Specifications

AR-B1564 User¡¦s Guide
3-3
(C) COM-A RS-232/TTL Select (SW2-1)
Figure 3-4 SW2-1: COM-A RS-232/TTL Select
(D) COM-B RS-232C/RS-422 Select (SW2-2 & SW2-3)
Figure 3-5 SW2-2 & SW2-3: COM-B RS-232/RS-422 Select