Temperature Measuring with Pt100/Pt1000-Sensors
With the configurable Temperature Transmitter DR 4700 DRAGO is extending its offer on high functional and high reliable components of the interface technique.
- Extensive range selection
Measurement range within -100 to +600 °C for Pt100 and Pt1000 sensors - Easy selection of configuration
Measurement range, type of sensor, sensor connection and output signal can be easily set by using DIP switch - Universal power supply for 20...253 V AC/DC
Applicable world-wide for all common supply voltages - 3-port isolation
Protection against erroneous measurements due to parasitic voltages or ground loops - Ultra small sized housing
12.5 mm housing with plug-in screw terminal blocks - Protective Separation
Protects service personnel and downstream devices against impermissibly high voltage - Maximum reliability
No maintenance costs - 5 Years Warranty
The Temperature Transmitter DR 4700 converts the sensor signal on input to temperature linear standard signal (0...20 mA, 4...20 mA or 0...10 V) and makes this signal galvanic isolated available at the output. Due to the easy selection of the input and output ranges, the new universal power supply and the ultra small housing the Temperature Transmitter is suitable for flexible use. High reliability and Protective Separation are further characteristics that make the DR 4700 unrivaled.
The configuration of measurement range can be easily set within -100 to +600 °C by using DIP switch. Subsequent readjustment after range selection or a measured range compensation can then be performed at the zero/span potentiometers on the front panel. Alternatively, the Temperature Transmitter is also available customer-specific adjusted.
The small housing with 12.5 mm width saves space in your switch cabinet and facilitates by the practical plug-in screw terminal blocks the assembly. For range setting a simple housing unblocking is installed which makes it possible to reach easily all control elements on the mounting rail.
The new universal power pack for 20...253 V AC/DC means the DR 4700 can be used anywhere in the world, with all mains power supplies. The unit’s high efficiency contributes significantly to reducing the unit’s own heat generation. This is reflected in extremely high reliability and long-term stability. A green LED on the front of the unit has been provided to monitor the power supply.
Input
| Input signal | Pt 100 / Pt 1000, switchable |
| Sensor connection | 2-wire-, 3-wire-, 4-wire 1) |
| Measuring range 1) | |
| Zero | –100 °C,– 50 °C, 0 °C, 50 °C, switchable with Potentiometer ZERO 0 ... 50 °C adjustable |
| Span | 50 K, 100 K, 200 K, 300 K, switchable with Potentiometer SPAN 100 ... 200 % of span adjustable |
| Sensor wire resistance | < 10 Ohm per wire |
| Sensor current | 1mA / 0.1 mA |
| Sensor diagnostic | Sensor / wire break IOUT > 22 mA |
Output
| Output signal | 0 ... 20 mA, 4 ... 20mA, 0 ... 5 V, 1 ... 5 V 0 ... 10 V, 2 ... 10 V switchable |
|
| Load | Current output Voltage output |
≤ 12 V (600 Ohm at 20 mA) ≤ 5 mA (2 kOhm at 10 V) |
| Ripple | < 10 mV eff | |
| Sensor break action | Current output Voltage output |
≥ 22 mA ≥ 11 V |
General Data
| Linearity | < 0.2 % of span |
|
| Temperature coefficient 2) | < 0.01 °C/K amb. + 0,02 %/K of final value | |
| Calibration | Max. of ± 0.1 °C or 0.1 % of measuring span | |
| Response time | < 50 ms | |
| Test voltage | 4 kV, 50 Hz input against output against power supply |
|
| Working voltage 3) (Basic Insulation) |
Up to 600 V AC/DC for overvoltage category II and pollution degree 2 acc. to EN 61010-1 between all circuits. | |
| Protection against electrical shock 3) | Protective separation according to EN 61140 by reinforced insulation in accordance with EN 61010-1 up to 300 V AC/DC for overvoltage category II and pollution degree 2 between all circuits. | |
| Ambient temperature | Operation Transport and storage |
–10 to +60 °C (+14 to +140 °F) –35 to +85 °C (–4 to +176 °F) |
| Power supply | 20...253 V AC/DC, |
AC 48...62 Hz, approx. 3 VA DC approx. 1.5 W |
| EMC 4) | EN 61326-1 | |
| Construction | 12.5 mm housing, protection type: IP 20 | |
| Weight | Approx. 100 g | |
- Factory setting
- Average TC in specified operating temperature range
- As far as practicable the standards and rules mentioned above are considered by development and production of our devices. In addition the assembly rules for our devices are to be considered by installation in other equipments. For applications with high working voltages, take measures to prevent accidental contact and make sure that there is sufficient distance or insulation between adjacent situated devices.
- Minor deviations possible during interference
Bold: Factory setting
Terminal assignments
Wire cross-section max. 2.5 mm², Multi-wire connection max. 1 mm² (two wires with same cross-section)
| 1 | Input Pt(+) | 5 | Output + |
| 2 | Input Pt(-) | 6 | Output - |
| 3 | 3-wire (+) | 7 | Power supply ~ |
| 4 | 4-wire (-) | 8 | Power supply ~ |
| Devices | Order No. |
| Temperature transmitter, configurable (0 ... 100°C preadjusted) |
DR 4700 AG |