Connecting the 24 V power supply

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 C9900-P229 option is available for this purpose.

Connect power supply via 24 V DC power supply

To connect the power supply, you must use cables with a wire cross-section of 4 mm2 and a maximum length of 10 m in order to achieve a low voltage drop on the supply line. There should be at least 22 V at the power supply 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:

1. Install the power supply cable (see the following section "Mounting the supply line").
2. Plug the power supply cable into the power supply socket of the industrial PC.
3. Connect the industrial PC to your external 24 V power supply.
4. Switch on the 24 V power supply.
You have connected the device to the power supply.
Connecting the 24 V power supply 1:Fig.23: Wiring diagram

Before you can connect the power supply, you must install the power supply line yourself. For this purpose, use the supplied material for connector assembly. This consists of the 3-pin connector and the strain relief housing.

Mounting the supply line

First mount the plug on the cable as follows:

1. Remove the insulation from the cable ends (8-9 mm).
2. Plug the cable ends into the connection strip by simply pressing them in. For the pin assignment of the connector, see Chapter Power supply.
Connecting the 24 V power supply 2:Fig.24: Mounting the supply line
You have fitted the supply line to the plug.

Assembly of strain relief housing

Now fit the strain relief housing to the already connected plug and supply line:

1. Insert the plug into the open strain relief housing with the cable leading up to the edge. Make sure that the pin numbering on the plug points in the same direction as the sticker on the strain relief housing (section A).
Connecting the 24 V power supply 3:Fig.25: Insert plug
2. Press the plug against the underside of the strain relief housing until it clicks into place.
3. Press the top of the strain relief housing onto the lower part until the tabs have slipped over the latching lugs (section B).
4. Tighten the M2 screw on the side (section C).
Connecting the 24 V power supply 4:Fig.26: Close the strain relief housing
You have mounted the strain relief housing.

To dismantle the strain relief housing, proceed as follows:

1. Release the M2 screw on the side (section A).
2. Use your fingers to bend the five tabs slightly outwards (section B).
Connecting the 24 V power supply 5:Fig.27: Loosen the strain relief housing
3. Pull the upper section off the lower section until the tabs slide over the latching lugs (section C).
4. Pull the plug out of the strain relief housing (section D).
Connecting the 24 V power supply 6:Fig.28: Remove the strain relief housing
You have dismantled the strain relief housing.