BECKHOFF CX9020 - Manual (Page 19)

Mounting and wiring
3.4 Power supply
This power supply unit is equipped with an I/O interface, which permits connection of the Beckhoff Bus
Terminals. The power is supplied via the upper spring­loaded terminals labeled “24V” and “0V”.
The supply voltage supplies the CX system ant the terminal Bus and Bus Terminal with a voltage of 24 V DC
(­15 %/+20 %). The dielectric strength of the power supply unit is 500 V
rms
. Since the Terminal Bus (K­ and
E­bus) only transfers data, a separate power supply is required for the Bus Terminals. This is provided by
means of the power contacts, which are not connected to the power supply.
Requirements for the 24V power supply
The power supply must be capable to supply 4A at 24 V to guarantee proper function of CPU CX9020
module and terminals.
CX9020 19 Version 1.1