101019
OPERATIONS MANUAL PPM-LX800-G
7
Serial Connector Summary
COM3 and COM4 Configuration Options
Please see the
for further details.
RS-232 Mode
1. DCD
2. RX
3. TX
4. DTR
5. GND
6. DSR
7. RTS
8. CTS
9. RI
RS-422 Mode
1. N/A
2. TX+
3. TX-
4. N/A
5. GND
6. RX+
7. RX-
8. N/A
9. N/A
RS-485 Mode
1. N/A
2. TX/RX+
3. TX/RX-
4. N/A
5. GND
6. N/A
7. N/A
8. N/A
9. N/A
1 2 3 4 5
o o o o o
o o o o
6 7 8 9
DB9 Male
COM1 and COM2 Configuration Options
1. RS-232 Mode
2. RS-422 Mode with RTS transmitter enable
3. RS-422 Mode with auto transmitter enable
4. RS-485 Mode with RTS transmitter enable
5. RS-485 Mode with RTS transmitter enable and echo back
6. RS-485 Mode with auto transmitter enable
7. RS-485 Mode with auto transmitter enable and echo back
Modes 2, 4 and 5 require the RTS bit (MCR Bit 1) be set in order to transmit.
Mode 4 requires that RTS (MCR Bit 1) be de-asserted in order to receive.
If termination is required, then terminating resistors will need to be external
to the board. Delta termination is required if using auto terminating modes
(described above). Optional on-board terminating resistors are available in
OEM quantities. Contact your WinSystems Applications Engineer for more
assistance.
