Connecting cables and power supply

Notice

Incorrect connection procedure

Incorrect procedure when connecting the cables and the power supply can cause hardware damage.

  • Follow the documented procedure for connecting the cables and the power supply.
  • Always connect all cables first and only then switch on the power supply.
  • Please read the documentation for the external devices prior to connecting them.

Notice

Connection of incorrect battery packs

Connecting the wrong battery packs can cause damage to the device and the battery packs.

  • Only connect the C9900-U330 Beckhoff battery pack to your device.

The connections are located at the rear of the panel PC in the connection compartment. The interface cables are routed through the mounting arm tube. To gain access to the connection compartment, you must first remove the two plastic caps (see chapter 3.2 Interface description).

Connecting cables

Make sure that you first ground the panel PC (see chapter 4.3.1 Grounding the panel PC) and then plug in all data transmission cables.

Connecting the power supply

Cables with a maximum cable cross-section of 1.5 mm2 can be used for connecting the power supply. For long supply lines, use 1.5 mm2 cables to achieve a low voltage drop on the supply line. There should be at least 22 V at the voltage connector of the panel PC, so that the PC remains switched on during voltage fluctuations.

Proceed as follows to connect the 24 VDC power supply unit:

1. Plug the power supply cable into the power supply socket of the panel PC.
2. Connect the panel PC to your external 24 V power supply.
3. Switch on the 24 V power supply.

External battery pack

If you ordered your device with an integrated UPS, then you can connect an external battery pack and install it on a DIN rail near to the PC. Use only Beckhoff battery packs for this:

PIN 4 and 5 of the battery pack are available for looping through a 24 V power supply. Accordingly, you can connect a three-core sheathed cable with plus and minus of the supply voltage as well as protective earth to the battery pack and then connect to the panel PC with a five-core sheathed cable. The method of connecting different components can be taken from the wiring diagram in fig. 9.

Connecting cables and power supply 1:Fig.9: Wiring diagram

For more information on the battery pack, please refer to the corresponding manual.