Honeywell DCP301 User Manual page 49

5-wire system RS-485 mutual connection
Handling Precautions
Be sure to connect SG terminals each
others.
Failure to do so might cause unstable
communications.
Provide terminating resistor of 150
Grounding of the shielded FG terminal should be carried out at only one end and not both ends.
Terminating resistor
Terminating resistor
Shielded cable
Master station
RDA
RDB
SDA
SDB
SG
FG
Shielded cable
Shielded cable
Terminating resistor
Terminating resistor
5%, 1/2W min. at both ends of the communications path.
Chapter 4. WIRING
Slave station DCP301
SDA
57
SDB
58
RDA
59
RDB
60
SG
61
FG
Slave station DCP301
SDA
57
SDB
58
RDA
59
RDB
60
SG
61
FG
Slave station DCP301
SDA
57
SDB
58
RDA
59
RDB
60
SG
61
FG
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