Monitoring Relays
1-Phase True RMS AC/DC Over or Under Voltage
Type DUB71
• TRMS AC/DC over or under voltage
monitoring relays
• Selection of measuring range by DIP-switches
• Measuring ranges from 0.1 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: 5 A SPDT relay N.D. or N.E. selectable
• For mounting on DIN-rail in accordance with
DIN/EN 50 022
• 35.5 mm DIN-rail housing
• LED indication for relay, alarm and power supply ON
Product Description Ordering Key
DUB71 is a precise TRMS
AC/DC over or under voltage
(selectable by DIP-switch)
monitoring relay.
Owing to the built-in latch
function, the ON-position of
elay output can be
the r
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.
35.5 mm wide housing suitable both for back and fr
panel mounting.
Housing
Function
Type
Item number
Output
Power supply
ont
Range
DUB 71 C B23 10V
Type Selection
Mounting Output Measuring range Supply: 24/48 VAC Supply: 115/230 VAC
DIN-rail SPDT 0.1 to 10 V AC/DC DUB 71 C B48 10V DUB 71 C B23 10V
DIN-rail SPDT 2 to 500 V AC/DC DUB 71 C B48 500V DUB 71 C B23 500V
Input Specifications
Input
oltage level Terminals Y1, Y2
V
Measuring ranges
..10V:
..500V
Contact input T
Disabled > 10 kΩ
Enabled < 500 Ω
Latch disable > 500 ms
0.1 to 1 V AC/DC >120 kΩ 100 V
0.2 to 2 V AC/DC
0.5 to 5 V AC/DC
1 to 10 V AC/DC >120 kΩ 100 V
Max. voltage for 1 s 200 V
:
2 to 20 V AC/DC
5 to 50 V AC/DC 500 kΩ 350 V
20 to 200 V AC/DC
50 to 500 V AC/DC 500 kΩ 600 V
Max. voltage for 1 s 1000 V
Internal resist. Max. volt.
>120 kΩ
Ω 100 V
>120 k
500 kΩ
500 k
Ω 600 V
erminals Z1, Y1
100 V
350 V
Output Specifications
Output SPDT relay
Rated insulation voltage 250 VAC
Contact ratings (AgSnO
Resistive loads AC 1 5 A @ 250 VAC
Small inductive loads AC 15 2.5 A @ 250 VAC
Mechanical life ≥ 30 x 106operations
Electrical life ≥ 10
Operating frequency ≤
Dielectric strength
Dielectric voltage
Rated impulse withstand volt. 4 kV (1.2/50 µs)
)µ
2
DC 12 5 A @ 24 VDC
DC 13 2.5 A @ 24 VDC
5
operations
(at 5 A, 250 V, cos ϕ = 1)
7200 operations/h
AC (rms)
2 kV
Supply Specifications
Power supply Over
Rated operational voltage (IEC 60664, IEC 60038)
ough terminals:
thr
A1, A2 or A3, A2
B48: 24/48 VAC ± 15%
B23: 115/230 VAC ± 15%
voltage cat. III
45 to 65 Hz, insulated
45 to 65 Hz, insulated
Dielectric voltage AC supply
Supply to input 4 kV (1.2/50µs)
Supply to output 4 kV (1.2/50µs)
Input to output 4 kV (1.2/50µs)
Rated operational power
AC
3 VA
1
DUB71
General Specifications
ower ON delay
P
Reaction time (input signal variation from
Alarm ON delay < 100 ms
larm OFF delay < 100 ms
A
Accuracy (15 min warm-up time)
Temperature drift ± 1000 ppm/°C
elay ON alarm ± 10% on set value ± 50 ms
D
epeatability ± 0.5% on full-scale
R
Indication for
Power supply ON LED, green
Alarm ON LED, red (flashing 2 Hz
Output relay ON LED, yellow
Environment
Degree of protection IP 20
Pollution degree 3
Operating temperature -20 to 60°C, R.H. < 95%
Storage temperature -30 to 80°C, R.H. < 95%
Housing dimensions 35.5 x 81 x 67.2 mm
Weight Approx. 150 g
Screw terminals
Tightening torque Max. 0.5 Nm
Approvals UL, CSA
CE Marking Yes
EMC
Immunity According to EN 61000-6-2
Emission According to EN 61000-6-3
s ± 0.5 s or 6 s ± 0.5 s
1
-20% to +20% or from
+20% to -20% of set value)
during delay time)
acc. to IEC 60947
Electromagnetic Compatibillity
Mode of Operation
DUB71 monitor both AC and
DC over or under voltage.
Example 1
(no connection between terminals Z1, Y1 - latch function disabled)
The relay operates when the
measured value exceeds (or
drops below) the set level for
more than the set delay
time.
It releases when the voltage
drops below (or exceeds)
the set level (see hysteresis
setting), or when power supply is interrupted.
Example 2
(connection between terminals Z1, Y1 - latch function
enabled)
The relay operates and
latches in operating position
when the measured value
exceeds (or drops below)
the set level for more than
the set delay time.
Provided that the voltage
has dropped below (or has
exceeded) the set point (see
hysteresis setting) the relay
releases when the interconnection between terminals
Z1, Y1 is interrupted, or
power supply is interrupted
as well.
The yellow LED flashes until
he delay time has expired
t
or the measured value has
dropped below the set point
(see hysteresis setting).
Note
When the inhibit contact is
opened, if the input signal is
already in alarm position, the
delay time needs to elapse
before relay activation.
Function/Range/Level and Time Delay Setting
Adjust the input range setting the DIP switches 1 and
2 as shown below.
Select the desired function
setting the DIP switches 3 to
6 as shown below.
To access the DIP switches
open the gr
as shown below.
Selection of level and time
delay:
Upper knob:
Setting of hysteresis on relative scale: 0 to 30% on set
value.
Centr
oltage level setting on r
V
tive scale: 10 to 110% on
full scale.
ey plastic cover
e knob:
Lower knob:
Setting of delay on alarm
time on absolute scale (0.1
to 30 s).
-
ela
Measuring range
Model 500 V 10 V
ON OFF 20 V 1 V
OFF OFF 50 V 2 V
ON 200 V
ON
OFF ON
Relay working mode
ON: Normally De-Energized
OFF: Normally Energized
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
Monitoring function
ON:
OFF: Under voltage
500 V
Over voltage
5 V
10 V
2
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