Onlogic HX511 Product Manual page 14

Each port' s serial mode and voltage between Off/5V/12V on Pin "9" is individually 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.
Power and Reset switch connectors are provided for use with momentary-contact switches making a
connection between each signal and ground. Power and disk activity LED connections are provided to
directly or indirectly drive indicator LEDs. Both provided signals are 5V sourced through a 330Ω
resistor.
22 COM4 RX COM4 TX+
23 COM4 CTS
24 COM4 DSR
25 COM4 DTR COM4 RX-
26 COM4 TX COM4 RX+
27 SHIELD SHIELD
28 COM4 RI / COM4 12V
12V / 5V / 5V
29 GND GND
30 RESET RESET
SWITCH SWITCH
31 GND GND
32 POWER POWER
LED LED
33 POWER POWER
BUTTON BUTTON
34 DISK ACT. DISK ACT.
LED LED
COM4
TX-/RX-
SHIELD
COM4 12V
/ 5V
GND
RESET
SWITCH
GND
POWER
LED
POWER
BUTTON
DISK ACT.
LED
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