Impulse 7404 - Manual (Page 8)

Card Setup
Sealevel Systems COMM+4.PCI Page 5
Electrical Interface Selection
Each port on the COMM+4.PCI has the ability to be used in either RS-232 or
RS-422/485. This is selectable via eight 24 pin DIP-shunts at E1-E8. Please use
the following illustration to aid in the configuration of your electrical interface.
E5
E6
Po
rt
2
RS
-2
32
RS
-4
22
E7
E8
Po
rt
1
RS
-2
32
RS
-4
22
RS-422/485
E1
E2
Po
rt
4
RS
-2
32
RS
-4
22
E3
E4
Po
rt
3
RS
-2
32
RS
-4
22
RS-232
E5
E6
Po
rt
2
RS
-2
32
RS
-4
22
E7
E8
Po
rt
1
RS
-2
32
RS
-4
22
E1
E2
Po
rt
4
RS
-2
32
RS
-4
22
E3
E4
Po
rt
3
RS
-2
32
RS
-4
22
Figure 6 - Headers E1 - E4, Electrical Interface Selection