Safe Torque Off (X4) - ABB ACQ580-34 Hardware Manual

input and output as shown below. Leave the other end of the shield unconnected or ground
it indirectly via a few nanofarads high-frequency capacitor, for example, 3.3 nF / 630 V. The
shield can also be grounded directly at both ends if they are in the same ground line with
no significant voltage drop between the end points.
T
1. Set the input type to voltage for analog input AI1 or analog input AI2 with parameters. Set the appropriate
analog input unit to V (volt) in parameter group 12 Standard AI.
2. Select the excitation mode in parameter group 13 Standard AO.
WARNING!
As the inputs pictured above are not insulated according to IEC 60664, the
connection of the motor temperature sensor requires double or reinforced insulation
between motor live parts and the sensor.
If the assembly does not fulfill this requirement, the I/O board terminals must be
protected against contact and must not be connected to other equipment or the
temperature sensor must be isolated from the I/O terminals.
￭

Safe torque off (X4)

For the drive to start, both connections (+24 V DC to IN1 and +24 V DC to IN2) must be
closed. By default, the terminal block has jumpers to close the circuit.
Remove the jumpers before connecting an external Safe torque off circuitry to the drive.
See also chapter The Safe torque off function (page
Note: Only 24 V DC can be used for STO. Only PNP input configuration can be used.
1...3 x (Pt100 or Pt100) or
1 x (Ni1000 or KTY83 or KTY84)
T
T
AIn
AGND
AOn
AGND
135).
Control unit 79
1)
2)