Product specifications

Page 92 AD-4402
RS-485 2 Wire Connections
Settings RS-485 [03 f-11] [2]
Settings of Parameters
Refer to "10.4. Parameter List" of the function list.
Timing Chart
Keep the delay time above 0.5 ms between the last response and the next command.
Set response time (tr). [03 f- 9] < tr < [03 f- 9] + 50 ms
Use a long delay time, when there is noise.
Use 4 ms or more from the output finish to receiveing the next command
Hi-Z: Hi impedance
A
D-4402
No.1
A
B
FG
Host computer
Terminator resistor
100 ~ 120Ω 1/2W
The host computer may include
the terminator resistor.
The host computer may have
inverse polarity terminals.
Use twisted-pair wire.
Use shield cable, if it is needed.
2 (SDA) and 3 (SDB)
connect nothing.
TERMINATOR
ON
OFF
OFFOFF
OFF
A
D-4402
No.32
TERMINATOR
ON
ONON
ON
OFF
Connect a terminator
resistor at the indicator that
is the longest distance from
the host computer.
Turn on
terminator switch
RD
A
RDB
SG
FG
SDA
SDB
RD
A
RDB
SG
FG
SDA
SDB
AD-4402
Address 1
Host computer
@01RW
C
R
L
F
@01ST,NT,+0123.45kg
C
R
L
F
@02RW
C
R
L
F
AD-4402
Address 2
Hi-Z
@02ST,NT,+0123.45kg
C
R
L
F
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Waiting time until next
command: td > 4 ms
Waiting time
f
rom command to
response: tr. Set tr at [
03 f- 9].
Hi-Z
Waiting time
f
rom
command to response: tr.
Set tr at [
03 f- 9].