Eaton Pow-R-Line SPX0361126 - Incorrect “T” and “Star” Topologies

www.eaton.com IM02601001E 5-3
Serial Communication Installation
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Twisted pair, shielded (SH) cable
R
T
A
(+) B(-) SH
R
T
A
(+) B(-) SH
A
(+) B(-) SH
A
(+) B(-) SH
Slave device 1
Slave device 2
Last Slave device N Master device
Earth Connection, preferably at
single location
Twisted pair, shielded (SH) cable Twisted pair, shielded (SH) cable
Long stub results “T” connection that can cause
interference problem!
Twisted pair, shielded (SH) cable
A
(+) B(-) SH
Twisted pair, shielded (SH) cable
Twisted pair, shielded (SH) cable Twisted pair, shielded (SH) cable
A
(+) B(-) SH
A
(+)B(-) SH
A
(+) B(-) SH
A
(+) B(-) SH
Master device
Slave device 1 Slave device 2
Slave device 3 Slave device 4
“STAR” connection can cause interference
problem!