Connecting Resistance Thermometers In The Standard Pt 100 Range - Siemens S5-155U System Manual

The 460 Analog Input Module
9.3.10
Connecting Resistance
Thermometers in the
Standard Pt 100 Range
+
Pt 100
-
Pt 100
Pt 100
U
CM
U
Pt 100
Figure 9-9

Connecting Resistance Thermometers in the Standard Pt 100 Range

1)
If no Pt 100 is connected to CH4 to CH7, other voltages and currents can be measured at these channels with cards
6ES5 498-1AA21, 6ES5 498-1AA31, 6ES5 498-1AA41, 6ES5 498-1AA51, 6ES5 498-1AA61, 6ES5 498-1AA71.
2)
When cards 6ES5 498-1AA41, 6ES5 498-1AA51 or 6ES5 498-1AA71 are used, a short-circuit jumper is not required.
9 - 22
The series-connected resistance thermometers (up to 8 Pt 100s) are fed
with a current of 2.5 mA (I
voltage at the Pt 100's is picked off at measurement inputs M+ and M-.
In this mode, the whole temperature range of the Pt 100 (-200 °C to
+840 °C) is available. The mode is printed on the cover of the module
as follows:
"resistance thermometer uncompensated full range".
Other voltage sensors can be connected in a floating circuit at the
M+/M- inputs of a card which are not assigned to resistance
thermometers (voltage range 500 mV).
Card 1
M +
CH0
M -
Range
CH1
Card for
4 Inputs
6ES5 498-
-1AA11
CH2
CH3
0 ... 500 mV
Card 2
CH4
0 ... 500 mV
Range
2)
CM Card for
4 Inputs
6ES5 498-
-1AA11
1)
CH7
I C -
I C +
/I ) by a constant current generator. The
C+ C-
460 Analog Input Module
A
MUX
L +
L -
I const.
2.5 mA
C79000-B8576-C109-03
#
D
0 V Bus
System Manual