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User Manual
A9000
AC Power Source
6. Remote operation
6.1 Introduction
DME-A902ABT SERIES can be remotely controlled by GPIB or RS-232. GPIB interface
is an 8-bit parallel data bus cooperate control line to manage communication. RS-232
transmits data seriously so communication speed is slower.
If transmission speed is faster than data processing speed of micro-processor, micro-
processor will neglect new received command when there is command under processing.
6.1.1 Set GPIB address and RS-232 Parameters
GPIB and RS-232 parameters can be set at CONFIG page. Default address for GPIB is 30,
baud rate for RS232 is 9600, and Even/odd parity check for RS232 is NONE.
6.1.2 RS-232 pin definition
RS-232 interface uses RXD and TXD signals only. RS-232 implements 9PIN D-SUB type
female connector, pin definition listed as below.
pin
1
2
3
4
5
6
7
8
9
6.1.3 GPIB Interface
GPIB function
Sender/
receiver
Service request
Remote/local
control
76
│ www.deltaww.com
in/out
NC
OUTPUT
INPUT
NC
GND
NC
NC
NC
NC
explanation
GPIB bus may transmit or receive
data by this function. Use following
commands to read information.
AC source will pull SRQ pin to low
voltage when interfaced instruments
have service request.
AC source can be controlled by front
panel locally or GPIB remotely.
Press Unlock to switch from remote
control back to local control, other
keys are inactive during remote
control.
definition
NC
TXD
RXD
NC
GND
NC
NC
NC
NC
Interface function
AH1，SH1，T6，L4
SR1
RL1
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