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USER'S MANUAL FA-405
6. APPENDIX: CONNECTING VIA RS-232 INTERFACE
6.1 RS-232 Interface Capabilities
The RS232 interface provides a point-to-point connection between two items of
equipment such as a computer and the power supply. There are some parameters you
need to set on the both sides. Once you have set these parameters, you can control the
power supply through the RS232 interface.
•
Baud rate: 2400 baud.
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Parity bit: none.
•
Data bit: 8 bits.
•
Stop bit: 1 stop bit.
•
Data flow control: none.
6.2 Notes for RS-232 Installation
The power supply is a DTE device with a 9-pin D-type shell RS-232 connector
located on the rear panel. Fig. 3 shows the equipment of 9-pin connector (Male) with its
pin number assignments. Fig. 4 shows the wiring configuration for DB9 to DB9. When
the programmable power supply is set up with a RS-232 interface, please check the
following points:
•
Do not connect the output line of one DTE device to the output line of the other.
•
Many devices require a constant high signal on one or more input pins.
•
Ensure that the signal ground of the equipment is connected to the signal
ground of the external device.
•
Ensure that the chassis ground of the equipment is connected to the chassis
ground of the external device.
•
Do not use more than 15m of cable to connect devices to a PC.
•
Ensure the same baud rate is used on the device as the one used on PC
terminal.
•
Ensure the connector for the both side of cable and the internal connected line
are met the demand of the instrument.
12/2003
Page 17
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