Installation and Connection
3-42 | CFW-11M G2
3
3.3 SAFETY STOP FUNCTION
The CFW11MG2...O...Y... inverters have the SRB board that provides the Safety Stop function. Through this board
it is possible to control two safety relays (K1 and K2) which act directly on the power circuit, more specifically on
the power supply of the IGBT activation fiber optics. The safety relays ensure that the IGBTs remain turned off
when the Safety Stop function is activated, even in case of only one internal fault. The position of the SRB boards
and terminals XC25 (Safety Stop control terminals) on the inverter is shown in
The Safety Stop function prevents the accidental start of the motor.
SRB Board
XC25
Figure 3.47:
Location of the SRB board on the control rack
DANGER!
The activation of the Safety Stop function does not ensure the electrical safety of the motor terminals
(which are not isolated from the power supply in such condition).
DANGER!
L'activation de la fonction d'arrêt de sécurité ne garantit pas la sécurité électrique des bornes du
moteur (elles ne sont pas isolées de l'alimentation électrique dans cet état).
ATTENTION!
In case of a multiple fault in the power stage of the inverter, the motor shaft can rotate up to 360/
(number of poles) degrees even with the activation of Safety Stop function. That must be considered
in the application.