3
Safety concept
General
Manual – MOVISAFE
®
CS..A Safety Card (Version 2)
15
3
Safety concept
3.1
General
The MOVISAFE
®
CS..A safety card is a safe assembly with safe digital inputs and out-
puts and, depending on the parameterization, safe communication.
MOVISAFE
®
CS..A is fully integrated in the MOVIDRIVE
®
modular/system/technology
inverters. This means that MOVISAFE
®
CS..A inside the devices activates the STO
drive safety function of the inverter. 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 generation 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
®
CS..A safety card is defined as follows:
•
The internal output F-DO_STO is disabled. This activates the STO drive safety
function.
•
All other existing safe digital outputs are disabled.
•
With parameterized safe communication, either substitute values are sent for the
data (i.e. all data is "0"), or the communication is interrupted.
3.2
Notes on stop categories
•
The STO drive safety function corresponds to stop category 0.
•
The SS1(c), SS1(b) and SS1(a) drive safety functions correspond to stop category
1.
•
The SS2(c), SS3(b) and SS2(a) drive safety functions correspond to stop category
2.
28482271/EN – 03/2019
