Accelnet Plus Micro Modules User Guide
16-01687 Rev 03
Copley Controls
Page 91 of 139
6
S
AFE
T
ORQUE
O
FF
(STO)
–
U
SE
,
C
ONNECTIONS AND
W
IRING
O
VERVIEW
This chapter is intended to inform the reader about the Functional Safety features of the
AEV & APV
drives and to provide
information on the steps required to install it into systems so that a target level of Functional Safety performance can
be achieved. The scope of this document is limited to those aspects of Functional Safety that relate to the installation,
operation, and maintenance of the
AEV & APV
drives
D
ISCLAIMER
This manual contains information on the Safe Torque Off (STO) feature of the AEV & APV drives
and how it may be incorporated into an industrial motion control system. While every effort has
been made to ensure the completeness and accuracy of this manual it must be emphasized that
the responsibility for functional safety in the overall system into which the drive is installed rests
ultimately with the manufacturer of the system into which the AEV & APV drives are installed.
The equipment manufacturer must take into account all the aspects of the system in which the
AEV & APV drives are components.
Copley Controls does not accept any liability for direct or indirect injury or damage caused by
the use of information in this document. The equipment manufacturer is always responsible for
the safety of its product and its suitability under applicable laws. Copley Controls hereby
disclaims all liabilities that may result from this document.
R
ISK
A
SSESSMENT
&
R
ESPONSIBILITY OF THE
I
NSTALLER
The STO feature of the
AEV & APV
drives is capable of the safety integrity level (SIL) and
category/performance level (PL) stated in this manual and operates in accordance with the
characteristics and limitations described herein. But it must be noted that the drive STO function
is intended to be used only as one element of an overall safety chain and is not a complete
safety function unto itself. Therefore the suitability for use of the
AEV & APV
drives in a given
application must be determined in part by one or more risk assessments of the overall safety of
the end machine conducted in accordance with the applicable standards. Such risk assessments
normally consist of a thorough review of overall machine operation to identify potential hazards.
For each identified hazard, typical risk assessments take into account the severity of any
potential injury resulting from the hazard, the frequency of exposure of persons to the hazard
and the probability that persons are able to avoid the hazard if it were to occur. The machine
designer is solely responsible for conducting any necessary risk assessments and for the ultimate
determination as to the suitability of the
AEV & APV
drives and the STO function for use in
realizing a given overall safety function. The installer should be experienced in motion control
and functional safety.
O
PERATE DRIVES WITHIN THE SPECIFICATIONS PROVIDED IN THIS DOCUMENT
The information in this manual is specific to the functional safety features of the AEV & APV
drives. The user must use this manual for proper and safe installation and overall commissioning
of the drives.
R
ISK OF ELECTRIC SHOCK
The AEV & APV drives are made for operation from transformer-isolated, DC power supplies. Therefore
hazardous voltages are connected to and exist within these drives under normal operating conditions.
Persons responsible for installing and commissioning these drives must be experienced in all aspects of
electrical equipment installations