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
2
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
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 flows
• Loop current does not
HARTKommunikation
7
8
5
6
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
3
WirelessHART Adapter SWA70
12
14
16
18
20
22
24
Field device power supply [V]
Loop current [mA]
04812
16
20
1
2
3
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
4
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