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.
Connecting cables
Make sure that you first ground the PC (see chapter 4.3.2 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. First mount the power supply cable with the 8-pin connection strip without its strain relief housing.
- 2. Plug the voltage connector into the voltage socket on the panel PC.
- 3. Screw the voltage connector to the voltage socket.
- 4. Connect the PC to your external 24 V power supply.
- 5. Switch on the 24 V power supply.
- 6. Measure the voltage at the 8-pin connection strip of the PC.
- 7. Mount the strain relief housing on the 8-pin connection strip.
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:
Order identifier | Version |
|---|---|
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 in fig. 19.
