Connecting power supply, Cable cross sections, Check voltage rating and connect – BECKHOFF CP32xx User Manual

Page 21: Configuration for shutting down the pc, Pc_on and power status functions, 4 connecting power supply

Mounting

4.4 Connecting Power Supply

The external wiring consists of the connection of the power supply, the battery pack (optional) and the
connection of customized components for shutting down the PC.

4.4.1 Cable Cross Sections

For the connection of the power supply, wiring with a cable-cross-section of 1.0 mm

must be used.

With bigger distances between voltage source and PC, you take the voltage drop as a function of the
cable-cross-section as well as voltage fluctuations of your distribution voltage into account, so that is
secured that the voltage doesn't fall under 22 V at the power supply.

Connecting with bigger distances between voltage source and PC

Note

To avoid voltage drop, the battery pack and the power supply each can be connected by
using a second cable.

Insert fuse

Attention

The power supply must be protected with maximum 10 A.

4.4.2 Check voltage rating and connect

Fitted with the 24 V

power supply unit:

1. Check that the external power supply is providing the correct voltage.

2. Insert the power supply cable that you have assembled into the Industrial PC's power supply

socket. Then connect it to your external 24 V power supply.

Use same type of rechargeable battery

Attention

If a 24 V UPS is installed, the same type of rechargeable battery must be used.

4.4.3 Configuration for shutting down the PC

The connections for shutting down the Industrial PCs are established via the PC_ON input and the Power
Status output.

4.4.4 PC_ON and Power Status functions

• If the PC_ON input is connected to 24 V via a switch, the PC shuts down according to the rules.

The PC_ON signal is inverted, i.e. the PC shuts down if the 24 V connection is live.

• If the PC_ON input is NOT connected by the user, the PC can be booted in the familiar way by

connecting the supply voltage and shut down via the battery by switching off the supply voltage.

Service life of the rechargeable battery

Attention

This procedure significantly reduces the service life of the rechargeable battery and
should therefore not be used.

• Once the PC has shut down, the Power Status output is switched from 24 V to 0 V. Via this

output a signal lamp can be connected or a contactor for de-energizing the whole system. The
maximum load for the Power Status output is 0.5 A and a suitable fuse should be provided.

CP32xx