48
Connection
| Installation and commissioning manual | 1SFC132081M0201
2-wire measurement for PTC
When you use 2-wire temperature sensors, the sensor
resistance and the wire resistance are added. Correct
for the resulting systematic errors when you change the
tripping device. Use
Table 1 Temperature errors in C°/K
to determine the temperature errors caused by the line
length. See
Figure 5.24.
Tightening torques and cable dimensions.
0,2 .. 2,5 mm
2
2x0,2 .. 1,5 mm
2
0,2 .. 2,5 mm
2
2x0,2 .. 1,5 mm
2
AWG 12 ... 24
0,5 Nm
4,3 lb.in
3,5 x 0,6 mm
(0.138 x 0.024 in)
M3
23 24 25 26 27
T1 T2 T3
28 29 30
+(B) -(A)
+24V + GND
Analog out
Temp In
Com 3
1
SFC132081M0201
Error caused by the line
The error caused by the line resistance is to
approximately 2.5 Kelvin/Ohm. If you don’t know the
resistance of the line and you cannot measure it, you can
make an estimation of the error caused by the line with
this table.
Temperature errors in °C / K
The table below shows temperature errors, at an ambient
temperature of 20° C, for different line lengths and
conductor cross sections for PT100 sensors.
Table 1
Temperature errors in C°/K
Line length in m
Wire size mm
2
0.50
0.75
1
1.5
10
1.8
1.2
0.9
0.6
25
4.5
3.0
2.3
1.5
50
9.0
6.0
4.5
3.0
75
13.6
9.0
6.8
4.5
100
18.1
12.1
9.0
6.0
200
39.3
24.2
18.1
12.1
500
91.6
60.8
45.5
30.2
Figure 5.24
PTC - 2 wire
1SFC132081M0201
PTC - 2 wire
23 24 25 26 27
T1 T2 T3
28 29 30
+(B) -(A)
+24V + GND
Analog out
Temp In
Com 3
5
Summary of Contents for PSTX Series
Page 1: ...1SFC132081M0201 Softstarters Type PSTX30 PSTX1250 Installation and commissioning manual...
Page 4: ......
Page 6: ......
Page 10: ...10 Introduction Installation and commissioning manual 1SFC132081M0201 1...
Page 16: ...16 Quick start Installation and commissioning manual 1SFC132081M0201 2...
Page 29: ...1SFC132081M0201 Installation and commissioning manual Description 29 3...
Page 30: ...30 Description Installation and commissioning manual 1SFC132081M0201 3...
Page 36: ...36 Installation Installation and commissioning manual 1SFC132081M0201 4...
Page 50: ...50 Connection Installation and commissioning manual 1SFC132081M0201 6...
Page 72: ...72 Human machine interface HMI Installation and commissioning manual 1SFC132081M0201 6...
Page 143: ...1SFC132081M0201 Installation and commissioning manual Functions 143 7...
Page 144: ...144 Functions Installation and commissioning manual 1SFC132081M0201 7...
Page 148: ...148 Communication Installation and commissioning manual 1SFC132081M0201 8...
Page 156: ...156 Maintenance Installation and commissioning manual 1SFC132081M0201 9...
Page 168: ...168 Troubleshooting Installation and commissioning manual 1SFC132081M0201 10...
Page 176: ...176 Wiring and application diagrams Installation and commissioning manual 1SFC132081M0201 11...
Page 181: ...1SFC132081M0201 Installation and commissioning manual Third party licenses 181 12...
Page 183: ...1SFC132081M0201 Installation and commissioning manual Revision 183 13...
Page 187: ...1SFC132081M0201 Installation and commissioning manual Index 187 14...