ET-87P2/4/8 Series User Manual, version 1.0.1 Page: 9
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Communication
Daisy-Chain Ethernet topology
The ET-87Pn has a built-in two-port Ethernet switch to implement daisy-chain
topology. The cabling is much easier and total costs of cable and switch are
significantly reduced.
Tips & Warnings
In a daisy chain connection, each master can connect up to 10
ET-87Pn slaves simultaneously. If the number of ET-87Pn salve is
more than 10, it is recommended to increase a switch.