Pin assignments

The LI-7550 pin assignments are given on the case interior label. The label also gives LED blink patterns for the LI-7550 USB port.

The label in the LI-7550 describes pin assignments and LED indications.

DB-9 connector on RS-232 serial cable

The serial cable (part number 392-10268) has a round connector that attaches to the LI-7550 and a female DB-9 connector that attaches to a computer. Note that not all pins are used for communication between the LI-7550 and a computer.

The serial cable pin assignments.