Bosch Rexroth ctrlX SAFETY, Руководство по применению

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4 System overview
4.1 Introduction
4.1.1 Motivation and objectives
Overview
The operational safety of machines and installations depends largely upon
the extent of dangerous movements generated by the machine.
In normal operation (also called productive operation or automatic operation),
protective equipment prevents individuals from accessing danger zones and
keeps parts / materials from being thrown outwards.
In the special mode (also called manual mode or setting-up mode), it is often
necessary for individuals to access danger zones when the entire installation
has not been de-energized. In these situations, machine operators must be
protected by internal mechanisms in the drive and the control unit.
The integrated Rexroth safety technology provides the user with the
requirements, on the control unit and drive side, for implementing functions of
personal and machine protection with a minimum of planning and installation
work. Compared to conventional safety technology, the integrated safety
technology considerably increases the functionality and availability of
machines. Integrated safety technology is characterized by the following
features:
●
Complies with valid standards
● More system performance
● Less system costs
● Easy understanding of complex subjects
● Improved diagnostics
● Simplified certification
● Easy commissioning
● Independent of control units
Comparison with conventional safety technology
A drive and control system with integrated safety technology differs from
systems with conventional safety technology by the fact that the safety
functions are directly integrated in the intelligent drives in the form hardware
and software. This increases the functionality in all operation modes with a
maximum of safety (short reaction times).
The power contactor between controller and motor required for the
conventional safety technology is not included in drive and control systems
with the integrated safety technology "Safe Torque Off".
The integrated safety technology is not intended to replace
conventional safety technology, such as EMERGENCY STOP
monitoring devices and safety door monitors.
Using the integrated safety technology increases the available personnel and
machine safety, because the total reaction time of the system in the case of
an error event, for example, is considerably reduced with regard to
comparable systems with conventional safety technology. The safety signals
are transmitted with conventional wiring.
ctrlX SAFETY "Safe Torque Off" Safety Option in ctrlX DRIVE 15/65
System overview
R911383774_Edition 03 Bosch Rexroth AG