Siemens SITRANS T Series - Programmable Sensor Input and Current Output Limits

Output
Analog accuracy
= 0.0016 mA


[ 
7RWDO
$FFXUDF\P$

7RWDO
$FFXUDF\P$

7RWDO
$FFXUDF\

7RWDO
$FFXUDF\

bP$
bP$
bP$
br&
br&br&[
&RQILJXUHGUDQJH
,1387
%DVLFYDOXH
$FFXUDF\
H[W&-&LQDFFXUDF\GXHWRVLJQDODPSOLILFDWLRQ[PHDVXUHGYDOXH
7RWDO
$FFXUDF\P$
[
[bP$bP$ bP$
[bP$RXWSXW
$QDORJDFFXUDF\
C.2 Programmable sensor input and current output limits
Description
Programmable input and output limits are available to increase system safety and integrity.
Input
When the input signal exceeds either of the programmable lower and upper limits, the device
will output a user de󹪝ned fault current. Setting input limits ensures that any out of range
measurements can be uniquely identi󹪝ed and 󹪞agged via the transmitter output, resulting in
improved asset and material protection e.g. thermal runaway of a reaction process can be
mitigated.
Example:
Pt100 input ranged 100 °C to 400 °C
Input limits set to Upper = +650 °C, Lower = -150 °C
Fault current set to 3.5 mA
Output limits set to Upper = 20.5 mA, Lower = 3.8 mA
Calibration examples
C.2 Programmable sensor input and current output limits
SITRANS TH100/TH320/TH420/TR320/TR420/TF320/TF420 with 4 to 20 mA/HART
226 Operating Instructions, 05/2020, A5E41864807-AB