CG Emotron OSTO 100, Instruction Manual

Page: 47 / 112

CG Drives & Automation 01-7513-11r0 Appendix 47
9.4 Connection examples
In the case hanging/suspended or tensioned load like e.g. cranes, hoists is used
in the application it will require additional brakes or mechanical interlocks to
avoid dropping loads.
EN IEC 60204-1 defines 3 stop categories:
• Category 0: Uncontrolled STOP
Stopping by immediate removal of power to the machine actuators (i.e. an
uncontrolled stop where the motor output is de-energized).
• Category 1: Controlled STOP / removal actuator power
A controlled stop with power available to the machine actuators to achieve
the stop and then removal of power when the stop is achieved.
• Category 2: Controlled STOP / power remains on actuators
A controlled stop with power remaining available to the machine actuators.
The above stop categories are just describing different stop methods, i.e. they
are not related to any safety classification. The above stops may be implemented
w/o any safety at all or alternatively fulfilling e.g. SIL 1-3 depending on
connections and external safety equipment.
Using Emotron OSTO_100 option as standalone will result in stop category 0
as it will de-energize the IGBT gate driver circuitry which in turn will result in a
coasting motor (uncontrolled stop).
NOTE: The following examples are general connections examples of STO
and Safe Stop category 1 time controlled stop (SS1-t).
WARNING! The standard specifies that all machines must be
provided with a category 0 stop. If the application prevents this
from being implemented, this must be explicitly stated.
Furthermore, every machine must be provided with an
emergency stop function. This function must ensure that any
dangerous voltage on the machine is dis-connected as quickly
as possible without the risk of further danger. In such an
emergency stop situation, a category 0 or 1 stop may be used;
the choice of category depends on the possible risks to the
machine.