X3] Sto Interface; Switching Statuses - Festo CMMO­ST-DION Serie Manual De Instrucciones

CMMO­ST-...-DION/DIOP
2.3

[X3] STO interface

2.3.1

Switching statuses

STO control ports:
As long as a logic 1 (+24 V DC) is present at both control ports, the motor can be operated.
If there is a logic 0 (0 V DC) at one or both of the control ports, the power supply to the motor is inter­
rupted. If both STO inputs receive logic 1 again, the controller enable must be reset via [X1.10] ENABLE.
Acknowledgment contact DIAG:
The acknowledgment contact is closed when the STO function is active.
The acknowledgment contact is open:
– In the event of a failure of the logic voltage or supply voltage
– If the STO function is inactive
STO1 STO2 DIAG1/DIAG2
1 1 high
impedance
(open)
1 0 high
impedance
(open)
0 1
0 0 low
impedance
(closed)
Tab. 4 Switching logic of the control ports STO1/STO2
Switching statuses [X3.1]
Control ports STO1/STO2
Logic 1
Logic 0
Acknowledgment contact DIAG
Closed: Max. internal resistance
Open: Residual current
1) Intermediate area undefined
Tab. 5 Electrical data of switching statuses [X3]
The control ports are also protected against polarity reversal, but are not equipped with
voltage monitoring. If required, voltage monitoring must be realized through additional
measures.
Festo – GDPC-CMMO­ST-EA-S1-Z6 – 1506c – English
Status
Normal operation
– Output stage is switched on.
– STO function is inactive.
The STO function has been requested on one channel, e.g. in the
event of a failure of a channel:
– The output stage is switched off on one channel.
– The motor can no longer be operated.
– STO function is inactive.
The STO function has been requested on two channels.
– The output stage is switched off on two channels.
– The motor can no longer be operated.
– The STO function is active.
1)
[V DC]  18
[V DC]  5
[Ω]
[μA]
 40
 2
31