2
Specifications are subject to change without notice (01.12.04)
DTA01, DTA02, PTA01, PTA02
Mode of Operation
DTA01, DTA02, PTA01 and
PTA02 monitor the resis-
tance
value
of
the
PTC
resistors connected to the
terminals T1 and T2 (or 5
and 6). This value is related
with their temperature (often
the three coils of a motor) so
to offer a prompt reaction to
over temperature.
Example 1 - DTA01 or PTA01
The relay operates as long
as the measured resistance
is below the rated value. The
relay releases if the mea-
sured
resistance
(i.e.
the
temperature of the motor
coils) exceeds the rated val-
ue.
Example 2 - DTA02 or PTA02
The relay operates and the
yellow LED is ON as long as
the measured resistance is
below the rated value. The
relay releases and the yellow
LED is OFF if the measured
resistance (i.e. the tempera-
ture
of
the
motor
coils)
exceeds the rated value.
Provided that the resistance
has dropped below the rat-
ed value (i.e. the tempera-
ture of the motor coils has
returned
cold),
the
relay
operates when the intercon-
nection between terminals
Z1, Z2 or 8, 9 is interrupted
or the reset button on the
front of the unit is pressed.
Power supply
Overvoltage cat. III
Rated operational voltage
(IEC 60664, IEC 60038)
through terminals:
A1, A2
(DTA01, DTA02)
2, 10
(PTA01, PTA02)
724:
24 VDC ± 20%, insulated
024:
24 VAC ± 15%
45 to 65 Hz, insulated
115:
115 VAC ± 15%
45 to 65 Hz, insulated
230:
230 VAC ± 15%
45 to 65 Hz, insulated
Dielectric voltage
(1.2/50 µs)
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
2.5VA
DC
1.5W
Supply Specifications
Reaction time
Alarm ON delay
< 150 ms
(resistance rising from
-20% to +20% set value)
Reset delay
< 500 ms
(resistance decreasing from
+20% to -20% set value)
Accuracy
(15 min warm-up time)
Temperature drift
± 1000 ppm/°C
Repeatability
± 0.5% on full-scale
Indication for
Power supply ON
LED, green
Relay ON
LED, yellow
Environment
(EN 60529)
Degree of protection
IP 20
Pollution degree
3 (DTA01, DTA02),
2 (PTA01, PTA02)
Operating temperature
-20 to 60°C, R.H. < 95%
Storage temperature
-30 to 80°C, R.H. < 95%
Housing dimensions
DIN-rail version
22.5 x 80 x 99.5 mm
Plug-in version
36 x 80 x 87 mm
Weight
Approx. 150g
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 50081-1
General Specifications
N (-)
m
T1
T2
A1
A2
11
14
T
L
N (-)
m
5
7
10
1
3
L
T
2
4
Wiring Diagrams
DTA01
PTA01
µ
µ
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