Salter Brecknell 7620U - 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:
End of Text character (03
hexadecimal).
Line Feed character (0A hex).
Carriage Return character (0D hex).
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.