4-1
Section
Controller
54
When using the mutual interference prevention function, use a 4-conductor
shielded cable. Use two of the wires as the SYNC lines and the other two wires
as the RS-485 interface lines. Connect the shield wire to the ground terminal.
Total length: 300 m max.
SW3 pin 7 OFF
(not terminated)
Host device
terminated
SW3 pin 7 OFF
(not terminated)
SW3 pin 7 OFF
(not terminated)
SW3 pin 7 ON
(terminated)
Total length: 300 m max.
SW3 pin 7 ON
(terminated)
Host device
not
terminated
SW3 pin 7 OFF
(not terminated)
SW3 pin 7 OFF
(not terminated)
SW3 pin 7 ON
(terminated)
If you do not use the recommended cable, wire the SYNC cable parallel with the
RS-485 interface cable. To avoid noise problems, do not wire the cables sepa-
rately as shown in examples 2 and 3 below. (Typical noise sources are other
electronic devices, power lines, and AC adapters.)
Example 1
Noise
source
SYNC cable
RS-485 interface cable
Example 2
Noise
source
SYNC cable
RS-485 interface cable
Example 3
Noise
source
SYNC cable
RS-485 interface cable
Wiring Examples
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