Siemens SIMATIC ET 200SP HA - HART System Connection; Useful Information about System Connection

HART responses always contain data. Status information (HART device status; 1st and 2nd status
bytes) is always sent together with a HART response. status bytes) is always sent together with
a HART response. You should evaluate these to make sure the response is correct.
7.2 HART system connection
7.2.1 Useful information about 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:
P$
$'&
6,0$7,&
3'0
+$57KDQGKHOG
6HQGLQJUHFHLYL
QJWKH+$57
VLJQDO
/9
$QDORJGLJLWDO
FRQYHUVLRQRIWKH
F\FOLFPHDVXUHG
YDOXH
,QWHUIDFHWR
352),1(7
0RGHP
+$57DQDORJPRGXOH)LHOGGHYLFHZLWK+$57
IXQFWLRQDOLW\
+$57SDUDPHWHU
DVVLJQPHQWWRRO
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
HART function
7.2 HART system connection
AI 4xI 2-/4-wire HART ISOL HA
Equipment Manual, 07/2022, A5E50101523-AB 39