Product specifications

Page 77
9.2.2.
9.2.2.9.2.2.
9.2.2. Connection
ConnectionConnection
Connection
Terminals Interface Circuit
Multiplue Drop Connection for Command Mode
SD
A
SDB
SG
FG
Unit 1
AD-4404
Address 1
SD
A
SDB
SG
FG
Host computer
SD
A
SDB
SG
FG
Unit 2
AD-4404
Address 2
SD
A
SDB
SG
FG
Unit 32
AD-4404
Address 32
Terminator resistor
100 ~ 120Ω 1/2W
Terminator resistor
100 ~ 120Ω 1/2W
Connect a terminator resistor at the
indicator that is farthest from the host
computer.
The host computer may include
the terminator resistor.
The host computer may have
inverse polarity terminals.
Use twisted-pair wire.
Use shielded cable, if it is needed.
SDA
RS-485
A
B
SG
C.LOOP
FG
SDB
SG
Shield
A
D-4404 Inside
A
B
SG
RE/DE