3-21
3 Part Names and Functions
CP1E CPU Unit Hardware User’s Manual(W479)
3-1 CPU Units
3
3-1-4 Optional Serial Communications Port for N/NA(S)-type CPU Units
z RS-485 Terminal Block
z DIP switch for terminating resistance settings
z RS-422A/485 Terminal Block
Built-in RS-485 Port (2-wire) for N30/40/60S1 CPU Units
Setting
ON ON (both ends) Terminating resistance selection
Resistance value: 220Ω typical
OFF OFF
CP1W-CIF11 or CP1W-CIF12 RS-422A/485 Option Board
DIP switch
ON
A- B+ FG
Front Rear
Communications
status indicator
COMM
RDA- RDB+ SDA- SDB+ FG
RS-232C connector
CPU Unit connector
DIP switch for operation
settings
RDB+
RDA-
SDA-
SDB+
FG
Tighten screws on the terminal
block to 0.28 N
.
m.
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