Measurement Computing PCI-COM232 - Manual (Page 12)

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3.4 PCI-COM232/4 Main DB37M Connector
Although the PCI-COM232/4 boards provide a cable that brings the four ports out to standard 9- or 25-
pin serial connectors, customers wishing to wire directly to the board can refer to Figure 3-3. The view
shown is looking into the actual connector from outside the computer.
Figure 3-3. PCI-COM232/4 37-Pin Board-Connector Pinout