IEI Integration NOVA-HM551 v1.10 - Manual (Page 71)

NOVA-HM551 5.25" SBC
Page 57
4.5.3 COM 5 Function Select
Jumper Label: JP4
Jumper Type: 8-pin header
Jumper Settings: See Table 4-4
Jumper Location: See Figure 4-8
The COM 5 Function Select jumper sets the communication protocol used by the third
serial communications port (COM 5) as RS-232, RS-422 or RS-485. The COM 5 Function
Select settings are shown in the table below.
Setting Description
Short 1-2 RS-232 (Default)
Short 3-4 RS-422
Short 5-6 RS-485
Short 5-6, 7-8 RS-485 with RTS control
Table 4-4: COM 5 Function Select Jumper Settings
Figure 4-8: COM 5 Function Select Jumper Location
4.5.4 COM 6 Function Select
Jumper Label: JP5
Jumper Type: 8-pin header
Jumper Settings: See Table 4-5
Jumper Location: See Figure 4-9