Specifications are subject to change without notice (13.10.06) 1
Monitoring Relays
Product Description Ordering Key
Housing
Function
Type
Item number
Output
Power supply
Range
• 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
Input (voltage level) Terminals Y1, Y2
Measuring ranges
Direct Internal resist. Max. volt.
Selectable by DIP-switch
..10V: 0.1 to 1 V AC/DC >120 kΩ100 V
0.2 to 2 V AC/DC >120 kΩ100 V
0.5 to 5 V AC/DC >120 kΩ100 V
1to 10 V AC/DC >120 kΩ100 V
Max. voltage for 1 s 200 V
..500V: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
Contact input Terminals Z1, Y1
Disabled > 10 kΩ
Enabled < 500 Ω
Latch disable > 500 ms
1-Phase True RMS AC/DC Over or Under Voltage
Type DUB71
Input Specifications
DUB 71 C B23 10V
DUB71 is a precise TRMS
AC/DC over or under volt-
age (selectable by DIP-
switch) monitoring relay.
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.
35.5 mm wide housing suit-
able both for back and front
panel mounting.
Type Selection
Output SPDT relay
Rated insulation voltage 250 VAC
Contact ratings (AgSnO2)µ
Resistive loads AC 1 5 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 5 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
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
Power supply Overvoltage cat. III
Rated operational voltage (IEC 60664, IEC 60038)
through terminals:
A1, A2 or A3, A2
B48: 24/48 VAC ± 15%
45 to 65 Hz, insulated
B23: 115/230 VAC ± 15%
45 to 65 Hz, insulated
Supply Specifications
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 3VA
2Specifications are subject to change without notice (13.10.06)
DUB71
Mode of Operation
DUB71 monitor both AC and
DC over or under voltage.
Example 1
(no connection between ter-
minals Z1, Y1 - latch func-
tion 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 sup-
ply is interrupted.
Example 2
(connection between termi-
nals 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 intercon-
nection between terminals
Z1, Y1 is interrupted, or
power supply is interrupted
as well.
The yellow LED flashes until
the delay time has expired
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.
Power ON delay 1s± 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 LED, yellow
General Specifications
Adjust the input range set-
ting 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 grey plastic cover
as shown below.
Selection of level and time
delay:
Upper knob:
Setting of hysteresis on rela-
tive scale: 0 to 30% on set
value.
Centre knob:
Voltage level setting on rela-
tive scale: 10 to 110% on
full scale.
Lower knob:
Setting of delay on alarm
time on absolute scale (0.1
to 30 s).
Function/Range/Level and Time Delay Setting
Relay working mode
ON: Normally De-Energized
OFF: Normally Energized
Measuring range
Model 500 V 10 V
ON OFF 20 V 1 V
OFF OFF 50 V 2 V
ON ON 200 V 5 V
OFF ON 500 V 10 V
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: Over voltage
OFF: Under voltage
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
Material PA 66
Weight Approx. 150 g
Screw terminals
Tightening torque Max. 0.5 Nm
acc. to IEC 60947
Approvals UL, CSA
CE Marking Yes
EMC
Electromagnetic Compatibillity
Immunity According to EN 61000-6-2
Emission According to EN 61000-6-3
Specifications are subject to change without notice (13.10.06) 3
DUB71
Operation Diagrams
Over voltage - N.D. relay
Under voltage - N.D. relay
Under voltage - Latch function - N.D. relay
Over voltage - Inhibit function - N.D. relay
67.267.2
18.718.7
4545
35.535.5
8181
2
Dimensions
Wiring Diagrams
