Scientech S9000 - Manual (Page 12)

RS-232 INTERFACE
NOTE: Scientech balances are DTE (computer) devices. If communicating to another DTE device (ie computer), a
special Scientech RS232 cable (PN10697) is required. If you are communicating to a DCE device (printer), a modem cable
is required. Scientech offers an optional modem cable (PN10170) for your convenience.
Your balance is equipped with a bi-directional RS-232 compatible interface. The interface is uni-directional (balance send only)
when the local control is set to ON. To enable the bi-directional interface, set the local control to OFF (see the following RS-232
Front Panel Configuration section). The RS-232 connector is a 9 pin D subminiature connector located on the balance rear
panel. The pinout and pin descriptions are shown in Figure 7.
Figure 7 Connector Pinout
NOTE: The Ext reset function is disabled in all balances when they are delivered. To enable the feature pin 1 of the
internal dipswitch must be closed. Please contact customer service with any questions.
The balance will not output any information under any circumstances unless pin 8 (CTS) is held in an ON state (+3 to +15
VDC). Interfaces not utilizing the CTS handshake may tie pin 8 to pin 7 or pin 8 to pin 4 to defeat it.
This interface does not strictly adhere to the official RS-232 standard. However, it emulates what has become commonplace in
the microcomputer industry.
RS-232 SPECIFICATIONS
Type EIA-RS-232C, DTE
Method Half-duplex, Asynchronous Transmission, Bi-directional
Format 300, 600, 1200, 2400, 4800, 9600 and 19,200 baud rate selectable (default is 9600)
Data bit: 7 Parity bit: Even, odd or none (default is none)
Stop bit: 1 Code: ASCII
RS-232 FRONT PANEL CONFIGURATION
Before using the RS-232 feature of your balance, it is necessary to configure the interface properly for your application. The RS-
232 Configuration Mode allows you to set baud rate, front panel control, software protocol, parity, auto send, continuous send,
and display blanking. The balance is configured with defaults at the factory. The default modes are shown in parenthesis below.
It is not necessary to follow the entire configuration procedure if only one parameter is to be changed. Follow Steps 1 and 2, then
use the MODE switch to select the parameter to be changed, skipping the others. Select the desired setting using the SEND
switch, save the setting using the ZERO switch, then turn the balance off and then on again with the ON/OFF switch.
To enter the RS-232 configuration mode via the front panel, proceed as follows:
1. Turn the balance off using the ON/OFF switch. Display blanks.
2. Hold the SEND switch down while turning the
balance on using the ON/OFF switch.
OK and the current baud rate, br300, br600, br1200, br2400, br4800,
br9600, or br19,200 is displayed.
3. BAUD RATE SELECTION (9600 is default).
Press the SEND switch until the desired
baud rate is displayed. Then press the
ZERO switch.
OK SAVEd is displayed followed by OK and the chosen baud rate.
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