CONFIGURING COM PORT 2 (SNAP-LCSX-PLUS ONLY)
SNAP-LCSX AND LCSX-PLUS Installation Guide
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CONFIGURING COM PORT 2 (SNAP-LCSX-PLUS ONLY)
The default for COM2 is RS-232, but this port can also be configured as RS-485 two-wire or four-wire. Jumpers
1A, 1B, 2F, and 2G control the mode for COM2. The grayed-out jumpers are shown for reference only.
NOTE: The mode may be shown incorrectly on the board itself. Use the diagrams below to set the mode.
COM2 RS-232 Configuration
COM2 RS-485 Configuration
Jumper functions and two-wire and four-wire jumper settings are shown below. Use jumper group 3 (JP3) for
COM2. Make certain that the JP7 jumper remains in its default position, as shown.
RS-232 Mode (default)
JP1
JP7
JP2
A B C D E F G
A B C D E F G
1
1
RS-485 Mode
JP1
JP7
JP2
A B C D E F G
A B C D E F G
1
1
RS-485 Jumper Functions
Two-Wire and Four-Wire Jumper Settings
JP3
