4-5
■ Connection of open collector output to digital input
■ Connection of (RS-485) communication cable
● 3-wire system
• Do not connect any terminating resistor to both ends of the
communication path. Doing so might cause the communication to
fail.
• Even though any units requiring the terminating resistor exist 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 side of the cable.
• Be sure to connect SG terminals each other.
Failure to do so might cause unstable communications.
Important
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