Siemens SIMATIC 6DL1 136-6AA00-0PH1 - HART System Setup and Configuration

8.2 HART system connection
8.2.1 Notes on system connection
The following describes the system connection and con󹪝guration of the 󹪝eld devices.
System environment
To use an intelligent 󹪝eld device with HART functionality, you require the following system
environment:
• 4 to 20 mA current loop
• Connecting 󹪝eld devices to the I/O module
The system connection is shown as follows:
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The I/O module is used in an IO device based on ET 200SP HA. You can connect a HART 󹪝eld
device to each channel (monodrop operation). The I/O module operates as a HART master and
the 󹪝eld devices as HART slaves.
The I/O module receives the commands, e.g. from the HART con󹪝guration tool, forwards them
to the intelligent 󹪝eld device and returns the responses. The interface of the I/O module is made
up of data records that are transferred internally between the IM and I/O module via the
ET 200SP HA IO device. The data records must be created and interpreted by the client.
• HART signal (Page 81)
• HART con󹪝guration tool (Page 80)
• HART device status (Page 81)
HART function
8.2 HART system connection
F-AI 8xI 2-/4-wire HART HA
Equipment Manual, 09/2021, A5E50557845-AA 79