Beckhoff CU20xx/CU22xx Industrial Unmanned Switch Manual

Product Overview

Four model positioning

All series of unmanaged industrial switches, metal shell DIN rail installation, compatible with automation equipment and office networks, automatically identify network cable type, speed, duplex mode:

CU2005: 5 × RJ45 100Mbps Switch

CU2008: 8 × RJ45 100Mbps Switch

CU2016:16 × RJ45 100Mbps Switch

CU2208: 8 × RJ45 Full Gigabit Switch

General product advantages

Metal compact shell, industrial grade anti vibration and EMC performance;

Adaptive 10/100/1000M, half/full duplex;

Automatically identify direct/cross network cables without the need for dedicated jumpers;

Dual LED real-time link and rate diagnosis for each port;

Standard 35mm DIN rail buckle installation;

24VDC wide voltage power supply, supporting reverse connection protection.

Summary of core electrical and mechanical parameters

Parameter item CU2005 CU2008 CU2208 CU2016

Number of network ports 5 8 8 16

Transmission rate 10/100M 10/100M 10/100/1000M 10/100M

Power supply 24VDC (18~30V), anti reverse spring terminal

Typical power consumption 90mA 100mA 180mA 150mA

Dimensions (W x H x D) 73 x 100 x 38 85 x 100 x 38 122 x 100 x 38 146.5 x 100 x 38

Weight 270g 340g 430g 540g

Protection level IP20 (only for use inside control cabinets)

Working temperature: 0 ℃~+55 ℃; Storage and transportation -25~+85 ℃

Humidity ≤ 95%, no condensation

The upper limit of the cable is 100m for a single twisted pair cable, and the switch has unlimited cascading

Certification CE, cULus; Anti vibration/impact compliance with EN60068, EMC meets industrial standards

Basic working principle

Storage and forwarding mechanism: Check frame CRC, discard<64 byte short frames,>1536 long frames, and erroneous packets, and only forward valid Ethernet packets;

MAC address self-learning: cache over 1000 MAC addresses per port, automatically clear idle addresses after 5 minutes of aging, and forward broadcast/multicast to all ports;

Whole machine throughput: line speed forwarding, up to 148800 frames per second;

Key limitations:

The entire system does not support PoE power supply and cannot be connected to PoE powered devices;

CU2208 hardware version 01 and above supports Jumbo Frame up to 9720 bytes, with gigabit ports available; Under full load, up to 2 ports can run macro frames simultaneously, while other CU20xx models do not support macro frames.

Installation, wiring, and indicator lights

DIN rail disassembly and assembly steps

Installation

Fixed standard 35mm DIN rail;

Hang the lower buckle of the switch on the bottom edge of the guide rail;

Tighten the device upwards, and the upper buckle will automatically lock in place;

4. Connect the power cord and network cable; Reserve 10mm installation allowance above the control cabinet guide rail.

disassemble

Unplug all network cables and power terminals;

Lift the switch body upwards;

Pull out the upper buckle and detach it from the guide rail.

Wiring specifications

24V power supply spring terminal (three pins:+24V/0V/PE)

UL compliance requirements: use isolated power supply, with a maximum front-end 4A fuse or NEC Class2 power supply; Multiple Class2 power supplies are prohibited from series/parallel connection;

PE must be reliably grounded to meet EMC and anti electric shock requirements.

RJ45 Ethernet port standard 8-core Ethernet definition, supports standard Category 5/6 twisted pair cables, automatically adapts to straight through and crossover lines.

LED status indication

Whole machine green Power light: constantly on=24V power supply is normal; Extinguish=power outage/wiring failure;

Each RJ45 port has dual indicator lights:

Lnk/Act: Constant light=link established, flashing=data transmission and reception; Extinguish=No device connection;

Speed indicator: CU20xx constantly on=100M; CU2208 constantly on=1000M, off=10M.

UL Compliance Requirements

Only compatible with the complete EtherCAT system certified by Beifu UL;

RJ45 network port cannot access telecommunications external lines;

Power supply limitation: The isolated circuit is equipped with 4A fuses or Class2 power supplies, and multiple Class2 power supplies are prohibited from being connected in series or parallel;

The certification standard UL508 only evaluates fire and electric shock risks.