Vacon optbj Safety Manual

STO and SS1 safety functions vacon • 23Local contacts: https://www.danfoss.com/en/contact-us/contacts-list/5Figure 10 shows the connection principle of Safe Stop 1 safety function, as specified in figure 8.• The time delayed safety relay outputs are connected to the STO inputs.• A separate digital output from the safety relay is connected to a general digital input of theVACON® 100 family AC drive. The general digital input must be programmed to execute thedrive stop command and initiates the drive stop function without a time delay (must be set to"stop by ramp") and causes motor deceleration. If the SS1 behavior of Figure 8 is requiredthen it must be ensured that the ramp stop is activated when the stop signal is received. It isthe responsibility of the system designer to verify this. See Chapter 6.2 for the wiring andparametrization of Safe Stop 1.Figure 10. The connection principle of Safe Stop 1 (SS1)CAUTION! The system designer/user is responsible for understanding and settingthe time delay of the safety relay, as it is process/machine dependent.• The time delay must be set to a greater value than the deceleration time ofthe drive*. The motor deceleration time is process/machine dependent.• The stop function of the drive needs to be correctly set for the process/machine. Activating the SS1 safety function must execute the configuredstop in the drive. In the VACON® 100 default application software it is rec-ommended to use the "Quick Stop" functionality for this purpose.* In case of a single fault the drive may not ramp down but is only put to STO mode after the config-ured time delay.CAUTION! The control place must be set according to the application require-ments.MSwitchSafety Relaywith timerVacon 100controlBasic I/ODigital inputOPTBJ boardSTO channel 1STO channel 2TimedelayPower UnitRamp stopSTO1STO211577A_uk13006.emf13006.emf