ABB Powernet EIB Manual De Instrucciones página 27

Fig. 2
Internal use of 24 V ~
L
N
NOTE
Bridges according to the number of operator inputs used.
The 24 V voltage generated by built-in device 6958 EB-500
corresponds to the safety extra-low voltage (SELV).
The Powernet EIB terminal can also be connected to a
different phase than the voltage supply of the device. In this
case, care must be taken when working on the unit that all
poles are disconnected.
a1
b1
a2
b2
a3
b3
a4
b4
N
L
GB
L
N