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11.2 Connecting the Interface Cable
Table of RS-232 Standard Signals and their JIS and CCITT Abbreviations
11-4
Pin No.
RS-232
(25-pin connector)
AA(GND)
1
AB(GND)
7
BA(TXD)
2
BB(RXD)
3
CA(RTS)
4
CB(CTS)
5
CC(DSR)
6
CD(DTR)
20
CE(RI)
22
CF(DCD)
8
CG(-)
21
CH/CI(-)
23
DA/DB(TXC)
24/15
DD(RXC)
17
SBA(-)
14
SBB(-)
16
SCA(-)
19
SCB(-)
13
SCF(-)
12
Circles indicate pins used for the serial interface of this instrument
Abbreviations
JIS
CCITT
101
FG
Protective ground
102
SG
Signal ground
103
SD
Transmitted data
104
RD
Received data
105
RS
Request to send
106
CS
Clear to send
107
DR
Data set ready
108/2
ER
Data terminal ready
125
CI
Ring indicator
109
CD
Data channel received carrier detect
SQD
110
Data signal quality detect
111
SRS
Data signal rate select
113/114
ST1/ST2
Transmitter signal element timing
115
RT
Receiver signal element timing
118
BSD
Secondary transmitted data
119
BRD
Secondary received data
120
BRS
Secondary request to send
BCS
121
Secondary clear to send
122
BCD
Secondary received carrier detect
Name
IM 760401-01E
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