Readers
5.6 SIMATIC RF685R
SIMATIC RF600
198
System Manual, 06/2019, J31069-D0171-U001-A22-7618
Note
Requirement for external power sources
When the DI/DQ interface is supplied with power by an external power source, this source
must meet the requirements for LPS (Limited Power Sources) and NEC Class 2.
Color scheme of the DI/DQ standard cable with M12 connector
The following figure shows the color scheme of the DI/DQ standard cable from Siemens
(6GT2891-0CH50). You can use the color scheme to assign the wire colors to the pins.
Figure 5-33 Wiring diagram: M12 connector
5.6.1.4
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 (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.
