OPTO 22 LCSX-PLUS, Installation Manual

Page: 17 / 30

CONFIGURING THE SERIAL PORTS
SNAP-LCSX AND LCSX-PLUS Installation Guide 13
IDENTIFYING THE SERIAL CARD AND JUMPERS
The serial card is the card with the port connectors. Its jumpers (JP) are shown in the diagram below.
To change the serial port configuration, set jumpers on the serial card for each port as illustrated in the
following sections.
NOTE: JP7 must remain in its default position as shown above. Other positions are reserved for future use.
CONFIGURING COM PORT 0
The default mode for COM0 is RS-232, and the wiring diagram is
shown in
step 3 on page 6 . Pinouts are also shown below. Jumper
groups 2 and 4 control COM0. Default jumper settings are shown in
the diagram at right. (Jumpers F and G in JP2 are shown for
reference but grayed out, as they do not affect COM0.)
COM0 can also be configured for RS-485 two- or four-wire or for use
with a modem. See the following page for details.
JP2
OPTO 22
SNAP CANNED SX
SERIAL CARD
JP6 JP3 JP5
JP1
JP4
JP4
JP2
JP6
JP5
JP1
JP3
JP7
JP7
COM0 Default Jumpers.
Port connectors would be at
the top of this diagram.
Pinouts for COM0
Pin RS-232
1 DCD
2 TX
3 RX
4 RTS
5 CTS
6 DTR
7 GND