Readers
5.2 SIMATIC RF615R
SIMATIC RF600
100 System Manual, 11/2018, J31069-D0171-U001-A21-7618
5.2.1.4 Switching scheme for the DI/DQ interface
Connection possibilities
You can connect the reader in different ways. In general, the outputs and inputs should be
connected as follows:
Output (DQ)
● The output is rated for 0.5 A current (at < 20 °C; 0.33 A at 55 °C) and electronically
protected.
● The output is electrically isolated via optocoupler.
Input (DI)
● The input is set up with electrical isolation via optocoupler.
● Level
– Low: 0 ... 7 V
– High: 15 ... 24 V
● Sampling rate
< 20 ms
The following diagrams illustrate various connection possibilities.
Note
Minimum time between changes
Note that changes on the I/O interface that are not applied for at least 1.5 seconds are not
detected by the re
ader.
Voltage infeed from external source
Figure 5-1 Circuit example 2: Digital input
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