Mounting and wiring
3.2
Wiring
3.2.1
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!
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.
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.
LED
If the power supply unit is connected correctly and the power supply is switched on, the two upper LEDs in
the terminal prism are green. The left LED (Us) indicates the CPU supply. The right LED (Up) indicates the
terminal supply. The other LEDs indicate the Terminal Bus status. A detailed description of the LEDs can be
found in section "LED troubleshooting".
CAUTION
Power contact PE
The PE power contact must not be used for other potentials.
CX8080
16
Version: 1.0.0
