Solvline PCI - Manual (Page 130)

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Multi-8/LPCI VA3
3. Jumper Settings
a. Portx RT: RS422/RS485 Terminal Resistance Selection
(Port 1 is Port #1, Port2 is Port#2)
b. Slew: Slew Rate Limit Ability
Slew Rate Limit reduces reflected waves emitting from ends of
communication cables and speeds up slew-rate driver that restrains EMP
electromagnetic waves thereby enabling communication with no data errors.
But communication speed is limited in this mode.
 422: Set RS422 Terminal Resistor
 485: Set RS485 Terminal Resistor
 None: Do not set Terminal Resistor
 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.