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Appendices
99
A-4. Specifications for RS-232C Connector
RS-232 Specifications
Note
The number and specifications noted here are subject to change without
notice. The RS-232C cables are not guaranteed to match every computer
or device. Also, their lock screws may not match the connector threads on
the balance.
Pin number
Name
Function
Comment
1
FG
Frame ground
2
TXD
Data output
3
RXD
Data input
4
RTS
Internal connection with CTS
5
CTS
Internal connection with RTS
6
DSR
Handshake reception
7
SG
Signal ground
8
NC
Open
9
NC
Open
10
NC
Open
11
NC
Open
12
NC
Open
13
NC
Open
14
NC
Open
15
NC
Open
16
NC
Open
17
NC
Open
18
NC
Open
19
NC
Open
20
DTR
Handshake (transmission)
21
NC
Open
22
NC
Open
23
NC
Open
24
NC
Open
25
NC
Open