Minebea CSD-904-EX - Page 86

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13-3-11. Pin configuration of RS-422/485 terminals
SDA Difference output(＋)
SDB Difference output (－)
RDA Difference input (＋)
RDB Difference input (－)
TRM Cable end resistance
S.G. Signal ground
(1) Wiring of 1 to 1
● Make the short circuit between TRM terminal and RDB terminal, and connect the built-in cable end resistance at the end of
the host looking from the host(personal computer, sequencer, and so on).
● For the connection, we recommend to apply twisted pair wires.
● The external control input COM. (two pins) and the S.G. for RS-422/485 are common.
● Internal circuit and photo-coupler is insulated.
RDA
RDB
SDA
SDB
S.G.
SDA
SDB
RDA
RDB Adress 00
TRM.
S.G.
SDA
SDB
RDA
RDB Adress 00
TRM.
S.G.
RDA
RDB
SDA
SDB
S.G.
RS-422 Host
CSD-904-EX
CSD-904-EX RS-485 Host