Scientech S200 Vector - Manual (Page 25)

If your instrument has both the RS232 and the IEEE488 interfaces installed, only one may be active at any
given time. You can change the active interface from the front panel or from the remote interface itself.
If the remote interface is the RS232 interface, and you wish to change it to the IEEE488 interface, you may
enter the command "io ieee" from the RS232 interface. This command will change the instrument's saved
interface choice. Then, the next time the instrument is powered up, or the next time a "*rcl 0" or *rst
command is executed, the IEEE488 interface will become the active interface. Similarly, if the active
interface is the IEEE488 interface, you may change it by entering the command "io rs232" followed by a
power cycle, or the commands "*rcl 0" or *rst.
RS232 INTERFACE
The RS-232 connector is a 9 pin D subminiature connector located on the instrument rear panel. The pinout
and pin descriptions are shown below:
1. UNUSED
2. DATA IN (RXD)
3. DATA OUT (TXD)
4. DTR (IS GENERATED)
5. GROUND
6. DSR (IS IGNORED )
7. RTS (IS MARKING)
8. CTS (IS EVALUATED IF REQUESTED)
9. UNUSED
This interface does not strictly adhere to the official RS232 standard. However, it emulates what has become
commonplace in the microcomputer industry. The instrument will evaluate CTS if the CTS handshake
method is selected from the front panel, or by a remote command.
RS232 SPECIFICATIONS
Type: EIA-RS232C
Method: Half-duplex, Asynchronous Transmission, Bi-directional
Format: 300, 600, 1200, 2400, 4800, 9600 baud rate selectable
Data bits: 7
Parity bit: Even Odd or None
Stop bit: 1
Code: ASCII
Total number of bits: 10
RS232 FRONT PANEL CONFIGURATION
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