Diagnostics Contact Diag1 / Diag2; Auxiliary Supply; Actuating A Brake - Festo CMMO-ST Notice D'utilisation

CMMO-ST Safe torque off
Reaction to test impulse
Short test impulses from safety controls are tolerated and so do not cause a request of the STO func-
tion. Chapter 5.4 describes tolerance to OSSD signals (OSSD = "Output Signal Switching Device"). The
permissible test impulse is also dependent on the height of the control voltage at the inputs STO1 and
STO2.
2.2.2

Diagnostics contact Diag1 / Diag2

The status of the STO function can be reported to an external safety switching device via the potential-
free acknowledgment contact (N/O contact).
– STO function inactive: Diagnostics contact open.
– STO function active: Diagnostics contact closed.
Chapter 5.4 describes the electrical data and the runtime performance of the diagnostics contact.
The diagnostics contact is equipped with one channel and may be used for diagnostics
purposes, but must not be used in the safety circuit.
2.2.3 Auxiliary supply +24 V
[X3] supplies a 24 V auxiliary supply at pin 1. This can be applied when the acknowledgment contact
(pin 4/5) is used or to supply external sensors. Chapter 5.4 describes the electrical data of the auxiliary
supply.
2.3

Actuating a brake

Note
Deactivation of one of the control ports STO1 or STO2 while the motor is running and
the holding brake is not connected causes a an unbraked coasting of the motor. This
can lead to damage to the machine.
• Check to see whether a holding brake needs to be connected to the motor
controller / actuator.
• Check to see whether the motor with holding brake you are using is equipped to
brake the motor to a standstill with the holding brake in case of a fault.
Note
A brake is actuated by the non-safety-relevant firmware of the motor controller.
Festo – CMMO-ST Safe torque off – 1210a English 29