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A jumper is provided on the main module that defines whether the unit
powers up in the automatic or manual mode. Default mode is automatic.
The audio connections are made with separate three-pin Weco-type connectors
for each audio channel. The connectors have a removable mate that is wired to
the audio cable with screw down compression terminals. The input and output
audio connections are all the same style connectors.
All GPI connections are 9 pin ‘D’. The input ‘D’ connectors for the GPIs are
female, while the output of the switch is a 9 pin male ‘D’ connector. The switch
between GPIs is made with relays so that the logic level passes through the
switch unaltered. Default mode is the A signal passing to the output. See the
table on page 19 for the pin out of the connector.
There is an External Control connector, which is a female 9 pin ‘D’. The External
Control is used for external transfer control and also function monitoring of the
ARTS-201B. See the table on page 18 for the pin out of the connector.
The frame has space for two power supplies for redundancy, with the output of
each supply voltage diode OR’d with the same output of the other supply. Each
supply has its own AC line connection. If either supply fails or the AC line fails,
then the other supply will keep the unit running.
