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12. RS-232C SERIAL INTERFACE / EXTERNAL INPUT
RS-232C
The balance is a DCE device. Connect the balance to a personal computer (DTE), using a straight
through cable or a modem cable.
Transmission system
Transmission form
Data format
Pin connections
Pin No.
1
2
3
4
5
6
7
18
19
8 – 25 (Excluding 18 and 19)
Note
The signal names for the RS-232C are the same as those for the DTE side except TXD and
RXD.
Circuits
:
EIA RS-232C
:
Asynchronous, bi-directional, half duplex
:
Baud rate
:
600, 1200, 2400, 4800, 9600 bps
Data bits
:
7 or 8 bits
Parity
:
Even, Odd (Data bits 7 bits)
None
Stop bit
:
1 bit
Code
:
ASCII
Signal
Direction
name
FG
RXD
Input
TXD
Output
RTS
Input
CTS
Output
DSR
Output
SG
PRINT
Input
RE-ZERO
Input
-
47
(Data bits 8 bits)
Description
-
Frame ground
Receive data
Transmit data
Ready to send
Clear to send
Data set ready
-
Signal ground
Same as the PRINT key
Same as the RE-ZERO key
-
Not connected
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