Specifications are subject to change without notice (21.10.00) 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
Mounting Output Supply: 24 VDC Supply: 24/48 VAC Supply: 115/230 VAC
DIN-rail DPDT DUC 01 D 724 500V DUC 01 D B48 500V DUC 01 D B23 500V
Plug-in SPDT PUC 01 C 724 500V PUC 01 C B48 500V PUC 01 C B23 500V
Input
Voltage level DUC01: Terminals Y1, Y2
PUC01: Terminals 5, 7
Measuring ranges Internal resis. Max. volt.
2 to 20 V AC/DC > 500 kΩ 350 V
5 to 50 V AC/DC > 500 kΩ 350 V
20 to 200 V AC/DC > 500 kΩ 600 V
50 to 500 V AC/DC > 500 kΩ 600 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 (AgSnO
2
)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 ≥ 10
5
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)
Output Specifications
DUC 01 D B23 500V
DUC01 and PUC01 are precise TRMS AC/DC over+under,
over+over or under+under
voltage (selectable by DIPswitch) monitoring relays. The
voltage levels are adjustable
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
2 Specifications are subject to change without notice (21.10.00)
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 voltage drops below the respective 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’s connection 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 hysteresis, 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 hysteresis) or when the contact
input’s pins are connected.
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)
724: 24 VDC ± 20%, insulated
B48: 24/48 VAC ± 15%
45 to 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
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)
Alarm ON 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
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
DIN-rail version 45 x 80 x 99.5 mm
Plug-in version 36 x 80 x 87 mm
Weight Approx. 250 g
Screw terminals
Tightening torque Max. 0.5 Nm
acc. to IEC 60947
CE-Marking Ye s
General Specifications
Specifications are subject to change without notice (21.10.00) 3
Selection of measuring range:
DIP-switch selector (1 to 2)
12
2 to 20 V input range
5 to 50 V input range
20 to 200 V input range
50 to 500 V input range
Selection of function:
DIP-switch selector (3 to 6
and 1A, 2A)
3
Relay de-energized in
normal condition.
Relay energized in normal
condition.
4
Power ON delay 6 ± 0.5 s
Power ON delay 1 ± 0.5 s
5
Contact input as latch function enable. When the contact
is closed the latch function is
activated. The reset of the latch
condition occurs when the contact is open or by power down.
Contact input as inhibit of
alarm enable. When the contact is closed the relay remains
in normal position even if alarm
condition occurs
6
Set point 1 over voltage
monitoring relay. The alarm condition occurs when voltage input
is over the set point value.
Set point 1 under voltage
monitoring relay. The alarm
condition occurs when voltage
input is under the set point
value.
1A
Set point 2 over voltage
monitoring relay. The alarm
condition occurs when voltage
input is over the set point value.
Set point 2 under voltage
monitoring relay. The alarm
condition occurs when voltage
input is under the set point
value.
2A
2 x SPDT relays
(DUC01)
1 x DPDT relay
(DUC01)
Selection of level and time
delay:
Upper knob:
Setting of hysteresis on relative scale: 0 to 30% on set
value.
Centre knobs:
Current level setting on relative scale: 10 to 110% on full
scale.
Lower knobs:
Setting of delay on alarm time
on absolute scale (0.1 to 30 s).
Function/Range/Level and Time Delay Setting
DUC01, PUC01
Examples 2 and 3
Example 1
25
26 28
15
16 18
Y1
Y2
Z1
PE
U
25
26 28
µ
15
16 18
PE
Y1
Y2
Z1
U
A3
N (-)
A1
A2
L
A3
N (-)
A1
A2
L
24 VDC (+)
48/230 VAC
24/115 VAC
24 VDC (+)
48/230 VAC
24/115 VAC
µ
µ
µ
Latch/inhibit
enable
Wiring Diagrams
DUC01
PUC01
ON
ON
ON
Example 1
PE
24 VDC (+)
48/230 VAC
24/115 VAC
L
U
7
5
10
112
µ
43
1
N (-)
Latch/inhibit
enable
U
7
5
24 VDC (+)
48/230 VAC
24/115 VAC
L
10
N (-)
112
µ
43
1
Examples 2 and 3
PE
4 Specifications are subject to change without notice (21.10.00)
Over+over voltage
Over+under voltage - N.E. relay(s)
Under+under voltage
Power Supply
Power Supply
Power Supply
Set Level 1
Set Level 1
Set Level 1
Hysteresis
Hysteresis
Hysteresis
Hysteresis
Hysteresis
Hysteresis
RE1(DUC01)
RE1(DUC01)
RE1(DUC01)
RE2(DUC01)
RE2(DUC01)
RE2(DUC01)
DPDT(DUC01)/RE(PUC01)
DPDT(DUC01)/RE(PUC01)
DPDT(DUC01)/RE(PUC01)
Red LED ON
Red LED ON
Red LED ON
Set Level 2
Set Level 2
Set Level 2
1 or 6 s
1 or 6 s
1 or 6 s
1 or 6 s
1 or 6 s
1 or 6 s
1 or 6 s
1 or 6 s
1 or 6 s
T1
T1
T2
T1
TT
T1
T2
T2
T1
T
T2
T1
Over+over voltage - Latch
Over+under voltage - Inhibit - N.E. relay(s)
Power Supply
Power Supply
Latch ON
Inhibit ON
Set Level 1
Set Level 1
RE1(DUC01)
RE1(DUC01)
RE2(DUC01)
RE2(DUC01)
DPDT(DUC01)/RE(PUC01)
DPDT(DUC01)/RE(PUC01)
Red LED ON
Red LED ON
Set Level 2
Set Level 2
Hysteresis
Hysteresis
Hysteresis
Hysteresis
1 or 6 s
1 or 6 s
1 or 6 s
1 or 6 s
1 or 6 s
1 or 6 s
T1
T1
T2 T2
T1 T1
T2
T2
T1 T1
Operation Diagrams
DUC01, PUC01
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