Azbil DCP31 - 4 - 13 Connecting for Communications

SomecontrollermodelssupporttheRS-485communicationsinterface.SelecttheRS-485com-
municationsmodelsbyselectedtherequiredcatalogNo.
Connectasfollows.
Handling Precautions
The DCP31 operates as a slave station.

RS-485 interface
Handling Precautions
• Multi-drop connection of slave stations is possible.
• Make sure that different addresses are set for each slave station.
• Connect terminating resistors (a total of 4 in the case of a 5-lead
connection) to both ends of the transmission line.
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
or and on the DCP31.
• Do not short-circuit the RDA and RDB, or SDA and SDB terminals.
Doing so might damage the DCP31.
57
58
59
60
61
SDA
SDB
RDA
RDB
SG
Add-on terminal base
4-17
Chapter 4. WIRING
4 - 13 Connecting for Communications