Salter Brecknell 6700U Series (USB) - Manual (Page 9)

67XXU USB/Serial Scale Service Manual 9
2.1 Connections
There are connectors located on the side of the scale for the power supply, USB port,
RS-232 serial port and display which is used for mounting the display remotely on a
wall or a desk.
Figure 2.2 View of Scale Connectors
2.1.1 Display
The indicator display can be removed from the scale and mounted on a wall or desk.
Refer to section
2.4 for details on mounting.
2.1.2 Power Supply
The 67XXU comes with an external AC to DC power adapter. Simply plug the AC
adapter into the DC6V power jack on the scale and then plug into a standard wall outlet.
2.1.3 USB Port (Com 1)
The USB connector is used as a virtual RS-232 port and USB power supply.
2.1.4 RS-232 Serial Port (Com 2)
The 67XXU comes standard with one full Bi-directional RS-232 serial port designed for
connection to either a PC or a serial printer.
l
Pin 2 = transmit
l
Pin 3 = receive
IMPORTANT: Make sure that the AC voltage and polarity appearing at the wall
outlet matches the input voltage as well as the polarity marked on the AC
adapter.