Omega Vehicle Security OMG-COMM2-EX - Manual (Page 7)

Card Setup
OMG-COMM2-EX Page 3
Port Enable / Disable
Each port on the OMG-COMM2-EX can be enabled or disabled with switch
position 8 on the DIP-switch. The port is enabled with the switch ‘On’ or
‘Closed’ and disabled when ‘Off’ or ‘Open’. If any port is disabled, be sure to
disable the interrupt request for that port by removing the IRQ jumper.
Interface Selection
RS-422/485
To select the RS-422/485 mode of operation install dip shunts in sockets found at
E6 and E7. E6 sets Port 1 and E7 sets Port 2.
RS-232
To select the RS-232 mode of operation install dip shunts in sockets found at E5
and E8. E5 sets Port 1 and E8 sets Port 2.
IRQ Selection
Headers E1 and E2 select the interrupt request for each serial port (E1 - Port 2, E2
- Port 1). If COM1: is selected, the corresponding jumper must be on the IRQ4
setting. If COM2: is selected, the corresponding jumper must be on IRQ3.
2/9 3 4 5 7 10 11 12 15
2/9 3 4 5 7 10 11 12 15
E2
E1
Figure 3 - Header E1 and E2, IRQ Selection
Any two or more ports can share a common IRQ, provided a polling driver is
used, by placing the jumpers on the same IRQ setting and setting the appropriate
selections at E3. The following examples show the setup if a polling driver is
used. NOTE: Windows does not provide a polling driver. Consult your particular
software for IRQ selection. If no interrupt is desired, remove the jumper.