Communications – Salter Brecknell 7620U User Manual
Page 21
Model 7620U Bench Scale User’s Manual
21
Communications
Interface Cable
NCI STD
Communications
Protocol
The NCI 7620U scale comes factory configured
as a serial RS-232 interface device. There is one
9-pin DE type female connector accessible at the
rear of the unit. The functional pinout of the scale
connector and a standard host PC is as follows:
DE-9 Female Scale
DE-9 Male Host
Pin Name Direction
Pin Name Direction
1.
JMP 1 -
1.
DCD
IN
2.
TXD
OUT
2.
RXD
IN
3.
RXD
IN
3.
TXD
OUT
4.
JMP 1 -
4.
DTR
OUT
5.
SGND -
5.
GND
-
6.
JMP 1 -
6.
DSR
IN
7.
JMP 2 -
7.
RTS
OUT
8.
JMP 2 -
8.
CTS
IN
9.
NC
-
9.
RI
IN
The scale uses a DE-9 connector. This standard
is used by all NCI bench scale products.
Symbol key:
<ETX>
End of Text character (03
hexadecimal).
<LF>
Line Feed character (0A hex).
<CR>
Carriage Return character (0D hex).
<SP>
Space (20 hex).
x
Character from display including
minus sign.
hhh...
Three status bytes.
uu
Unit of measure “kg”
Jmp1 and Jmp2 pins
are connected inter-
nally on the scale PCB
connector.