3
Safety concept
General information
Manual – MOVISAFE
®
CSB51A Safety Option
12
3
Safety concept
3.1
General information
The MOVISAFE
®
CSB51A safety option is a safe electronic assembly with a safe, in-
ternal output that can be activated via safe communication.
MOVISAFE
®
CSB51A is completely integrated in the basic device. MOVISAFE
®
CSB51A uses the safe fieldbus to activate the STO drive safety function inside the
device. Instead of galvanic isolation of the drive from the supply system by means of
contactors or switches, the disconnection via STO within the device safely prevents
the control of the power semiconductors in the output stage. The rotary-field genera-
tion for the respective motor is deactivated even though the line voltage is still present.
The safety concept is based on a safe state existing for all safe process values. A safe
state of the MOVISAFE
®
CSB51A safety option is defined as follows:
•
The internal output F-DO_STO is disabled. This activates the STO drive safety
function.
•
Either substitute values are sent for the data via the F-protocol (i.e. all data is "0")
or the communication is interrupted.
3.2
Notes on stop categories
•
The STO function corresponds to stop category 0.
•
The SS1(c) function corresponds to stop category 1.
3.3
Memory module
When switching on the basic device with the MOVISAFE
®
CSB51A safety option, the
memory module must be plugged in.
The parameterization data of the MOVISAFE
®
CSB51A safety option is divided into
application-related data and the key data set. The key data set ensures the data inte-
grity.
The application-related data is stored in the basic device. The application-related data
is released by means of the key data set on the memory module. The safety option
becomes operational only if the key data set on the memory module matches the pa-
rameterization.
The memory module is also used to establish a location reference in the system.
Since the application-related data set is released only with the matching key data set
on the memory module, the location reference can be established in this way. It is the
user’s responsibility to secure the location reference of the memory module in the sys-
tem. The data for safe communication is also stored on the memory module because
this data has the same location reference. This ensures that, in the event of a device
replacement, the application-related data and the communication data are available
again immediately.
25931075/EN – 04/2019
