Eaton XV100, Manual

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5 Installation
5.3 Interfaces
48
Touch display XV-102 10/2020 MN04802004Z-EN Eaton.com
Wiring Screened twisted-pair cables must be used.
Tab. 24 Cable specifications
RS485-topology

A bus segment can interconnect up to 32 slaves.

Several bus segments can be connected using repeaters (bi-directional amplifiers). Refer to the
documentation of the repeater manufacturer for more specific details.

A bus segment must be provided with cable termination (120

) at both ends. These terminals
must be connected in the connector directly between pin 3 and 7.
Cable specifications
Rated surge impedance 120

Permissible surge impedance 108…132

Max. cable length 1200 m
Possible baud rates 9600 Bit/s
19200 Bit/s
38400 Bit/s
57600 Bit/s
115200 bit/s

When preparing the cables, ensure that there is a low-resistance connection between
the cable screen and the connector casing (

Chapter 5.3.2,

28).

The use of repeaters enables the maximum cable length to be increased. Refer to the
documentation of the repeater manufacturer for more specific details.


The bus segment must be terminated at both ends.

No more than two terminations must be provided for each bus segment.

Operation without correct cable termination can cause transfer errors.
Fig.. 27 Bus segment with four nodes
1
2
3
6
7
5
4
8
9
120
1
2
3
6
7
5
4
8
9
120
1
2
3
6
7
5
4
8
9
1
2
3
6
7
5
4
8
9
GND
A
B
GND
A
B
GND
A
B
GND
A
B
GND
A
B
GND
A
B