 4 kV
Input to output 4 kV 4 kV
Rated operational power
AC 5 VA
DC 3 W
Supply Specifications
Indication for
Power supply ON LED, green
Alarm ON LED, red (flashing 2 Hz
during delay time)
Output relay ON 1 or 2 x LED, yellow
Environment (EN 60529)
Degree of protection IP 20
Pollution degree 3 (DUC01), 2 (PUC01)
Operating temperature -20 to 60°C, R.H. < 95%
Storage temperature -30 to 80°C, R.H. < 95%
Housing
Dimensions DUC01 45 x 80 x 99.5 mm
PUC01 36 x 80 x 94 mm
Material PA66 or Noryl
Weight Approx. 250 g
Screw terminals
Tightening torque Max. 0.5 Nm
acc. to IEC 60947
Product standard EN 60255-6
Approvals UL, CSA
CE Marking L.V. Directive 2006/95/EC
EMC Directive 2004/108/EC
EMC
Immunity According to EN 60255-26
According to EN 61000-6-2
Emissions According to EN 60255-26
According to EN 61000-6-3
General Specifications (cont.)
Power ON delay 1 s ± 0.5 s or 6 s ± 0.5 s
Reaction time (input signal variation from
-20% to +20% or from
+20% to -20% of set value)
AlarmON delay <100 ms
Alarm OFF delay < 100 ms
Accuracy (15 min warm-up time)
Temperature drift ± 1000 ppm/°C
Delay ON alarm ± 10% on set value ± 50 ms
Repeatability ± 0.5% on full-scale
General Specifications
Specifications are subject to change without notice (10.06.10) 3
Function/Range/Level and Time Delay Setting
DUC01, PUC01
Adjust the input range set-
ting the DIP switches 1 and
2of the main black selector
asshown below.
Select the desired function
setting the DIP switches 3 to
6of the black selector and
1, 2 of the small red selector
as shown below.
To access the DIP switches
open the grey plastic cover
asshown below
Selection of level, time
delay and hysteresis:
Upper knob:
Setting of hysteresis on relative
scale: 0 to 30% on set value.
Centre knobs:
Voltage level setting on rela-
tive scale: 10 to 110% on
full scale.
Lower knobs:
Setting of delay on alarm time
onabsolute scale (0.1 to 30 s).
Relay(s) coupling
ON: 2 x SPDT (DUC01 only)
OFF: 1xDPDT (DUC01, PUC01)
Relay(s) working mode
ON: Normally De-Energized (ND)
OFF: Normally Energized (NE)
Power ON delay
ON: 6 s ± 0.5 s
OFF: 1 s ± 0.5 s
Contact input
ON: Latch function enable
OFF: Inhibit function enable
Set Point 1 (SP1) monitoring function
ON: Over voltage
OFF: Under voltage
Set Point 2 (SP2)
monitoring function
ON: Over voltage
OFF: Under voltage
Measuring range
ON OFF: 2 to 20 V AC/DC
OFF OFF: 5 to 50 V AC/DC
ON ON: 20 to 200 V AC/DC
OFF ON: 50 to 500 V AC/DC
Operation Diagrams
Over+over voltage - N.D. relay(s) Over+over voltage - Latch - N.D. relay(s)
Over+under voltage - N.D. relay(s) Over+under voltage - Latch - N.D. relay(s)
4Specifications are subject to change without notice (10.06.10)
Operation Diagrams (cont.)
DUC01, PUC01
Under+under voltage - N.D. relay(s)
45
80
83.5
99.5
63
28.5
36
80
94
28.5
63
90
DIN-rail Plug-in
Dimensions
Wiring Diagrams
DUC01 PUC01
24÷48 VAC/DC
230 VAC 115 VAC
24÷48 VAC/DC
230 VAC 115 VAC
24÷48 VAC/DC
230 VAC 115 VAC
24÷48 VAC/DC
230 VAC 115 VAC
