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2914
2-wire room temperature transmitter
- Room temperature measurement
- Complete with sensor and transmitter
- 4...20 mA output in 2-wire connection
- Easy mounting
- Measurement range 0...70°C
- Supply 8...35 VDC
Application
- Electronic temperature measurement in for instance control rooms, offices, heating plants, factories, living rooms, and similar dry rooms.
- Suitable as a transmitter for controllers, trip amplifiers, displays, or superior SCADA systems.
Technical characteristics
- A precision Pt100 sensor with a small mass is mounted on the transmitter input thereby achieving a fast response time.
- The 2-wire output signal of 4...20 mA is proportional and linear to the temperature value that influences the built-in sensor.
- A reversed output signal of 20...4 mA may be ordered.
- A number of different sensor error detection options may be ordered.
- Protected against polarity reversal.
- The bottom of the cabinet can be attached to a wall by two screws.
- Visible or hidden cable access.
Environmental Conditions
| Operating temperature | 0°C to +70°C |
| Calibration temperature | 20...28°C |
| Relative humidity | < 95% RH (non-cond.) |
| Protection degree | IP30 |
Mechanical specifications
| Dimensions (HxWxD) | 70 x 121 x 25 mm |
| Weight approx. | 95 g |
| Wire size |
1 x 1.5 mm |
Common specifications
Supply |
|
| Supply voltage | 8.0...35 VDC |
| Internal power dissipation | 25 mW…0.8 W |
Response time |
|
| Response time | 10 s (@ 0.5 m/s) |
| Voltage drop | 8.0 VDC |
| Warm-up time | 5 min. |
| Signal / noise ratio | Min. 60 dB |
| Accuracy | Better than 0.3°C |
| Signal dynamics, input | 17 bit |
| Signal dynamics, output | 16 bit |
| Effect of supply voltage change | < 0.005% of span / VDC |
| Temperature coefficient | < ±0.01% of span / °C |
| Linearity error | < 0.1% of span |
| EMC immunity influence | < ±0.5% |
Input specifications
Common input specifications |
|
| Max. offset | 50% of max.°C |
RTD input |
|
| Sensor current | > 0.2 mA, < 0.4 mA |
| Measurement range | 0...70°C |
| Min. measurement range | 25°C (span) |
Output specifications
Current output |
|
| Signal range | 4…20 mA |
| Min. signal range | 16 mA |
| Load (@ current output) | ≤ (Vsupply - 8) / 0.023 [Ω] |
| Load stability | ≤ 0.01% of span / 100 Ω |
| NAMUR NE43 Upscale/Downscale | 23 mA / 3.5 mA |
Common output specifications |
|
| Updating time | 135 ms |
| of span | = of the presently selected range |
Observed authority requirements
| EMC | 2014/30/EU |
| EAC | TR-CU 020/2011 |