4.5.3
connecting
the
Rs-422
-on
When connecting to an RS422 connector, the fdlowing precautions must
be
taken. Connection examples are given
in
the diagram below.
(1)
Precautions during connections
(a)
To
transmit
FG
end
SG
signals of the
AJ71
C24 to an external device,
perform connections conforming to the specifications
of
the external
device.
(b)
The
following example
uses
a
1:l
connection ratio between a com-
puter
and
an
AJ71
C24.
Section
4.5.4
explains l:n
(,,n"
is
up to 32) and m:n connection ratios
(total of
"m"
and "nu is a maximum
of
32) between computers and
AJ71
C24 modules.
(2) Example
---
RDA
Receive data
RDB Receive data
SDA Send data
SDB
Send data
RSA
Requost to send
RSB
bqUO8t to aend
CSA Clear to send
CSB
Char to sond
-x---xz
-
L.
r
1
I
b..
c
'1:
Section 3.2.3 givos the signal assignment
of
the RS-422 terminal
on the W71C24.
P
L-
F
c-
4-
13
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