Chapter 5 Remote Control; Rs232C Interface Introduction; Rs232C Connection - ADInstruments AD2817C Operation Manual

AD2817C Operation Manual

Chapter 5 Remote Control

AD2817C has the RS232C serial interface and the parallel GPIB (optional) interface. Both
interfaces can be used to remotely control AD2817C, but they can not be used at the same
time. The two interfaces share the same program commands, but they have different
hardware configurations and different communication protocols. This chapter provides the
information about the two interfaces and how to use the interfaces.

5.1 RS232C Interface Introduction

The RS232C interface can be used to remotely control the AD2817C, and it also can be
used to control the DC current bias sources manufactured by our company such as
TH1773/TH1775 DC current bias source. All operations from the front panel can be
performed by a computer via the serial interface.

5.1.1 RS232C connection

RS232C Standard now is widely used as the serial communication standard. RS232 stands
for Recommend Standard number 232 and C is the latest revision of the standard. The
serial ports on most instruments use a subset of the RS-232C standard. The full RS-232C
standard specifies a 25-pin "D" connector of which 22 pins are used. Most of these pins are
not needed for normal serial communications, and the common RS232 signals are listed as
follows.
Function
Request To Send
Clear To Send
Data Set Ready
Data Carrier Detect
Data Terminal Ready
Transmitted Data
Received Data
Signal Ground
Common
AD2817C only uses the smallest subset of the RS232C standard, the signal are listed as
25 Pin Connector
Code
Pin Number
RTS 4
CTS 5
DSR 6
DCD 8
DTR 20
TXD 3
RXD 2
GND 7
41
9 Pin Connector
Pin Number
7
8
6
1
4
3
2
5