Manual

ECW-281B/281B2-R30/N270 Embedded System
Page 40
3.5.3 COM 2 Function Select Jumper (ECW-281B Series Only)
Jumper Label:
JP1
Jumper Type:
8-pin header
Jumper Settings:
See
77Table 3-22
Jumper Location:
See
77Figure 3-21
The COM 2 Function Select jumper sets the communication protocol used by the second
serial communications port (COM 2) as RS-232, RS-422 or RS-485. The COM 2 Function
Select settings are shown in
77Table 3-22.
COM 2 Function Select Description
Short 1-2 RS-232 Default
Short 3-4 RS-422
Short 5-6 RS-485
Short 5-6
Short 7-8
RS-485 with RTS control
Table 3-22: COM 2 Function Select Jumper Settings
The COM 2 Function Select jumper location is shown in 77Figure 3-21.
Figure 3-21: COM 2 Function Select Jumper Location