Connecting cables and power supply
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Incorrect connection procedure Incorrect procedure when connecting the cables and the power supply can cause hardware damage.
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Notice | |
Connection of incorrect battery packs Connecting the wrong battery packs can cause damage to the device and the battery packs.
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The connections are located at the rear of the panel PC in the connection compartment. The only exception is the separate USB interface behind the screw cap. The interface cables in the connection compartment are routed through the mounting arm tube. To gain access to the connection compartment, first remove the cover of the mounting arm adapter (see chapter 3.2 Interface description).
Connecting cables
Make sure that you first ground the PC (see chapter 4.3.1 Grounding the panel PC) and then plug in all data transmission lines.
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:
- Check the correct voltage of the external power supply.
- Plug the voltage connector into the voltage socket on the panel PC.
- Connect the PC to your external 24 V power supply.
- Switch on the 24 V power supply.
- Measure the voltage on the power supply plug of the PC.
After you have connected all data transmission lines and the power supply, you can fix the cables with cable ties to the strain relief plate inside the mounting arm adapter.
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:
- C9900-U330: battery pack for PCs with 24 V power supply unit and integrated UPS C9900-P209 or C9900-U209, external for DIN rail mounting, 3.4 Ah, operating temperature 0...50 °C, contains two closed lead-acid batteries VRLA-AGM
You can use the UPS output of the power supply unit and connect a Beckhoff control panel as a second display. If the supply voltage fails and the panel PC is only supplied by the battery pack, the control panel remains in operation. Second display operators can use it to read the power failure notification, back up data, and shut down the operating system.
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.
