5.8.3
V.24 Submodule
The V.24 submodule is used with the RK 512 computer link, data
transmission with procedures 3964/3964R, data transmission with the
"open driver".
Application
The V.24 submodule can be inserted in the following CPU:
Interface Submodule... For Use With...
V.24 submodule
CPU 928B
Circuitry
The following figure shows the circuitry for the V.24 interface
(transmit and receive lines):
Apart from the transmit and receive lines, the V.24 submodule has a
number of control and signalling lines to CCITT Recommendation
V.24/V.28. However, these control signals are not needed and not
used for the standard procedures of communication types RK 512,
3964/3964R and "open driver". (Exception: RTS/CTS with the "open
driver").
The following applies to V.24 signals:
Logic 0 is represented by a voltage
U
≥
+ 3V
Logic 1 is represented by a voltage
U
≤
−
3V
If you fabricate the connecting cables yourself, note that unused inputs
at the partner station may have to be connected to quiescent potential.
Further details can be found in the appropriate manuals and in CCITT
Recommendations V.24/V.28.
Data transmission rate
A maximum of 19200 baud is permissible for data transmission with
the V.24 submodule.
Device 1
GND
TxD
RxD
Shield
Device 2
GND
TxD
RxD
Shield
Figure 5-10
V.24 Interface
Interface Submodules
System Manual
5 - 72
C79000-B8576-C199-03
