Epson C82305 Series User Manual page 14

Jumper settings
Table 6. shows information about the interface
conditions that can be selected using jumpers. In all
cases, ON denotes the connection of the jumper
(covering both terminals), while OFF denotes the
disconnection of the jumper.
Table 6. Jumper settings
Note
If the host computer is not equipped with a power
supply for the Current Loop interface, these jumpers
must be connected to perform communication via the
Current Loop interface.
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