Procedure
1. Connect the input or inputs to terminals 3 to 9.
,
,
,
&-&
,
,
,
Input 1 (I1) and/or
input 2 (I2):
2-wire, 3-wire or 4-wire RTD or
linear resistance
Input 1 (I1) and/or
input 2 (I2):
TC (int. CJC or
ext. 2-wire, 3-wire or 4-wire CJC)
Input 1 (I1) and/or
input 2 (I2):
voltage input
(unipolar and bipolar)
,
&-&
,
,
,
,
,
Input 1: TC (int. CJC or
ext. 2-wire or 3-wire CJC)
Input 2: 2-wire, 3-wire or 4-wire
RTD
Input 1 (I1) and/or
input 2 (I2):
3-wire or 4-wire potentiometer
Input 1 (I1): 5-wire potentiome‐
ter
Input 2 (I2): 3-wire potentiome‐
ter
2. Connect the supply voltage to the terminals 1 (+) and 2 (-).
Take the polarity into account. The device has reverse polarity protection.
7(6
7
E
XT
TEST
5
+$57
For devices with HART communication, connect a ≥ 250 Ω resistor.
Connecting
6.4 Connecting TH420
SITRANS TH100/TH320/TH420/TR320/TR420/TF320/TF420 with 4 to 20 mA/HART
82
Operating Instructions, 05/2020, A5E41864807-AB