Monitoring Relays Motor temperature Types DTA01, PTA01, DTA02, PTA02 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 DTA01, DTA02 PTA01, PTA02 Product Description Ordering Key DTA 01 C 230 DTA01, DTA02, PTA01 and either an external contact or Housing PTA02 are precise thermis- an internal button (DTA02, Function tor monitoring relays. PTA02). Type They can be used to monitor The test button allows the Item number the temperature of the coils simulation of the fault condi- Output of a motor with built-in tion (DTA02, PTA02). Power supply PTCs. The alarm status of The red LED indicates the the relay can be reset by alarm status. Type Selection Mounting Output Supply: 24 to 48 VAC/DC Supply: 115 VAC Supply: 230 VAC DIN-rail SPST DTA 01 CD 48 DTA 01 C 115 DTA 01 C 230 Plug-in SPDT PTA 01 CD 48 PTA 01 C 115 PTA 01 C 230 DIN-rail SPDT DTA 02 CD 48 DTA 02 C 115 DTA 02 C 230 Plug-in SPDT PTA 02 CD 48 PTA 02 C 115 PTA 02 C 230 Input Specifications Output Specifications Input (PTC) DTA01, DTA02: Terminals T1, T2 Output SPST or SPDT relay PTA01, PTA02: Terminals 5, 6 Rated insulation voltage 250 VAC Measuring ranges Contact ratings (AgSnO) 2 Max cold PTC resistance 1500 Resistive loads AC 1 8 A 250 VAC Alarm setpoint 3100 10% DC 12 5 A 24 VDC Return setpoint 1650 10% Small inductive loads AC 15 2.5 A 250 VAC Short-circuit detection 0 to 10 DC 13 2.5 A 24 VDC Measurement voltage 2.5V (acc. to IEC 60034-11) 6 Mechanical life 30 x 10 operations Contact input 5 Electrical life 10 operations DTA02 Terminals Z1, Z2 (at 8 A, 250 V, cos = 1) PTA02 Terminals 8, 9 Operating frequency 7200 operations/h Disabled > 10 k Dielectric strength Enabled < 500 Dielectric voltage 2 kVAC (rms) Alarm reset > 500 ms Rated impulse withstand volt. 4 kV (1.2/50 s) Specifications are subject to change without notice (31.03.08) 1DTA01, DTA02, PTA01, PTA02 Supply Specifications General Specifications Power supply Overvoltage cat. III Reaction time Rated operational voltage (IEC 60664, IEC 60038) Alarm ON delay < 150 ms through terminals: (resistance rising from A1, A2 (DTA01, DTA02) -20% to +20% set value) 2, 10 (PTA01, PTA02) Reset delay < 500 ms D48: 24 to 48 VAC/DC 15% (resistance decreasing from 45 to 65 Hz, insulated +20% to -20% set value) 115: 115 VAC 15% Accuracy (15 min warm-up time) 45 to 65 Hz, insulated Temperature drift 1000 ppm/C 230: 230 VAC 15% Repeatability 0.5% on full-scale 45 to 65 Hz, insulated Indication for Dielectric voltage (1.2/50 s) DC supply AC supply Power supply ON LED, green Supply to input 2 kV 4 kV Relay ON LED, yellow Supply to output 4 kV 4 kV Environment (EN 60529) Input to output 4 kV 4 kV Degree of protection IP 20 Rated operational power Pollution degree 3 (DTA01, DTA02), AC 2.5VA 2 (PTA01, PTA02) DC 1.5W Operating temperature -20 to 60C, R.H. < 95% Storage temperature -30 to 80C, R.H. < 95% Housing Mode of Operation Dimensions DTA01, DTA02 22.5 x 80 x 99.5 mm PTA01, PTA02 36 x 80 x 94 mm DTA01, DTA02, PTA01 and Example 2 - DTA02 or Weight Approx. 150g PTA02 monitor the resis- PTA02 tance value of the PTC The relay operates and the Screw terminals resistors connected to the yellow LED is ON as long as Tightening torque Max. 0.5 Nm terminals T1 and T2 (or 5 the measured resistance is acc. to IEC 60947 and 6). This value is related below the rated value. The Approvals UL, CSA with their temperature (often relay releases and the yellow CE Marking Yes the three coils of a motor) so LED is OFF if the measured to offer a prompt reaction to resistance (i.e. the tempera- EMC Electromagnetic Compatibillity over temperature. ture of the motor coils) Immunity According to EN 61000-6-2 exceeds the rated value. Emission According to EN 61000-6-3 Example 1 - DTA01 or Provided that the resistance PTA01 has dropped below the rat- The relay operates as long ed value (i.e. the tempera- as the measured resistance ture of the motor coils has is below the rated value. The returned cold), the relay relay releases if the mea- operates when the intercon- sured resistance (i.e. the nection between terminals temperature of the motor Z1, Z2 or 8, 9 is interrupted coils) exceeds the rated val- or the reset button on the ue. front of the unit is pressed. Operation Diagrams DTA01, PTA01 DTA02, PTA02 Power supply Power supply Reset contact Relay ON Relay ON 2 Specifications are subject to change without notice (31.03.08)