Siemens SIMATIC RF600 Series System Manual page 96

Readers
5.2 RF650R reader
5.2.1.4 Connection scheme for the digital I/O interface
Connection possibilities
You can connect the reader in different ways. In general, the outputs and inputs should be
connected as follows:
Output (DO 0 ... 3)
● Each output is rated for 0.5 A current and is electronically protected.
● 4 digital outputs can be operated simultaneously each with up to 0.5 A (up to 1 A in total).
With a total current > 1 A, you need to use an external power supply.
● The outputs are optically isolated through optocouplers.
input (DI 0 ... 3)
● The inputs are optically isolated through optocouplers.
● 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 reader.
96
System Manual, 10/2016, J31069-D0171-U001-A19-7618
SIMATIC RF600