PC-150 Operation Manual
3
Installation and Wiring
The PC-150 back panel comes equipped
with a female DSUB-9 connector for the
RS-232 serial port, a jack for DC power
input, a calibration switch and an
ON/OFF rocker switch. To install the
scale, simply plug the enclosed AC Wall
Adapter into the scale’s DC power jack
first, then into an AC outlet (115 VAC
only). Finally, turn the rocker switch to the
ON (“1”) position. The scale is now ready
for use.
ON/OFF
SWITCH
DC POWER
JACK
RS-232
PORT
ID TAG
CALIBRATION
SWITCH COVER
PC-150 Back Panel
The female 9-Pin RS-232
connector is used to interface
to a PC. Shown at right are
the pin assignments for the
connector.
Pin No.
Pin Name
2
Receive Data
3
Transmit Data
5
Signal Ground
2
3
5
9-pin RS-232 connector (female)
Shown at right is the suggested cable diagram
for direct connection to a PC. Or, you can order
the optional pre-wired NMC-1 Null Modem Ca-
ble
TO SCALE
TO PC
2 RXD
RXD 2
TXD 3
S. GND 5
3 TXD
5 S. GND
6 DSR
4 DTR
8 CTS
DSUB9
DSUB9
FIGURE 1. Cable Diagram for Scale to IBM PC
