Beckhoff EL6731

4.1 Architecture Description 

Within the USB-Extender-Tx (CU8800) and USB-Extender-RX (CU8850) the length of USB data 

transmission can be increased from 35 meters (1 host, 5 USB hubs and a device each connected with 5 

meters of cable) up to 61 meters. Due to the USB signal runtime, it is not possible to connect more than 

one USB hub in the chain. The following picture shows the maximal length of connection. 

4.1.1 Configuration 1 

The USB hub is connected after the extension. The maximal distance is also 56 meters: 1 meter of cable 

from USB host to the USB extension box CU8800; up to 50 meters extension cable; 5 meters from 

extension box to the USB device via the USB hub. 

4.1.2 Configuration 2 

This configuration shows a CP69xx/ CP79xx Control Panel connected to the CU8800 extension box. The 

maximal distance of extension is 51 meters: 1 meter of cable from the host computer to the CU8800 

extension box; up to 50 meters extension cable to the Control Panel. 

CU8800-0010 11 

Operation

4.2 Maintenance 

4.2.1 Cleaning 

Disconnect power supply

DANGER 

Switch off the device and all connected devices, and disconnect the device from the 

power supply. 

The device can be cleaned with a soft, damp cloth. Do not use any aggressive cleaning materials, 

thinners, scouring material or hard objects that could cause scratches. 

4.2.2 Maintenance 

The CU8800-0010 USB-Extender-Tx is maintenance-free. 

4.3 Shutting down 

4.3.1 Disposal 

Observe national electronics scrap regulations 

Note 

Observe the national electronics scrap regulations when disposing of the device. 

In order to dispose of the device, it must be removed and fully dismantled: 

• Housing components (polycarbonate, polyamide (PA6.6)) are suitable for plastic recycling 

• Metal parts can be sent for metal recycling 

• Electronic parts such as disk drives and circuit boards must be disposed of in accordance with 

national electronics scrap regulations.