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3. SPECIFICATIONS
MELSEC-A
3.2.2
RS-232C interface specifications
Table 3.3 explains the RS-232C interface specifications of the AD57G.
Table 3.3 RS-232C Interface Specifications
Item
Specifications
Transmission method
Conforms to EIA RS-232C.
Synchronous method
Asynchronous method
USART mode setting
Automatic setting
(9600BPS, even parity, data bit length 8, and stop bit length 1)
Maximum cable length
30
m
Connectors used
25
pin
0 sub (female) screw stop type
Made
by
DOK: equivalent to 17LE-13250-22-D2AC
External view
Pin
Signal
Signal directions
General
numbers
abbreviations
Inside -
Outside
~
1
FG
Frame ground
'.
SD
Send data
2
•
0
14
2
~
3
•
0
15
,
.
o
16
3
RD
-
Receive data
5
•
0
17
Connector
6
•
0
ts
4
RTS
-
Request to send
specifications
7
•
0
19
8
0
•
20
9
0
0
21
5
CTS
-
Send enabled
10
0
0
22
"0
0
23
Data equipment
6
DSR
-
12
0
o "
ready
"0
0
25
7
SG
Signal ground
~
20
DTR
Terminal ready
-
notification
AD57G
External device
1
FG
r,
~ T'o
FG
2
SD
-
I
11--
SD
3
RD
I
I T
RD
Connections
4
RS
JI I
[ I[
RS
5
CS
CS
6
DSR
~
U--
DSR
7
SG
--tJ__
G--
SG
20
DTR
DTR
3-3
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