ABB PSTX720 - Page 47

1SFC132081M0201 | Installation and commissioning manual | Connection 47
2-wire measurement for PT100
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. Connect a jumper between the terminals
26 and 27. Use Table 1 Temperature errors in C°/K
to determine the temperature errors caused by the line
length. See Figure 5.23
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 outTemp InCom 3
1
SFC132081M0201
Figure 5.23
PT100 - 2 wire
PT 100 - 2 wire
23 24 25 26 27
T1 T2 T3
28 29 30
+(B) -(A) +24V + GND
Analog outTemp InCom 3
1SFC132081M0201
5