EN-38
PXP Series Balance
9.4.2 RS232 (DB9)
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Diagram
Type
Description
Interface type
Voltage interface conforming to EIA
RS-232C/DIN 66020 (CCITT
V24/V.28)
Max. cable length
15 m
Signal level
Output:
+5 V ... +15 V (RL = 3
–
7kΩ)
-5 V ... -15 V (RL = 3 -
7 kΩ)
Input:
+3 V ... +25 V
-3 V ... -25 V
Connector
Sub-D, 9-pole, female
Operating mode
Full duplex
Transmission mode
Bit-serial, asynchronous
Transmission code
ASCII
Baud rates
1200, 2400, 4800, 9600, 19200,
38400 (firmware selectable)
Bits / parity
7-bit/even, 7-bit/odd, 7-bit/none,
8-bit/none (firmware selectable)
Stop bits
Stop bit 1, 2
Handshake
None, XON/XOFF, RTS/CTS
(selectable)
End-of-line
Not selectable
USB Interface
The Ohaus USB Interface is a unique solution to the problem of connecting a balance to a computer using a
Universal Serial Bus (USB). USB devices are categorized into classes such as disk drives, digital cameras, printers,
etc. Balances do not have a commonly used class so the Ohaus USB interface uses a generic interface based on
the RS232 serial standard.
Data sent from the balance to a computer is in USB format. The USB data is directed to a
virtual port
.
This port
then appears as an RS232 port to the application program.
When sending a command from a computer to the balance, the application program sends a command to the
virtual port
as if it were an RS232 port. The computer then directs the command from the
virtual port
to the
computers USB connector where the balance is connected. The port receives the USB signal and reacts to the
command.
System Requirements
x
PC running Windows 98
®
, Windows 98SE
®
, Windows ME
®
, Windows 2000
®
, Windows XP
®
, Windows 7
®
or
Windows 8
®
(32-bit) or Windows 10
®
.
x
Available USB port (Type A, 4-pin, female)
