Solvline PCI - Manual (Page 64)

64
Multi-4/LPCI VA2
3. Jumper Settings
a. Portx RT: RS422/RS485 Terminal Resistance Selection
(Port 1 is Port #1, Port2 is Port#2)
 422: Set RS422 Terminal Resistor
 485: Set RS485 Terminal Resistor
 None: Do not set Terminal Resistor
b. Slew: 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.
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