Torque Enable Functional Description - Parker IPA Series Hardware Installation Manual

Warning:
It is the user's responsibility to:
1. Risk assess the machine.
2. Design, implement and assess an appropriate solution for each application to meet all relevant
safety requirements.
Note: Torque Enable is an electronic inhibit intended for use during normal operation of the
machine. It is not intended for use during machine maintenance, repair, replacement or
other similar activities. For these activities, recognized electrical power isolation devices
and lock-off procedures should be used.

Torque Enable Functional Description

The IPA provides dual Torque Enable channels as a means of preventing the drive from delivering rotational force
to its connected electric motor or linear force for a linear motor. To ensure a high degree of safety, two
independent Torque Enable control channels are implemented in hardware. The Torque Enable circuit in the IPA is
designed such that a fault in one control channel will not affect the other channel's ability to prevent the drive
from starting, i.e. the Torque Enable function of the IPA drive is tolerant to any single fault. It may not be tolerant
to an accumulation of faults. If one or both Torque Enable control inputs requests the torque to be disabled, the
drive will not start, even if the drive's software malfunctions and tries to cause the motor to turn.
The Torque Enable function is implemented in hardware and overrides all software activities. The only software
involvement is to report torque status to the user via error and fault bits.
TORQUE ENABLE SAFETY CIRCUITRY
THIS EQUIPMENT IF USED INCORRECTLY IS
POTENTIALLY DANGEROUS. THEREFORE UNDER NO
CIRCUMSTANCES SHOULD IT BE USED BEFORE THESE
INSTRUCTIONS HAVE BEEN READ AND UNDERSTOOD BY
THE END USER WHO SHOULD BE APPROPRIATELY
QUALIFIED TO OPERATE THE EQUIPMENT.
IPA Hardware Installation Guide 79