59Remote Control
10. RemoteControl
This chapter provides the following information to remotely control the AT281x via
the RS-232C or USB interface.
About RS-232C
About USB Interface
Select Baud Rate.
About SCPI
AT281x can use the RS-232 interface or USB interface to communicate with the
computer to complete all the instrument functions.
10.1 AboutRS‐232C
You can connect a controller (i.e. PC and PLC) to the RS-232 interface using
Applent RS-232 DB-9 cable. The serial port uses the transmit (TXD), receive (RXD) and
signal ground (GND) lines of the RS-232 standard. It does not use the hardware
handshaking lines CTS and RTS.
NOTE:
JUST ONLY Use an Applent (not null modem) DB-9 cable.
Cable length should not exceed 2m.
Figure10‐1 TheRS‐232connectorintherealpanel
Table10‐1 RS‐232connectorpinout
NAME DB-25 DB-9 NOTE
DCD 8 1 Not Connection
RXD 3 2 Transmit data
TXD 2 3 Receive date
DTR 20 4 Not Connection
GND 7 5 Ground
DSR 6 6 Not Connection
RTS 4 7 Not Connection
CTS 5 8 Not Connection
Make sure the controller you connect to AT281x also uses these settings.
The RS-232 interface transfers data using:
8 data bits,
1 stop bit,
And no parity.
10.2 AboutUSB‐SerialInterface(Option)
The USB-Serial Interface allows you to connect AT281x to a USB port on your PC.
NOTE:
Please install the USB-Serial driver before using USB-Serial Interface.
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