 
 
82 
Multi-4C/PCI VA3 
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