Specifications

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Siemens FI 01 · 2015 US Edition

Temperature Measurement

Transmitters for field mounting

SITRANS TF280 WirelessHART

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Overview

SITRANS TF280 for flexible and cost-effective temperature mea-

surements

• Supports the WirelessHART standard (HART V 7.1)

• Very high security level for wireless data transmission

• Built-in local user interface (LUI) with 3-button operation

• Optimum representation and readability using graphical dis-

play (104 x 80 pixels) with integrated backlight

• Stand-by (deep sleep phase) mode can be turned on and off

with push of a button

• Battery power supply

• Battery life time up to 5 years

• Extend battery life time with HART modem interface which can

be switch off

• Optimized power consumption through new design, and in-

crease in battery life time

• Simple configuration thanks to SIMATIC PDM

• Housing meets IP65 degree of protection

• Supports all Pt100 sensors as per IEC 751/DIN EN 60751

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Benefits

The SITRANS TF280 is a temperature transmitter that features

WirelessHART as the standard communication interface.

Also available is a wired interface to connect a HART modem:

• Flexible temperature measurement

• Save costs on wiring at difficult installation conditions. Wire-

less technology offers cost advantages in cases where exten-

sive wiring costs would normally apply.

• It enables additional hitherto unfeasible measuring points,

particularly for monitoring purposes

• Easy installation also on moveable equipment parts

• Enables cost-effective temporary measurements, for example

for process optimizations.

• Optimum solution in addition to wired communication and for

system solutions in process automation

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Application

The SITRANS TF280 is a WirelessHART field device for temper-

ature measurement with a Pt100 sensor.

This sensor can be installed directly on the field device, or con-

nected at an offset with a cable connection. On the wireless

communication side, the transmitter supports the WirelessHART

standard. A HART modem can be connected to the transmitter

particularly for initial parameterization. Alternatively the device

can be commissioned comfortably by means of the local push-

buttons w/o any additional handset devices.

It can be used in all industries and applications in non-explosive

areas.

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Design

The SITRANS TF280 has a robust aluminum enclosure and is

suitable for outside use. It conforms with the IP65 safety class.

The operation 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 antenna 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 possibility to operate directly on the

device with 3 push buttons. It perfectly matches the strategy of

all new Siemens field devices.

Using the device’s push 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 life time of the battery.

The SITRANS TF280 transmitter features a cable gland or a

Pt100 sensor including protective piping.

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Function

The SITRANS TF280 can join to a WirelessHART network. It can

be parameterized and operated through this network. Measured

process values are transmitted 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 sys-

tem SIMATIC PCS 7. For an introduction of WirelessHART,

please see the FI 01 catalogue Sec. 8 or

www.siemens.com/wirelesshart.

Detailed information on IE/WSN-PA LINK can be found in the

FI 01 catalogue Sec. 7 or www.siemens.com/wirelesshart.

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Integration

Connecting to SIMATIC PCS 7

The integration of field devices in SIMATIC PCS 7 and other pro-

cess control systems can be now done seamlessly and cost-ef-

fectively 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 wiring

is available.

Where larger distances between the IE/WSN-PA LINK and con-

trol systems need to be overcome, this connection can also be

implemented on a wireless and cost-effective basis using the

SCALANCE W series of products. Siemens WirelessHART de-

vices operate with optimum coexistence to SCALANCE W family

products.