Specifications are subject to change without notice (18.09.06)
1
Monitoring Relays
Product Description
Ordering Key
Housing
Function
Type
Item number
Output
Power supply
Range
AC/DC over current monitoring relay
Current measured through internal shunt
Measuring range 0.5 to 5 A AC/DC
Adjustable current limit on relative scale
Adjustable hysteresis
Programmable latching at set level
Output: 8 A SPDT relay normally de-energized
For mounting on DIN-rail in accordance with DIN/EN
50 022 (DIA01) or plug-in module (PIA01)
22.5 mm Euronorm housing (DIA01) or 36 mm plug-in
module (PIA01)
LED indication for relay and power supply ON
Galvanically separated power supply
Type Selection
Mounting
Output
Supply: 24 VDC
Supply: 48 VDC
Supply: 24/48 VAC
Supply: 115/230 VAC
DIN-rail
SPDT
DIA 01 C 724 5A
DIA 01 C 748 5A
DIA 01 C B48 5A
DIA 01 C B23 5A
Plug-in
SPDT
PIA 01 C 724 5A
PIA 01 C 748 5A
PIA 01 C B48 5A
PIA 01 C B23 5A
Input (current level)
DIA01
Terminals Y1, Y2
PIA01
Terminals 5, 7
Measuring ranges
Direct
Internal resist.
Max. curr.
..5A:
0.5 to 5 A AC/DC
0.05
6 A
Max. current for 1 s
25 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
DIA01
Terminals Z1, Y1
PIA01
Terminals 8, 9
Disabled
> 10 k
Enabled
< 500
Latch disable
> 500 ms
Note:
The input voltage cannot
raise over 300 VAC/DC with
respect to ground (PIA only)
1-Phase AC/DC Over Current
Types DIA01, PIA01
Input Specifications
Output
SPDT relay
Rated insulation voltage
250 VAC
Contact ratings (AgSnO
2
)
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 10
6
operations
Electrical life
10
5
operations
(at 8 A, 250 V, cos
= 1)
Operating frequency
7200 operations/h
Dielectric strength
Dielectric voltage
2 kVAC (rms)
Rated impulse withstand volt. 4 kV (1.2/50 s)
Output Specifications
DIA 01 C B23 5A
DIA01 and PIA01 are precise
AC/DC over current monitor-
ing relays. Direct measuring
or through current transformer.
Owing to the built-in latch
function, the ON-position of
the relay output can be
maintained.
The red LED indicates the
relay status. Through the
built-in shunt it is possible to
monitor loads up to 5 A
AC/DC.
DIA01
PIA01
2
Specifications are subject to change without notice (18.09.06)
Range Setting
Centre knob:
Setting of current on relative
scale: from 10 to 110% of the
full-scale value.
Hysteresis:
Approx. 4% of set value, it
can be extended by inserting
a resistor between terminals
Z1, Y1 or 8, 9.
Approx. resistor values:
10%:
180 k
25%:
47 k
50%:
22 k
75%:
15 k
Latch:
< 500
DIA01, PIA01
Mode of Operation
DIA01 and PIA01 monitor
both AC and DC over current
through an internal shunt.
They can monitor AC cur-
rents up to 6000 A when
connected to a suitable cur-
rent transformer.
Example 1
(connection between termi-
nals Z1, Y1 or 8, 9 - latch
function enabled)
The relay operates and latch-
es in operating position
when the measured value
exceeds the set level. Pro-
vided that the current has
dropped min. 4% below the
set point (see hysteresis) the
relay releases when the inter-
connection between termi-
nals Z1, Y1 or 8, 9 is inter-
rupted or the power supply
is interrupted as well.
Example 2 (Stardard CT)
(no connection between ter-
minals Z1, Y1 or 8, 9 - latch
function disabled)
The relay operates when the
current flowing through the
transformer exceeds the set
level. It releases when the
current drops min. 4% below
the set level (see hysteresis)
or when the power supply is
interrupted.
Power supply
Overvoltage cat. III
Rated operational voltage
(IEC 60664, IEC 60038)
through terminals:
A1, A2 or A3, A2 (DIA01)
2, 10 or 11, 10 (PIA01)
724:
24 VDC 20%, insulated
748:
48 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
4 VA
DC
2 W
Supply Specifications
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
< 300 ms
Accuracy
(15 min warm-up time)
Temperature drift
1000 ppm/C
Repeatability
0.5% on full-scale
Indication for
Power supply ON
LED, green
Output relay ON
LED, red
Environment
(EN 60529)
Degree of protection
IP 20
Pollution degree
3 (DIA01), 2 (PIA01)
Operating temperature
-20 to 60C, R.H. < 95%
Storage temperature
-30 to 80C, R.H. < 95%
Housing
Dimensions
DIA01
22.5 x 80 x 99.5 mm
PIA01
36 x 80 x 94 mm
Weight
Approx. 150 g
Screw terminals
Tightening torque
Max. 0.5 Nm
acc. to IEC 60947
Approvals
UL, CSA (except 748 models)
CE Marking
Yes
EMC
Electromagnetic Compatibillity
Immunity
According to EN 61000-6-2
Emission
According to EN 61000-6-3
General Specifications
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