ABB PSTX720 - Page 46

46 Connection | Installation and commissioning manual | 1SFC132081M0201
5.1.2.9 Close bypass PSTX470...PSTX1250
The built-in bypass contactor in PSTX470..1250 can be
controlled externally for an direct on line (across the line)
start. The built-in bypass contactor is closed by applying
voltage (100VAC/DC – 250VAC/DC) to terminal 2 and 3.
See Figure 5.20.
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
L
100-250V
50/60 Hz K4 K5 K6
Start Stop In0 In1 In2 GND +24V
N
1SFC132081M0201
Bypass
control
5.1.2.10 Modbus RTU
Connect digital ground from PLC to the PSTX ground,
terminal 19, 22 or 30.
Terminal 23 to 29 is non-isolated to GND. Terminal 30
is the same as terminal 19 and terminal 22. If voltage is
applied to any terminal 23-29 it may break depending on
the amplitude of the voltage.
Terminal 23 and 24 will break down if voltage are higher
than ±5,5V (relative ground) and have a current more than
150mA. If using different grounds between master and
PSTX make sure that they are totally isolated grounds and
that the master has isolated power. The master must not
have any offset to the PSTX ground.
Figure 5.21.
See chapter 8 Communication for communication
components.
5.1.2.11
PTC/PT100 input
If the motor has PTC or PT100 elements, connect the
cables to terminals 25, 26 and 27.
See
chapter7.14 Inputs/outputs for programming.
3-wire measurement for PT100
To reduce the influence of the wire resistance, you can
use a 3-wire connection. This creates 2 measuring
circuits. One circuit is used for reference. This way, the
tripping device can calculate the wire resistance. See
Figure 5.22.
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
1SFC132081M0201
Figure 5.20
Close bypass PSTX470...PSTX1250
1SFC132081M0201
Figure 5.21
Modbus RTU
PLC
23 24 25 26 27
T1 T2 T3
28 29 30
+(B) -(A) +24V + GND
Digital
GND
+ -
Analog outTemp InCom 3
1SFC132081M0201
Figure 5.22
PT100 - 3 wire
PT 100 - 3 wire
23 24 25 26 27
T1 T2 T3
28 29 30
+(B) -(A) +24V + GND
Analog outTemp InCom 3
1SFC132081M0201
5