Siemens AS-i Master CM 1243-2 a Manual page 27

Note
A connected power supply unit must comply with the PELV/SELV (Protective Extra Low
Voltage/Safety Extra Low Voltage) standard and have a residual ripple of < 250 mVpp.
The power supply unit used must limit the output voltage to a maximum of 40 V in the event
of a fault.
Additional information on the electrical connections
Read section Installation, connection and commissioning of the modules (Page 29) for
instructions on connecting the electrical connections.
You can find technical details on the electrical connections in section Technical data
(Page 109).
AS-i master CM 1243-2 and AS-i data decoupling unit DCM 1271 for SIMATIC S7-1200
Manual, 04/2013, A5E02655230010A/RS-AA/003
Displays and connections of the AS-i data decoupling unit DCM 1271
3.1 LEDs of the AS-i data decoupling unit DCM 1271
27