Connecting the 24 V power supply

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.

As an alternative to the 100-240 V AC power supply unit in the basic configuration, you can order the industrial PC with a 24 V DC power supply unit. The options C9900-P208 without integrated UPS and C9900-P209 with integrated UPS are available.

Connect power supply via 24 V DC power supply unit

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 power supply connector of the industrial PC, so that the PC remains switched on during voltage fluctuations.

Proceed as follows to connect the 24 V DC power supply unit:

1. Mount the power supply cable (see Mounting power supply cable).
2. Plug the power supply cable into the power supply socket of the industrial PC.
3. Connect the industrial PC to your external 24 V power supply.
4. Switch on the 24 V power supply.
You have connected the device to the power supply.

External battery pack at C9900-P209

If you ordered your device with the C9900-P209 power supply unit 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 PC with a five-core sheathed cable. The method of connecting different components can be taken from the wiring diagram in fig. 22.

Connecting the 24 V power supply 1:Fig.20: Wiring diagram

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