Connecting the 24 V power supply
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Connection of incorrect battery packs Connecting the wrong battery packs can cause damage to the device and the battery packs.
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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 voltage 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:
- Install the power cable (see p. 30).
- Plug the power cable into the voltage socket of the industrial PC.
- Connect the industrial PC to your external 24 V power supply.
- Switch on the 24 V power supply.
- Measure the voltage at the voltage connector of the PC.
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:
- C9900-U330 (http://www.beckhoff.com/c9900-u330)
You can assign the UPS output of the PC (UPS Output). 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.
So that the industrial PC still has a monitor output in case of a power failure, a control panel can be connected to the UPS output (UPS OUT). Even after a power failure, 27 VDC is available there. The maximum load is 1.4 A (max. 2.5 A from year of manufacture 2016). Without the battery pack, the industrial PC and control panel switch off directly in the event of a power failure.
If the power supply unit in the industrial PC switches off, the UPS OUT output is set to 0 V. As a result, a connected control panel is also switched off. For more information on the battery pack, please refer to the corresponding manual.
Assembly of the supply cable
Before you can connect the power supply, you must install the power cable yourself according to the preceding wiring diagram. For this purpose, use the supplied material for connector assembly. This consists of the 5-pin connector and the strain relief housing with cable clamp and fixing screws.
First mount the plug on the cable as follows:
- Remove the insulation from the cable ends (8-9 mm).
- Plug the cable ends into the 5-pin connector by simply pressing them in according to the pin assignment sticker and wiring diagram (see p. 29). In the case of fine-core cables, you must use ferrules.
Assembly of strain relief housing
Now mount the strain relief housing on the previously connected plug and supply cable as shown in Fig. 21:
- 1. Press the lower part of the strain relief housing onto the connector until it engages (section A).
- 2. Fasten the supply cable to the strain relief housing using the cable clamp and fastening screws (section B).
- 3. Attach the upper part of the strain relief housing by snapping it onto the lower part (section C).
- You have successfully mounted the supply cable and fitted it with a strain relief housing (section D).
To remove the strain relief housing, proceed as follows:
- 1. Use your fingers to bend the latching lugs on the lower part slightly outwards (see Fig. 22).
- 2. Lever the upper part off the lower part.
- 3. Remove the cable clamp.
- 4. Remove the lower part of the strain relief housing.
- You have removed the strain relief housing.
