1
Monitoring Relays
Product Description Ordering Key
Housing
Function
Type
Item number
Output
Power supply
Measuring range
• TRMS AC/DC over or under current
monitoring relay
• Current measuring through internal shunt
• Selection of measuring range by DIP-switches
• Measuring ranges from 0.1 mA to 5 A AC/DC
• Adjustable current 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
• Galvanically separated power supply
Input
Current level Terminals Y1, Y2
Measuring ranges
Internal resist. Max. curr.
..5MA: 0.1 to 1 mA AC/DC 100 Ω 40 mA
0.2 to 2 mA AC/DC 100 Ω 40 mA
0.5 to 5 mA AC/DC 100 Ω 40 mA
Max. current for 1 s 100 mA
..50MA: 1 to 10 mA AC/DC 10 Ω 120 mA
2 to 20 mA AC/DC 10 Ω 120 mA
5 to 50 mA AC/DC 10 Ω 120 mA
Max. current for 1 s 300 mA
..500MA:10 to 100 mA AC/DC 1 Ω 700 mA
20 to 200 mA AC/DC 1 Ω 700 mA
50 to 500 mA AC/DC 1 Ω 700 mA
Max. current for 1 s 1.4 A
1-Phase True RMS AC/DC Over or Under Current
Type DIB71
Input Specifications
DIB 71 C B23 5A
DIB71 is a precise TRMS
AC/DC over or under current
(selectable by DIP-switch)
monitoring relays. Direct measuring or through current
transformer.
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. Through the built-in
shunt it is possible to monitor loads up to 5 A AC/DC.
35.5 mm wide housing suitable both for back and front
panel mounting.
Measuring ranges (cont.)
Internal resist. Max. curr.
..5A: 0.1 to 1 A AC/DC 0.03 Ω 6 A
0.2 to 2 A AC/DC 0.03 Ω 6 A
0.5 to 5 A AC/DC 0.03 Ω 6 A
Max. current for 1 s 15 A
Standard CT (examples) AAC
rms
Max. curr.
TADK2 50 A/5 A 5 to 50 A 60 A
TAD2 150 A/5 A 15 to 150 A 180 A
TAD6 400 A/5 A 40 to 400 A 480 A
TAD12 1000 A/5 A 100 to 1000 A 1200 A
TACO200 6000 A/5 A 600 to 6000 A 7200 A
Contact input Terminals Z1, Y1
Disabled > 10 kΩ
Enabled < 500 Ω
Latch disable > 500 ms
Type Selection
Mounting Output Measuring range Supply: 24/48 VAC Supply: 115/230 VAC
DIN-rail SPDT 0.1 to 5 mA AC/DC DIB 71 C B48 5mA DIB 71 C B23 5mA
DIN-rail SPDT 1 to 50 mA AC/DC DIB 71 C B48 50mA DIB 71 C B23 50mA
DIN-rail SPDT 10 to 500 mA AC/DC DIB 71 C B48 500mA DIB 71 C B23 500mA
DIN-rail SPDT 0.1 to 5 A AC/DC DIB 71 C B48 5A DIB 71 C B23 5A
2
Mode of Operation
DIB71 monitors both AC and
DC over or under current
through an internal shunt.
Example 1
(connection between terminals Z1, Y1 - latching 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 current 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 the power supply is
interrupted as well.
The red LED flashes until the
delay time has expired or the
measured value comes back
to a non-alarm value (see
hysteresis setting).
Example 2 (Stardard CT)
(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 current
drops below (or exceeds) the
set level (see hysteresis setting) or when power supply
is interrupted.
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.
DIB71
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
Dielectric voltage
Supply to input 4 kV (1.2/50 µs)
Supply to output 4 kV (1.2/50 µs)
Input to output 4 kV (1.2/50 µs)
Rated operational power
AC 3 VA
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 LED, yellow
Environment (EN 60529)
Degree of protection IP 20
Pollution degree 3
Operating temperature
5A -20 to 50°C, R.H. < 95%
others -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
acc. to IEC 60947
Approvals UL, CSA
CE Marking Ye s
EMC
Electromagnetic Compatibillity
Immunity According to EN 61000-6-2
Emission According to EN 61000-6-3
General Specifications
Output SPDT relay
Rated insulation voltage 250 VAC
Contact ratings (AgSnO
2
)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 ≥ 10
5
operations
(at 5 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
3
Adjust the input range setting the DIP switches 1 and
2 as shown in figure.
Select the desired function
setting the DIP switches 3 to
6 as shown in figure.
To access the DIP switches
open the plastic cover as
shown in figure.
Selection of level and time
delay:
Upper knob:
Setting of hysteresis on relative scale: 0 to 30% on set
value.
Centre knob:
Current level setting on relative scale: 10 to 110% on
full scale.
Lower knob:
Setting of delay on alarm
time on absolute scale (0.1
to 30 s).
DIB71
Function/Range/Level and Time Delay Setting
Relay working mode
ON: Normally De-energized
OFF: Normally Energized
Measuring range
SW1 ON ON OFF
SW2 OFF ON ON
5MA 1 mA 2 mA 5 mA
50MA 10 mA 20 mA 50 mA
500MA 100 mA 200 mA 500 mA
5A 1 A 2 A 5 A
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 current
OFF: Under current
Wiring Diagrams
48/230 VAC 24/115 VAC
48/230 VAC 24/115 VAC
Latch/Inhibit
enable
Example 1 Example 2
PE
Y1
Y2
I
L
Z1
A1 A3
A2 15
N (-)
m
16 18
Y1
Y2
Z1
I
L
A1 A3
A2 15
N (-)
m
16 18
4
Power supply
Over current Under current - Latch function
Under current
Power supply
Latch ON
Set Level
Relay ON
Red LED ON
Set Level
Relay ON
Red LED ON
Power supply
Red LED ON
Set Level
Hysteresis
Hysteresis
Hysteresis
Relay ON
1 or 6 s
1 or 6 s
1 or 6 s
Over current - Inhibit function
Power supply
Inhibit ON
Set Level
Relay ON
Red LED ON
Hysteresis
1 or 6 s
Operation Diagrams
Over current - N.D. relay
Under current - N.D. relay
Under current - Latch function - N.D. relay
Over current - Inhibit function - N.D. relay
DIB71
67.2
18.7
45
35.5
81
2
Dimensions
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