Power supply

An external 24 V DC power supply is required for the embedded PC and the EtherCAT Terminals for grid data acquisition (24 V DC, -15 % / +20 %).

To ensure operation of the PGP controller even in the event of a power failure, an uninterruptible power supply (UPS) must be provided. Typically, a holding time of at least 30 minutes is required. The UPS is dimensioned on the basis of the determined energy requirement.

When designing the power supply, fuses and UPS, the maximum power consumption of the respective embedded PC must be taken into account (see Components).

The typ. power consumption of the embedded PCs without peripherals:

• CX8290: 4 W
• CX9240: 7 W
• CX5330: 16 W
• CX5340: 18 W

In the event of a power failure, a corresponding message from the UPS must be transferred to TcPowerPlantControl via the bSupplyError flag in the Control area of the input process data (see Behavior in the event of a power supply failure).

Suitable UPS modules