PCIe-COM-8SM / -4SM User Manual
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Chapter 3: Hardware Details
There only user-selectable options for this card are for applying a termination load to the RS-
485 lines. Channel protocols are selected via software.
Figure 3-1: Option Selection Map
Factory Option Descriptions
Fast RS-232 transceivers (-F)
The standard RS-232 transceivers used are capable of speeds up to 460.8kbps which is
adequate in many applications. For this factory option, the board is populated with high-speed
RS-232 transceivers enabling error-free communications at up to 921.6kbps.
Low-profile mounting bracket (-L)
For system designers where space is limited we offer a low profile mounting bracket option.
The strengthening bracket accessory can not be used with this option.
