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Siemens IK PI · 2015

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Application (continued)

Industrial Wireless Communication

WirelessHART

IE/WSN-PA LINK

Retrofitting for diagnostics and maintenance

For this application, wireless adapters are looped into the

4-20 mA interface or screwed directly onto the HART device.

The acyclic HART message frames are transmitted by radio

between IE/WSN-PA LINK and a wireless adapter. Without

affecting the operation of the plant, the wireless adapter

modulates the acyclic HART message frames to the 4-20 mA

interface or extracts them from the 4-20 mA interface.

The IE/WSN-PA LINK collects the data of all wireless adapters

and transfers it via Industrial Ethernet to the diagnostics and

maintenance station.

If greater distances between the IE/WSN-PA LINK and the

monitoring station are to be spanned without cabling, this can be

implemented by means of Industrial Wireless LAN with the

access points and client modules of the SCALANCE W family.

Retrofitting of plants for diagnostics and maintenance

Controller without

HART support

Remote I/O station

w/o HART support

SITRANS

MDS

IE/WSN-

PA LINK

SITRANS

AW200

Industrial

Ethernet

Industrial Ethernet

PROFIBUS

Wireless

HART

IEEE 802.11

4–20 mA

G_IK10_XX_30348

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Design

• 2 x 10/100/1 000 Mbit/s RJ45 ports, electrical (no integral

switch; interfaces can be used, for example, for continuous

connection to the plant network as well as the temporary

connection of a PC)

• 1 x screw terminal for connection to Modbus RTU via RS485

• 1 x screw terminal for the 24 V DC connection

• Rugged metal enclosure with IP65 protection for use

outdoors, also in hazardous zone 2

• Mounting: wall or mast mounting (vertical);

U-bolts for mast mounting are included in the scope of

delivery.

Product versions

• With integral, non-detachable antenna

• Redundancy function and with N connector for connection of

an external antenna

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Function

WirelessHART

The IE/WSN-PA LINK establishes on the radio side an inter-

meshed wireless sensor network for communication with wire-

less field devices (e.g. transmitters). The data from the wireless

field devices is received by the IE/WSN-PA LINK and transmitted

via Industrial Ethernet to the connected systems. The supported

wireless network is an open wireless network specified by the

HART Communication Foundation (HCF) in accordance with the

WirelessHART (HART V7.1) standard.

On the field device side, the IE/WSN-PA LINK requires field

devices that support WirelessHART (HART). Existing field de-

vices can be integrated by means of wireless adapters into the

WirelessHART communication. To this end, the adapters are

looped into the 4-20 mA interface. In addition, as many as four

standard HART field devices with external power supply can be

connected to the adapter in multidrop mode. Individually con-

nected devices can be operated with the battery of the adapter.

The adapter wirelessly transmits all data and process values of

the connected devices. The advantage of this solution is that

tried and tested devices can continue to be used.

Industrial Ethernet

Via the Ethernet interface the IE/WSN-PA LINK supports the use

of the HART OPC server and the Modbus TCP protocol.

Configuration

The configuration is web-based, without additional software, and

performed from the PC. By means of the web user interface it is

also possible to display the device states and measured values

of the WirelessHART devices.

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