Minimum Sto Implementation - Parker AC30P Hardware Installation Manual

8-20
Safe Torque Off

Minimum STO Implementation

This example shows the minimum connections required. To reset from STO requires that STO Request contacts are closed to permit normal drive
operation. The user must do a risk assessment to ensure that all safety requirements are met. The user must select and assess appropriate equipment.
DRIVE
START
X13/02
Note: all wiring shown is within the control cubicle.
24VDC
DRIV
STO
E
REQUEST
X12/01 X10/01 X10/03
INVERTER STO
X10/02 X10/04
To run the drive:
Ensure the STO Request contacts are closed.
Press the DRIVE START button.
To perform operational (not STO) stop:
Press the DRIVE STOP button.
Wait for the motor to come to rest.
To invoke STO:
Press the DRIVE STOP button.
X10/06 X12/05
Wait for the motor to come to rest.
Open the STO Request contacts simultaneously. The
contacts must remain open for the entire duration that STO
is required: they must not be momentary action switches.
The drive will confirm via X10/05 that STO has been invoked
X10/05
by the lamp being ON.
X12/06
If the lamp is OFF, do not access the machine as a fault may
be present.
Note: if the STO Request contacts open while the motor is
rotating, the motor will coast to rest (unless external forces
act on it).
AC30 series Variable Speed Inverter