Specifications are subject to change without notice (01.12.04)
1
Monitoring Relays
Product Description
Ordering Key
Housing
Function
Type
Item number
Output
Power supply
• Motor temperature monitoring relay
• Measuring ranges: PTC according to EN 44081
• Remote and local alarm reset (DTA02, PTA02)
• Output: 8 A SPDT relay normally energized
• For mounting on DIN-rail in accordance with DIN/EN
50 022 (DTA01, DTA02) or plug-in module (PTA01,
PTA02)
• 22.5 mm Euronorm housing (DTA01, DTA02) or
36 mm plug-in module (PTA01, PTA02)
• LED indication for relay and power supply ON (DTA02,
PTA02)
• Galvanically separated power supply
Type Selection
Input (PTC)
DTA01, DTA02:
Terminals T1, T2
PTA01, PTA02:
Terminals 5, 6
Measuring ranges
Max cold PTC resistance
1500
Ω
Alarm setpoint
3100
Ω ± 10%
Return setpoint
1650
Ω ± 10%
Short-circuit detection
0 to 10
Ω
Measurement voltage
≤2.5V (acc. to IEC 60034-11)
Contact input
DTA02
Terminals Z1, Z2
PTA02
Terminals 8, 9
Disabled
> 10 k
Ω
Enabled
< 500
Ω
Alarm reset
> 500 ms
Motor temperature
Types DTA01, PTA01, DTA02, PTA02
Input Specifications
Output
SPST or SPDT relay
Rated insulation voltage
250 VAC
Contact ratings (AgSnO2)µ
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 106 operations
Electrical life
≥ 105 operations
(at 8 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
DTA 01 C 230
DTA01, DTA02, PTA01 and
PTA02 are precise thermistor
monitoring relays.
They can be used to monitor
the temperature of the coils of
a motor with built-in PTC’s.
The alarm status of the relay
can be reset by either an
external contact or an internal
button (DTA02, PTA02).
The test button allows the
simulation of the fault condi-
tion (DTA02, PTA02).
The red LED indicates the
alarm status.
DTA01, DTA02
PTA01, PTA02
Mounting
Output
Supply: 24 VDC
Supply: 24 VAC
Supply: 115 VAC
Supply: 230 VAC
DIN-rail
SPST
DTA 01 C 724
DTA 01 C 024
DTA 01 C 115
DTA 01 C 230
Plug-in
SPDT
PTA 01 C 724
PTA 01 C 024
PTA 01 C 115
PTA 01 C 230
DIN-rail
SPDT
DTA 02 C 724
DTA 02 C 024
DTA 02 C 115
DTA 02 C 230
Plug-in
SPDT
PTA 02 C 724
PTA 02 C 024
PTA 02 C 115
PTA 02 C 230
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