Mounting and wiring
CX8095
21
Version: 1.5
5.2
Wiring
5.2.1
Power supply
WARNING
Risk of injury through electric shock and damage to the device!
Bring the CX80xx into a safe, de-energized state before starting assembly, disassembly or
wiring!
CAUTION
Connections as ignition source in potentially explosive atmospheres
Gases or dusts can be ignited by a spark discharge when the Embedded PC is wired.
Switch off the power supply and wait until the 1-second UPS has discharged. Ensure that
there is no explosive atmosphere before you wire the Embedded PC and connect or dis-
connect Bus Terminals.
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 spring-loaded terminals with the designation 24 V and 0 V.
The supply voltage supplies the CX system and, via the terminal bus, the Bus Terminals with a voltage of 24
V
DC
(15 %/+20 %). The dielectric strength of the power supply is 500 V. Since the Terminal Bus (K- and E-
bus) 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. Only 24 V DC may be
connected to the power contacts; the maximum current load of the power contacts is 10 A.
CAUTION
Power contact PE
The PE power contact must not be used for other potentials.
Requirements for the power supply (24 V)
In order to guarantee the operation of the CPU (CX80xx module) and the terminal strand in all cases, the
power supply must supply 2.0 A at 24 V.
