User Manual
 Card Setup 
Sealevel Systems COMM+4.PCI Page 3 
Interface Mode Examples SW1 – SW4 
Figure 1- Switches SW1- SW4, RS-422 
Figure 2 - Switches SW1- SW4, RS-485 ‘Auto’ Enabled, with ‘No Echo’ and the 
termination resistor in circuit. 
Figure 3 - Switches SW1- SW4, RS-485 ‘Auto’ Enabled, with ‘Echo’ and no 
termination resistor in circuit. 
1 2 3 4
ON
OFF
AT RT NE T
1 2 3 4
ON
OFF
AT RT NE T
1 2 3 4
ON
OFF
AT RT NE T










