Rosslare AC-225? AC-225IP? AC-225U Guia do Utilizador descarregar pdf (Página 36)

Communications

Daisy Chaining

Daisy chaining allows many panels to connect to the

computer along a single serial line.

The first panel is connected directly to the computer and a

second panel connects to the first panel. Additional panels

connect in the same way, one after another.

AC-225 Hardware Installation and User Guide Page 35

C-225 #1

RS-485

C-225 #2

RS-485

C-225 #3

RS-485

L2 L1

(-)

L2 L1

(-)

L2 L1

(-)

Figure 18: Daisy Chaining

At each end of the data line, both where the panel connects

to the computer and on the last panel in the network, a

termination resistor of 120Ω may be required. Apply the resistor

across the L1 and L2 connections.

These termination resistors are especially important in long

cable runs.

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Rosslare AC-225? AC-225IP? AC-225U Guia do Utilizador Página 36