Power supply
The panel PC is supplied with a nominal voltage of 24 V. The connection to the power supply and the external wiring of the device are made via the 8-pin voltage socket (X111). The main supply voltage is applied between PIN 5 (0 V) and PIN 6 (+24 V) of the socket. If the device is equipped with an integrated uninterruptible power supply (UPS), an external battery pack can also be connected to PIN 1 and PIN 2.
Fig.4: Voltage socket pin numberingPin | Signal | Description |
|---|---|---|
1 | - BAT | Negative pole of the battery pack |
2 | + BAT | Positive pole of the battery pack |
3 | 24 V UPS | 24 V UPS output 2.5 A, minus is – BAT |
4 |
| Protective earth |
5 | - | 24 V supply voltage, negative pole |
6 | + 24 V | 24 V supply voltage, positive pole |
7 | PC-ON | Input PC-ON |
8 | P-S | Power Status output, minus is the negative pole of the supply voltage |
To operate the buffered 24 V output, you must use PIN 1 (-) and PIN 3 (+).
The plug for the power supply is specified for 8 A and can accommodate wire cross-sections of up to 1.5 mm2. For long supply lines, use 1.5 mm2 cables to achieve a low voltage drop on the supply lines. At least 22 V should be present at the power supply plug of the device so that the device remains switched on in the event of voltage fluctuations. The plug is included in the delivery. You can obtain a replacement plug from your Beckhoff Sales using the following ordering option: C9900-P926.