SENA DirectPort UPCI Software - Manual (Page 17)

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7.2.2 Termination Resistance Selection
422: Set RS422 Termination Resistor
485: Set RS485 Termination Resistor
None: Do not set Termination Resistor
7.2.3 Slew Rate Limit Ability
10M: Not use Slew Rate Limit ability. Maximum
communication speed 921.6Kbps in this mode.
250K: Use Slew Rate Limit ability. Communication
speed is limited under 250Kbps.
10M
250K
10M
250K
422
485
NONE
422
485
NONE
422
485
NONE