Technical Data; Technology - Beckhoff CU2508 Documentation

2.2

Technical data

Technical data
Operating voltage
Number of Ethernet ports
Ethernet interface
Cable length
Diagnosis
Protocols
TwinCAT support
Electrical isolation
Weight
permissible ambient temperature
range during operation
permissible ambient temperature
range during storage
permissible relative humidity
Dimensions [} 23] (W x H x D)
Mounting [} 24]
Vibration/shock resistance
EMC immunity/emission
Protection class
Installation position
Approval
2.3

Technology

Introduction
As a port multiplier that is as transparent as possible, the CU2508 extends one Gbit Ethernet port on the
controller to 8 FastEthernet ports in the field. It transports IEEE802.3 conformant Ethernet frames with
arbitrary contents.
Each port of the CU2508 sends and receives FastEthernet frames (100 Mbit, 100BASE-TX) over up to 100
m of copper cable/RJ45. The CU2508 does not generate or process the contents of any frames itself;
instead, it exclusively forwards frames sent to it by a special software driver to the field selectively via its 8
ports or forwards frames received from the field to the driver. The highly precise time information regarding
when the frames are sent or received is thereby optional.
To this end, the CU2508 has at its disposal
• the Uplink Gbit Master Port (X9) to the driver in the controller, which needs a Gbit connection at the
opposite end
• 8 equivalent 10/100 Mbit downlink ports (X1-X8) for the real-time traffic to the connected field devices
A CU2508 system thus consists of the CU2508 device and the CU2508 driver, e.g. integrated in TwinCAT
2.11R2 or TwinCAT 3.
Real-time Ethernet port multiplier
CU2508
24 (18...30) V , 250 mA, 3-pin connector (+, -, PE)
DC
8 x 100 Mbit/s (100BASE-TX) and 1 x 1 Gbit/s (1000BASE-T, Uplink)
RJ 45
up to 100 m, min. CAT5 twisted-pair, shielded
via LED, software
depends on used CU2508 driver
TwinCAT: Ethernet TCP/IP; real-time protocols: EtherCAT,
PROFINET, RT Ethernet etc.
TwinCAT from version 2.11R2 (build 2028)
Operating systems XP/7/WES and CE/WEC
1,500 V
approx. 500 g
0°C ... + 55°C
-25°C ... + 85°C
95 %, no condensation
approx. 146 mm x 100 mm x 30 mm
on 35 mm mounting rail conforms to EN 60715
conforms to EN 60068-2-6 / EN 60068-2-27
conforms to EN 61000-6-2 / EN 61000-6-4
IP20
variable
CE
cULus [} 28]
Version: 2.6
Product overview
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