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5-4SectionUsing Protocol Macros
74
1:1 Connections Using RS-422A/485 Ports
Signal
Pin
Serial Communications Board
RS-422A
/485 in-
terface
Device supporting
RS-422A/485
communications
(2-wire)
Serial Communications Board
Device supporting
RS-422A/485
communications
(4-wire)
Hood
Shield
D-sub, 9-pin
connector (male)
Signal
Signal
Pin
Shield
D-sub, 9-pin
connector (male)
Signal
5-V (+)
power (–)
D-sub, 9-pin
connector
(male)
NT-AL001-E Link Adapter
RS-232C
Interface
Signal
DIP Switch Settings
Pin 1: ON
Pin 2: ON
(terminating resistance)
Pin 3: OFF
Pin 4: OFF
Pin 5: OFF
Pin 6: OFF
Computer
RS-232C
D-sub, 9-pin
connector (male)
RS-422A
/485 in-
terface
Serial Communications Board
RS-422A
/485 in-
terface
Signal
Pin
Hood
RS-422A
/485 in-
terface
Hood
RS-422A
/485 in-
terface
Signal PinPin Signal
Shield
RS-422A
NC
SD
RD
RTS
CTS
5V
DSR
DTR
SG
FG
SD
RD
RTS
CTS
DSR
DTR
SG
D-sub, 9-pin
connector (male)
Terminal block
Terminating resistance ON
4-wire