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Digital I/O
The digital input buffer circuits shown in Figures 15 and 16 accept and drive
industry standard RS-422, RS-423, and RS-232 signal levels. These circuits may
be used to convert from one signal format to another.
The digital output circuit shown in Figure 16 can be configured by the user to
provide SONY CCU compatible I/O; contact closure circuits are not provided on
connectors 5-8. Refer to Table 6, “Digital Cable Connections,” on page 17 for
instructions on selecting the CCU capability. When this option is selected, the
RS-422 and RS-232 serial communications for that connector are not available.
Figure 15: Digital I/O Connectors 1-4
The circuits in Figure 16 also provide contact closure inputs and outputs. The
contact closure inputs are made by connecting pin 8 to ground (pin 3). This may
be accomplished with a TTL output referenced to pin 3 as ground. The output
contact closure is an SPST-NO relay and is not ground referenced.
Figure 16: Digital I/O Connectors 5-8