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CU8860-0000 Beckhoff

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Internal Product Review

The CU8860-0000 is a Beckhoff CU EtherCAT junction with 24 V DC input and IP20 protection. USB 1.1 support and a Type A downstream port make this unit a practical choice for straightforward device integration in automation cabinets. Low 1.15 W power consumption stands out as a strong advantage for efficient system design.

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Product Description:

The CU8860-0000 is an EtherCAT junction module produced by Beckhoff within the CU EtherCAT Junctions series. Designed as a compact infrastructure component for industrial automation networks, the CU8860-0000 combines one RJ-45 field port, USB connectivity, and a DVI interface so local operator panels, service PCs, or peripheral sensors can be tied into an EtherCAT segment without additional switches or separate interface adapters. The unit’s role is to aggregate signals and power for small terminal groups while maintaining deterministic EtherCAT timing in compact automation stations.

Power for the junction is supplied through a nominal 24 V DC logic rail, and the electronics draw only 1.15 W, which helps in cabinets with limited available power. The housing carries an IP20 protection class, indicating finger-safe terminals but no sealing against liquids, which suits installation inside control enclosures. The single RJ-45 channel accepts EtherCAT lines up to 50 m long, allowing flexible panel placement. USB servicing follows the Full-speed profile of 12 Mbit/s, and the board limits downstream current to 100 mA when no auxiliary power is present or to 500 mA whenever an external 24 V auxiliary feed is wired.

In addition to the field port, the module offers one downstream USB socket that conforms to the 1.5 Mbit/s low-speed mode for slower human-interface devices as well as the USB 1.1 signaling standard. The connector is physically a Type A receptacle, simplifying the use of off-the-shelf cables up to the host limit of 1 m, while devices attached to the junction may extend their own leads to 5 m. A digital video loop-through on the front panel uses a DVI-D interface so thin-client displays can share the same junction without disturbing bus traffic. This arrangement allows display and peripheral connections to be added in compact control enclosures without affecting real-time EtherCAT communication on the connected segment.

Device Usb Length
5 m max
Dvi Port Type
DVI-D
Host Usb Length
1 m max
Input Voltage
24 V DC
Power consumption
1.15 W
Protection Class
IP20
Rj45 Cable Length
50 m max
Rj45 Ports
1
Usb Current No Aux
100 mA max
Usb Current With Aux
500 mA max
Usb Downstream Ports
1
Usb Full-speed
12 Mbit/s
Usb Low-speed
1.5 Mbit/s
Usb Port Type
Type A
Usb Standard
USB 1.1

Frequently Asked Questions about CU8860-0000:

Q: What input voltage does the CU8860-0000 EtherCAT Junction require?

A: The CU8860-0000 operates with an input voltage of 24 V DC.

Q: How many RJ45 ports does the CU8860-0000 have, and what is the maximum cable length supported?

A: The CU8860-0000 features a single RJ45 port that supports cable lengths of up to 50 meters.

Q: How many USB downstream ports does the CU8860-0000 offer, and what type are they?

A: This model provides one downstream USB port of Type A, operating at USB 1.1 standard.

Q: What is the maximum device USB cable length supported by the CU8860-0000?

A: The CU8860-0000 supports a maximum USB cable length of 5 meters for device connections.

Q: What type of DVI port is integrated on the CU8860-0000 EtherCAT Junction?

A: The DVI port included on the CU8860-0000 is a DVI-D type for digital video connections.

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