Chapter 8 ____________________________________________________________ Technical Data 
 
VAISALA______________________________________________________________________ 241 
Figure 126 on page 240 provides a schematic wiring diagram for the dual 
RS-485 connection, a dual 2-wire connection utilizing both channels. The 
correct jumper settings for the channel B are listed in Table 72 on page 
242. The jumpers are located on the module as illustrated in Figure 127 
below. 
 
  0903-024 
Figure 127  RS-232 Jumper Settings 
Figure 128 below provides a schematic wiring diagram for the 
combination of the RS-485 and RS-232 connection. Jumpers X3 and X6 
are used to select between the RS-485 and RS-232 modes for channel B. 
The correct jumper settings for channel B are listed in Table 72 on page 
242. 
 
  1006-102 
Figure 128  Dual RS-485 Wiring Diagram for RS-485 and RS-232