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4-18
Chapter 4. WIRING
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5-lead RS-485 mutual connection
Handling Precautions
• Be sure to connect SG termi-
nals each other.
Failure to do so might cause
unstable communications.
Connect terminating resistors (150 Ω ±5 %, 1/2 W min.) to both ends of the transmis-
sion line.
Grounding of the shielded FG terminal should be carried out at only one end and not
both ends.
57
58
59
60
61
SDA
SDB
RDA
RDB
SG
FG
57
58
59
60
61
SDA
SDB
RDA
RDB
RDA
RDB
SDA
SDB
SG
FG
SG
FG
57
58
59
60
61
SDA
SDB
RDA
RDB
SG
FG
Terminating resistor
Terminating resistor
Terminating resistor
Terminating resistor
Slave station DCP31
Shielded cable
Shielded cable
Shielded cable
Master station
Slave station DCP31
Slave station DCP31