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4-5
■
Connection of open collector output to digital input
The following shows a connection example when connecting to four digital input
points.
■
Connection of communication (RS-485) cable
●
3-wire system
Terminating resistor
• Do not connect any terminating resistor in the communication path.
Doing so might cause the communication failure.
• Even though any units requiring the terminating resistor in the
communication path, do not connect any terminating resistor.
Handling Precautions
• Do not connect DA and DB. Doing so might cause damage to this
unit.
• Ground the shield line to one point on one end of the cable.
• Be sure to connect SG terminals each other.
Failure to do so might cause unstable communications.
Chapter 4. WIRING
18
19
20
21
24
5V
This unit
22
23
24
22
Master station
DA
DA
DB
DB
SG
SG
SG
FG
+
–
This unit (slave station)
This unit (slave station)
Shield
Shield
23
24
IMPORTANT
Summary of Contents for SDC35
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