Endress+Hauser WirelessHART Adapter SWA70 Specifications

TI00026S/04/EN/22.17 71396550

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Technical Information

WirelessHART Adapter SWA70

Smart WirelessHART interface module with power supply for field devices

Application

The WirelessHART Adapter SWA70 is an interface module for the wireless transmission of 4 to 20 mA/HART signals from connected field devices to a WirelessHART Fieldgate. It is powered by either a battery pack or power supply units. The WirelessHART Adapter can be used in hazardous and non-hazardous area for applications, such as:

• Process optimization: By connecting the WirelessHART Adapter, it is possible to monitor and optimize plant sections with less cost and effort.

• Level monitoring in tanks and silos: Measured values together with the device and battery status are transmitted at regular intervals to a higher-level system.

• Plant condition monitoring: Wireless devices are mounted at critical points in the plant which are not normally connected to the control room due to their limited accessibility or wiring costs. Improved data flow and diagnostics increase plant reliability and safety.

Your benefits

The flexible adapter concept offers the following advantages:

• HART devices are quickly upgraded to WirelessHART technology

• Fast integration of 4 to 20 mA field devices into a WirelessHART network

• One 4 to 20 mA field device and up to four HART field devices in multidrop mode can be connected to a WirelessHART Adapter

• Burst mode and event notification supported

• Remote and difficult-to-access HART devices are connected to the control room without expensive cabling

• Easy planning, quick installation and integration

WirelessHART Adapter SWA70

Function and system design

WirelessHART WirelessHART adds wireless capabilities to the HART protocol, while ensuring compatibility with

existing HART devices, commands and tools. A WirelessHART network comprises:

• Wireless field devices

• Wired field devices with a connected WirelessHART Adapter

• Gateways responsible for communication between devices and host applications

• Network and Safety Manager responsible for configuring, managing and monitoring the network

The WirelessHART protocol may not be used to replace the wiring in the case of safety applications with a control function.

WirelessHART Adapter SWA70

System design The WirelessHART Adapter SWA70 transmits information to a host application via a WirelessHART

The WirelessHART Adapter SWA70 acts as an add-on interface for wireless communication with HART field devices or 4 to 20 mA field devices. It is powered by either a battery pack, a wide range power unit or a DC power unit. The DC power unit can use solar power, for example. A special long-life, high-power battery is used as the battery.

The WirelessHART Adapter SWA70 supports the following functions:

• Power supply for a HART field device or a 4 to 20 mA field device

• Power supply of up to four HART devices in the multidrop mode with a wide range power unit

• Connection of up to four externally powered HART field devices in the multidrop mode

• Scaling of the current signal from a connected 4 to 20 mA field device

• Burst mode and event notification for the WirelessHART Adapter and the connected field devices

Fieldgate. The figure below shows a typical WirelessHART network architecture.

Ethernet

WirelessHART Adapter SWA70

Inputs (wired interface)

Inputs

One input channel for: • One point-to-point connection with a HART field device or

• One point-to-point connection with a 4-20 mA field device or

• Up to four HART field devices connected in multidrop mode if a wide range power unit is used. The wide range power unit provides 24 V to power the field devices.

Communication interface • HART interface to configure the WirelessHART Adapter with a HART modem

• LPI interface (internal interface for the manufacturing and diagnosis)

Protocol version HART Version 7.3 (backwards compatible with earlier HART versions)

Transmission rate 1200 bits/s

Field device power supply

Current: 4 to 20 mA (according to NAMUR recommendation NE 43) or 4 mA if

only one field device is connected in multidrop mode

≤ 3.6 mA or I ≥ 21 mA

Error current:

I Protection: Short-circuit protection, triggered if currents > 25 mA Terminal voltage: 8 to 23 V DC, configurable

Connection of externally powered devices on

max. permissible input current terminals 2...6: 100 mA max. permissible input voltage terminals 2...6: 30 V DC

terminals 2...6

Only the connection of power supply units of the protection class II is permissible.

Terminals The WirelessHART Adapter has a terminal block with screw terminals 1-6 and 2 eyelets 7 and 8 for

connection purposes.

Schleifenstrom-

Application Terminal

assignment

Power supply to a looppowered field device

Integration of the WirelessHART Adapter into a current loop

1 (+) and 2 (–) • Current measurement

2 (+) and 3 (–) • Current measurement

5 and 6 • Integration into HART

messung und HARTKommunikation

123 4

Remarks Connection values

• Loop current flows

• Loop current does not

HARTKommunikation

and HART communication where applicable

through the adapter

and HART communication where applicable

through the adapter

communication

flow through the adapter

Schleifenstrommessung 1 – 2

Schleifenstrommessung 2 – 3

• 4 to 20 mA (according to NAMUR NE43)

• 8-23 V power supply for field device, configurable, see the following diagram

•Integrated load: 250Ohm

• 4 to 20 mA (according to NAMUR NE43)

•Integrated load: 250Ohm

• Input impedance for HART communication: > 10 kOhm at 1700 Hz

• DC input impedance: 1 MOhm

WirelessHART Adapter SWA70

Field device power supply [V]

Loop current [mA]

04812

Field device power supply through SWA70

Application Terminal

assignment

Configuration of the WirelessHART Adapter with a HART modem

7 and 8 Temporary connection of

Remarks Connection values

• Input impedance for

the modem via eyelets

HART communication: > 10 kOhm at 1700 Hz

• DC input impedance: > 1 MOhm

1 SWA70 non-Ex versions with 4 to 20 mA field device 2 SWA70 non-Ex versions with HART field device 3 SWA70 Ex versions with HART field device or 4 to 20 mA field device

Output (wireless interface)

Communication interface WirelessHART communication interface (IEC 62591),

HART version 7.3 (backwards compatible with earlier HART versions)

Transmission rate Nominal 250 kBits/s

Operating frequency 2.4 GHz (ISM band)

Range Up to 250 m outdoors, up to 50 m indoors

Transmission power Can be configured for 0 dBm or 10 dBm to adapt to national regulations

Device variables Up to 10 bursts can be configured in accordance with the HART specification. Up to eight device

variables per burst can be configured depending on user transmission requirements.

Additional functions • Event notification, configurable for up to eight variables from the WirelessHART adapter and/or

Example:

• HART field device: device variables

• 4 to 20 mA field device: scaled or linearized process values

• WirelessHART Adapter: scaled loop current and other variables, choose from: estimated battery life, battery voltage, energy used, adapter temperature

connected field devices

• Error notification and scaling or linearization of the 4 to 20 mA signal of the connected analog field

device

• Monitoring of energy consumption

• Locking of device parameterization

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