SITRANS P280 for flexible and cost-effective applications in pressure monitoring
The SITRANS P280 is a WirelessHART field device for measuring absolute and gauge pressure.
The measuring ranges for absolute and gauge pressure measurements are 0 to 2, 10, 50, 200 and 400 bar (0 to 29, 145, 725, 2900 and 5800 psi).
The sensor is integrated into the transmitter casing.
On the wireless communication side, the transmitter supports the WirelessHART standard. A HART modem can be connected to the transmitter particularly for initial parameterization.
It can be used in all industries and applications in non-explosive areas.
The SITRANS P280 is a pressure transmitter that features Wireless HART as the standard communication interface.
Also available is a wired interface to connect a HART modem:
SITRANS P280 WirelessHART Pressure Transmitter | |
Mode of operation | |
Measuring principle | piezo-resistive |
Measured variable | Gauge and absolute pressure |
Gauge pressure input | |
Measuring range | Overload limit/Bursting pressure |
0 ... 2 bar g (0 ... 29 psi) | 5 bar g (72.5 psi g) |
0 ... 10 bar g (0 ... 145 psi) | 50 bar g (363 psi g) |
0 ... 50 bar g (0 ... 725 psi) | 250 bar g (1740 psi g) |
0 ... 200 bar g (0 ... 2900 psi) | 650 bar g (7250 psi g) |
0 ... 400 bar g (0 ... 5800 psi) | 650 bar g (7250 psi g) |
Units | mbar, bar, mmH2O, inH2O, atm, Torr, gcm², kgcm², mPa, KPa, Pa, psi, mmHG, mmH2O, ftH2O, inHG, inH2O |
Absolute pressure input | |
Measuring range | Overload limit/Bursting pressure |
0 ... 2 bar a (0 ... 29 psi a) | 5 bar a (72.5 psi a) |
0 ... 10 bar a (0 ... 145 psi a) | 50 bar a (363 psi a) |
0 ... 50 bar a (0 ... 725 psi a) | 250 bar a (1740 psi a) |
0 ... 200 bar a (0 ... 2900 psi a) | 650 bar a (7250 psi a) |
0 ... 400 bar a (0 ... 5800 psi a) | 650 bar a (7250 psi a) |
Units | mbar, bar, mmH2O, inH2O, atm, Torr, gcm², kgcm², mPa, KPa, Pa, psi, mmHG, mmH2O, ftH2O, inHG, inH2O |
Output | |
Output signal | 2.4 GHz Wireless signal with TSMP (Time Synchronized Mesh Protocol) |
Measuring accuracy | According to IEC 60770-1 |
Error in measurement at limit setting incl. hysteresis and reproducibility | typically 0.17 % of span, max. 0.25 % of sensor span |
Long-term stability | max. ± 0.25 % of sensor/year span |
Influence of ambient temperature | max. ≤ typically 0.07 %/10K, max. 0.2 %/10K of span of sensor |
Rated conditions | |
Ambient conditions | |
| -40 ... +80 °C (-40 ... +176 °F) (in ambient temperatures below -20 °C (-4 °F) and above +70 °C (158 °F), readability of the display is limited.) |
| -40 ... +85 °C (-40 ... +185 °F) |
| < 95 % |
Climatic class | 4K4H in accordance with EN 60721-3-4(stationary use at locations not protected against weather) |
Degree of protection | IP65/NEMA 4 |
Permissible medium temperature | -40 ... 85 °C (-40 ... +185 °F) |
Design | |
Enclosure material | low-copper die-cast aluminum, GD-AISi12 |
Shock resistance | in accordance with EN 60068-2-29 / 03.95 |
Resistance to vibration | in accordance with EN 60068-2-6/ 12.07 20 ≤ f ≤ 2000 Hz 0.01 g²/Hz |
Weight | |
without battery | 1.5 kg (3.31 lb) |
With battery | 1.6 kg (3.53 lb) |
Dimensions (W x H x D) | See Dimensional drawing |
Process connection |
|
Sensor break | Is recognized |
Displays and controls | |
Display (with illumination) | |
| 104 x 80 pixels |
| adjustable |
| adjustable |
Setting options |
|
Auxiliary power supply | |
Battery | 3.6 V DC |
Communication | |
Radio | WirelessHART V7.1 conforming |
Transmission frequency band | 2.4 GHz (ISM-Band) |
Transmission range under reference conditions | Up to 250 m (line of sight) in outside areas Up to 50 m (greatly dependent on obstacles) in inside areas |
Communication interfaces |
|
Certificates and approvals | |
Wireless communication approvals | R&TTE FCC |
Classification according to pressure equipment directive (PED 97/23/EC) | Gases: Fluid group 1 Liquids: Fluid group 1; meets requirements as per Section 3, Subsection 3 (good engineering practice) |
The SITRANS P280 has a robust aluminum enclosure and is suitable for outside use. It conforms with the IP65 safety class.
The operating temperature range is -40 to +80 °C (-40 to +176 °F). Power supply is provided through an integrated battery, which is available as an accessory. The device is only approved for operation with this battery.
The aerial features a rotatable joint which can be used for directional alignment. Wireless signals can thus be optimally received and transmitted.
A special highlight is the option for direct operation on the device. The operating strategy used in this case seamlessly integrates into the strategy of all new Siemens field devices.
Using the device's control buttons, it is easy to turn the HART modem interface of the device on and off. The device can be put to passive status and reactivated at any time. This helps to extend the service life of the battery.
The SITRANS P280 transmitter features a ceramic measuring cell for gauge and absolute pressure measurements.
The SITRANS P280 can integrate itself into a WirelessHART network. It can be parameterized and operated through this network. Measured process values are transported via the network to the SIEMENS IE/WSN-PA link.
Field device data received by the IE/WSN-PA LINK is transmitted to the connected systems, for example the process control system SIMATIC PCS 7. For an introduction to the mode of operation of WirelessHART, please see the FI 01 catalogue, section 9 or http://www.siemens.de/wirelesshart.
Detailed information on IE/WSN-PA can be found in the FI 01 catalogue, section 9 or http://www.siemens.de/wirelesshart.
The integration of field devices in SIMATIC PCS 7 and other process control systems can now be done seamlessly and cost-effectively with wireless technology, especially in situations where high wiring costs may be expected. Of particular interest are measuring points which are to be added and for which no MSR wiring is available.
Siemens WirelessHART devices are designed for optimum compatibility with products in the SCALANC W range.
Where larger distances between the IW/WSN-PA LINK and control systems need to be overcome, this connection can also be implemented on a wireless and cost-effective basis using the products of the SCALANCE W family.
Integration of a meshed network in SIMATIC PCS7
Configuration of the SITRANS P280 may be carried out as follows:
SITRANS P280 WirelessHART pressure transmitter, process connection G½", dimensions in mm (inch)
SITRANS P280 WirelessHART pressure transmitter, process connection ½ - 14 NPT, dimensions in mm (inch)
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