Onlogic HX511 Product Manual page 17

COM DB9 option
The serial port mode and voltage between Off/5V/12V on Pin 9 on Helix can be selected in the BIOS
configuration. The serial ports support RS-232, RS-422, and RS-485 configurations. Refer to the BIOS
manual in Appendix C for configuration instructions.
CAN DB9 option
The CAN port on Helix 511 supports CAN2.0 A/B at baud rates from 100-1000 kbaud. The system
CAN port is not internally terminated, and a properly terminated ( 120 Ohms, typical ) cable should be
used. CAN messages may be sent and received via a virtual serial port over USB. Windows and Linux
drivers are in-box for this interface.
Pin RS-232
1 DCD
2 RX
3 TX
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI/PWR
COM DB9 pinout
RS-422
TX- TX-/RX-
TX+ TX+/RX+
RX+ NC
RX- NC
NC NC
NC NC
NC NC
NC NC
NC/PWR NC/PWR
Pin Signal
1 CAN_2_L
2 CAN_1_L
3 GND
4 NC
5 NC
6 GND
7 CAN_1_H
8 CAN_2_H
9 NC
RS-485
17