TEC TECDrive20-EU Series - STO Function Installation Checklist; Layout Protection; Protecting the Inverter and Input Power Cable in Short-Circuit Situations

TECDrive20-EU Series Inverter Installation guidelines
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1: STO trigger delay: Time interval between trigger the STO function and switching off the
drive output.
2: STO indication delay: Time interval between trigger the STO function and STO output state
indication.
3.3.3 STO function installation checklist
Before installing STO, please perform self-inspection according to below table to ensure the
effectiveness of STO.
Item
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Ensure that the drive can be run and stopped freely during commissioning.
□
Stop the drive (if running), cut off input power and isolate the drive from the power cable
via the switch
□
Check STO circuit connection against circuit diagram.
□
Check that the shield of STO input cable is connected to +24V reference GND COM
□
Power on
□
Test the operation of STO when the motor is stopped:
 Give a stop command to the drive (if running) and wait until the motor shaft is at
standstill.
 Activate STO function and give a start command to the drive, ensure the motor stays
at standstill.
 Inactivate STO circuit.
□
Restart the drive and check if the motor runs normally
□
Test the operation of STO function when the motor is running:
 Start the drive and ensure the motor runs normally.
 Activate STO circuit.
 The drive reports STO fault (refer to fault and countermeasure in page X), ensure that
motor coast to stop and stops rotation.
 Inactivate STO circuit.
□
Restart the drive and check if the motor runs normally
3.4 Layout protection
3.4.1 Protecting the inverter and input power cable in short-circuit situations
Protect the inverter and input power cable in short circuit situations and against thermal
overload.
Arrange the protection according to the following guidelines.