Parker AC20 Series - Page 73

DOC-0017-04-EN: AC20 Series - Hardware Installation Manual
DOC-0017-04-EN-A 22.03.2023 73 (154)
Configuration Setup:
TH1
Motor Thermistor ‘+’ connection
TH2
Motor Thermistor ‘-’ connection
DX1
Run Forward: 24V digital input
STOA
24V input connected i.e., STO DISABLED (drive operational)
STOB
24V input connected i.e., STO DISABLED (drive operational)
Minimum STO Implementation:
This example shows ‘STO Request’ contacts that are used to invoke STO on the drive. These contacts are
required to close prior to running the drive:
Configuration Setup:
TH1
Motor Thermistor ‘+’ connection
TH2
Motor Thermistor ‘-’ connection
DX1
Run Forward: 24V digital input
STOA
24V input connected via ‘STO Request’ contacts
STOB
24V input connected via ‘STO Request’ contacts
To run the drive:
1. Close the ‘STO Request’ contacts.
2. Close the ‘Run Forward’ contact.
To stop the drive:
1. Open the ‘Run Forward’ contact and wait for the motor to come to a standstill.
To invoke STO:
1. When the motor is at standstill, open the ‘STO Request’ contacts.
2. STO will now be ‘Active’ on the drive, for as long as required.
Note: Opening the ‘STO Request’ contacts when the motor is running will result in the motor
coasting to a stop.
STO Request