Salter Brecknell 7840 - Manual (Page 31)

Model 7800 Family Weight Classifiers User’s Manual 31
The NCI 7800 family scales come factory config-
ured 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 this connector is compatible with a
standard PC with a pass through cable.
Serial commands will be responded to only when
the scale is in the normal operating mode and
Switch 1 on the main board is in the CLOSED
position.
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. SG - 5. GRD -
6. JMP 1 - 6. DSR IN
7. JMP 2 - 7. RTS OUT
8. JMP 2 - 8. CTS IN
9. NC - 9. RI IN
Communication
Interface Cable
Specifications
Communications Enabled
JMP 1 Pins 1, 4 and 6,
and JMP 2 Pins 7 and
8 are internally
jumpered inside the
scale.