Kyocera FS-3700 - Manual (Page 109)

RS-422A interface voltage levels
The interface signal voltage levels conform with the EIA RS-422A standard. The differential
voltage varies from 200 mV to 6V.
SERIAL Connector
The connector marked "I
šIšI " (RS-232C/RS-422A) on the rear panel is a DB-25S connector.
Use a DB-25P connector (or equivalent) for the connector on the cable.
C.2. RS-232C/RS-422A Interface
C-9