Digital modules
8.5 SM 326; DO 8 x DC 24V/2A PM
Fail-safe signal modules
140 Installation and Operating Manual, 01/2010, A5E00085586-10
Technical data
Internal limit of the inductive shutdown voltage
Typical L+ (-33 V)
Short-circuit protection of output Yes, electronic
Response threshold
2.6 to 4.5 A
Actuator timing requirements Actuator must not react within dark period < 1 ms
(see also chapter "Sensor and Actuator
Requirements for F-SMs in Safety Mode
(Page 47)")
Wire break detection
For "1" signal
1 s
For "0" signal
100 s
Time, Frequency
Internal signal preparation time in safety mode Min. 4 ms
Max. 14 ms
Acknowledgment time in safety mode Max. 18 ms
Note
The maximum cable lengths currently specified in this manual ensure against functional
impairment, even without more precise examination of the boundary conditions. If the
boundary conditions, such as EMC, cable type, cable routing, etc. are examined more
closely, longer cables can be used for all F-SMs.
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