Siemens S7-300 Installation And Operating Manual page 180

Digital modules
8.7 SM 326; F-DO 10 x DC 24V/2A PP (6ES7326-2BF10-0AB0)
Switching frequency
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Internal limit of the inductive shutdown voltage
Short-circuit protection of output
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Actuator timing requirements
Time, Frequency
Internal preparation time for
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Acknowledgment time
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Note
To reach the maximum cable length, it may be necessary to increase the settings for
maximum light test time or maximum read-back time dark test.
We also recommend a more detailed consideration of the boundary conditions, such as
EMC, cables used, cable guide, etc.
180
With resistive load
with inductive load (see chapter "Switching
capacitive and inductive loads (Page 327)")
With inductive load in accordance with IEC 60947-5-
1, DC 13
With lamp load
Response threshold
Response threshold of redundant interconnection
Safety mode
Redundant safety mode
In safety mode
Technical data
25 Hz symmetrical, maximum
25 Hz symmetrical, maximum
0,5 Hz symmetrical, maximum
10 Hz symmetrical, maximum
type L+ (-33 V)
Yes, electronic
2.6 to 4.5 A
2.6 to 9 A
Actuator must not respond if:
Dark period < 0.6 ms

Light period < 0,6 ms

(refer to chapter "Sensor and Actuator
Requirements for F-SMs in Safety Mode
(Page 47)")
Max. 8 ms
Max. 8 ms
Max. 10 ms
Installation and Operating Manual, 01/2010, A5E00085586-10
Fail-safe signal modules