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4-19
Chapter 4. WIRING
4 - 13
Connecting for Communications
Some controller models support the RS-485 communications interface. Select the RS-485 communications models
by selecting the required model No.
The DCP32 operates as a slave station in a multidrop configuration. In this case, connect as follows.
■
RS-485 interface
Add-on terminal base
59
60
61
SDA
SDB
RDA
RDB
SG
57
58
Handling Precautions
• Make sure that different addresses are set for each slave station.
• Provide terminators (total of 4 in the case of a 5-lead connection) on both
ends of the communications path.
Use terminators having a resistance of 150
Ω
±5%, 1/2 W min.
• In the case of a 3-lead connection, short-circuit terminals
and
,
and and on
the
DCP32.
• Do not short-circuit
and
, or
and
terminals.
Doing so might damage the DCP32.
60
59
58
57
60
58
59
57