DirectPort-USB
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4. DirectPort-USB UC1B (RS422/485) Settings
4.1 DB9 Male Connector
RS422
RS485
4.2 JP1 Slew: RS422/RS485 Slew Rate Limit Function Settings
Select ‘Slew Rate Limit function on’ to reduce electromagnetic waves. Maximum serial
communication speed is restricted to 250Kbps when this function is on.
Slew Rate Limit allows communication without errors by activating slew-rate driver to reduce
reflection waves and EMI electromagnetic waves. However, communication speed is limited when it
is used.
4.3 JP2 RT: RS422/RS485 Terminal Resistor Settings
Off (Default)
On
RS422 Terminal
Resistor
RS485 Terminal
Resistor
Unused
(Default)
