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4-3SectionConnections
42
1:1 Connections Using RS-422A/485 Ports
5-V (+)
power (–)
D-sub, 9-pin
connector (male)
NT-AL001-E Link Adapter
Shield
RS-232C
Interface
RS-422A
/ 485 In-
terface
Signal
Pin
DIP Switch Settings
Pin 1: ON
Pin 2: ON
(terminating resistance)
Pin 3: OFF
Pin 4: OFF
Pin 5: OFF
Pin 6: OFF
Pin
Serial Communications
Board
Computer
Terminal block
Hood
Terminating resistance ON
4-wire
SignalSignal
Pin Signal
FG
SD
RD
RTS
CTS
DSR
DTR
SG
NC
SD
RD
RTS
CTS
5V
DSR
DTR
SG