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© Sealevel Systems, Inc. 12000 Manual | SL9245 10/2021
Serial Port 3 Operation
Serial port 3 is the RS-485 serial port on the 12000 system.
For RS-485 half-duplex, no-echo mode, set the jumper on J12 to pins 2-3 and, in the Device Manager
Port Properties Advanced tab, enable the “16950 RS
-485
Enable” feature
. The COM Express carrier
board must be removed to access the J12 and SW1 to configure Port 3.
If the echo feature is required move the jumper on J12 to Pins 1-2.