Temperature Measuring with Pt100-Sensors
With its introduction into the Tiny Snap Series of the Temperature Transmitter DR 48, DRAGO has further expanded its product offerings in the area of compact and economical interface technology components.
- Cost optimized design
Economical temperature measuring for standard applications with Pt100 sensor with 2-wire or 3-wire connection - Only 60 mm installation depth, 11.2 mm wide
Can be installed in economical standard terminal boxes - Fixed ranges, easy to use
Ready to use without any settings or adjustments - True 3-port separation
Protection against erroneous measurements due to parasitic voltages or ground loops - High reliability and long-term stability
New APT technology for signal processing - Protective Separation acc. to EN 61140
Protects service personnel and downstream devices against impermissibly high voltage - Cross-connector for the auxiliary power supply
Fast and economical installation - Unlimited use with 24 V AC/DC power supply
Universally applicable for all measurement and industrial applications - 5 Years Warranty
The Temperature Transmitter Tiny Snap DR 48 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 transmitter output. Its high level of reliability, extremely compact form, and cost optimized design make the DR 48 the first choice in its class!
Numerous sensible details: For example, because of its extremely small installation depth of only 60 mm, the DR 48 can also be installed in economical standard terminal boxes such as those frequently used for decentralized measuring points. A cross-connector for the auxiliary power supply ensures fast and economical installation. The slim housing with 11.2 mm width saves significant space on the DIN-rail.
Analog signal processing utilizing the new APT technology guarantees precise measured values with short response times and outstanding signal reproduction at the output – and all this with unparallel sturdiness and long-term stability of the insulation paths under tough industrial conditions.
Protective Separation and the 24 V AC/DC power supply make the DR 48 universally applicable for all measurement and industrial applications, as well as for building automation.
Input
| Input signal | Pt 100, see Product line |
| Sensor connection | 2-wire / 3-wire |
| Measuring range 1) | Fixed ranges within -50 to +400 °C |
| Sensor wire resistance | < 10 Ohm / wire |
| Sensor current | 1 mA |
Output
| Output signal | 0...20 mA, 4...20 mA, 0...5 V, 0...10 V see Product line |
|
| Load | Current output Voltage output |
≤ 500 Ohm ≥ 2 kOhm |
| Ripple | < 10 mVrms | |
| Offset | ≤ 20 µA / 10 mV | |
General Data
| Linearity | < 0.2 % of input span | |
| Temperature coefficient 2) | < 0.025 %/K | |
| Calibration | ± 0.2 °C | |
| Response time | < 100 ms | |
| Test voltage | 2.5 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 EN61010-1 up to 300 V AC/DC for overvoltage category II and pollution degree 2 between all circuits. | |
| Ambient temperature | Operation Transport and storage |
0 °C to +55 °C –25 °C to +80 °C |
| Power supply | 24 V AC/DC, ± 15 % | AC: 48 ... 62 Hz, approx. 2 VA DC: approx. 0.7 W |
| EMC 4) | EN 61326 -1 | |
| Construction | 11.2 mm housing, protection class: IP 20 | |
| Weight | Approx. 50 g | |
- Other input ranges on request!
- Average TC in specified operating temperature range.
- As far as relevant the standards and rules mentioned above are considered by development and production of our devices. In addition relevant assembly rules are to be considered by installation of our devices 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.
Terminal assignments
Wire cross-section max. 2,5 mm²
| 1 | Pt-Sensor | 5 | Output + |
| 2 | Pt-Sensor | 6 | Output - |
| 3 | Sense | 7 | Power supply ~ |
| 8 | Power supply ~ |
| Devices | Order No. |
||||
| Temperature-Transmitter DR 48 K | Pt 100 | DR 48 K - | X | X | |
| Input | 0 | ||||
| 1 | |||||
| 2 | |||||
| 3 | |||||
| 4 | |||||
| 5 | |||||
| 6 | |||||
| 7 | |||||
| Output | 2 | ||||
| 4 | |||||
| 5 | |||||
| 6 | |||||
| Cross-connector (2 pcs.) for looping through the power supply for up to 10 Tiny Snap, splittable |
DZU 0801 |
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| Example: Temperature Transmitter for Pt 100, Input 0 ... 200 °C, Output 4 ... 20 mA |
DR 48 K - |
2 |
4 |
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