Saia-Burgess Controls AG
Manual for PCD2.W745 and PCD3.W745
│
Document 26-796 E
NG06 │ 2018-10-12
2
Configuration
2-2
Operating modes
Measurement unit:
The measurement unit for temperature sensors can be configured per module:
°C:
Temperature output in 1/10 °C
°F:
Temperature output in 1/10 °F
K:
Temperature output in 1/10 K
For voltage and Ohm input ranges, this configuration takes no effect.
2.2
Operating modes
RTD and resistance measurement
The module supports direct connection of Resistive Temperature Detectors (RTDs).
For this purpose, a precision current source supplies the sensors with a measure-
ment current of 250 μA.
2 – Wire connection
The wiring resistance can not be compensated.
PCD x.W745
R
th
X
+
S
en
sX
+
S
en
sX
-
G
N
D
3 – Wire connection
The voltage drop over one of the two supply lines is measured. Assuming that both
supply lines have the same resistance, the wiring error is calculated and compen
-
sated.
•
Use the same wire type for both supply lines
•
Be sure that the length / temperature distribution over both supply lines is iden-
tical
PCD x.W745
R
th
X
+
S
en
sX
+
S
en
sX
-
G
N
D
RTD
