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E-6
EIA-232-D Interconnections
E
Figure E-2
shows a way of wiring an EIA-232-D connector to enable
a computer to connect to a basic terminal with only three lines. This
is feasible because most terminals have DTR and RTS signals that
are ON, and which can be used to pull up the CTS, DCD, and DSR
signals.
Two of these connectors wired back-to-back can be used. In this
implementation, however, diagnostic messages that might
otherwise be generated do not occur because all the handshaking is
bypassed. In addition, the TX and RX lines may have to be crossed
since TX from a terminal is outgoing but the TX line on a modem is
an incoming signal.
Figure E-2. Minimum EIA-232-D Connection
CHASSIS GND 1
TxD 2
RxD 3
SIGNAL GND 7
RTS 4
CTS 5
DSR 6
DCD 8
EIA-232-D
DTR 20
. . . .
CONNECTOR
.
Summary of Contents for MVME167 Series
Page 1: ...MVME167 Single Board Computer Installation Guide MVME167IG D4 ...
Page 6: ......
Page 106: ...4 28 Debugger General Information 4 ...
Page 132: ...5 26 Using the 167Bug Debugger 5 ...
Page 146: ...A 14 Configure and Environment Commands A ...
Page 152: ...B 6 Disk Tape Controller Data B ...
Page 160: ...D 6 Troubleshooting the MVME167 Solving Startup Problems D ...
Page 168: ...E 8 EIA 232 D Interconnections E ...