Electrical Interface Selection - Black Box 2-Port RS-232/422/485 User Manual

2-PORT RS-232/422/485 PCI HOST ADAPTER

3.4 Electrical Interface Selection

Each port on the Adapter has the ability to be used in either RS-232 or
RS-422/485 mode. This is selectable via four 24 pin DIP-shunts at E1-E4. Please
use the following illustration to aid in the configuration of your electrical interface.
RS-232
Figure 3-7. Headers E1 through E4, which control electrical-interface
14
E1
E2
E3
E4
RS-232 and RS-422/485
selection.
RS-422/485
E1
E2
E3
E4