ABB NEXUS-3 Series - Serial Ports Overview; LED Status Indicators

NEXUS-3 Series | Overview
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Subject to change without notice
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8
MAN0151 Rev 5
SERIAL PORTS
Pin
RS-232
RS-422
RS-485
1
DCD
TX-
TX-/RX-
2
RX
TX+
TX+/RX+
3
TX
RX+
NC
4
DTR
RX-
NC
5
GND
NC
NC
6
DSR
NC
NC
7
RTS
NC
NC
8
CTS
NC
NC
9
RI
NC
NC
NC = Not Connected
LEDS
User
Switch
Mode
Watchdog
Power
LEDS
1 … 4
Not
used
HDD
LED
On
Off
Blink
Pulse
HDD
-
-
Internal storage
drive activity
-
Power
Device is on
Device is off
Device is asleep
-
Watchdog
Internal MCU is not
functioning
normally
Internal MCU is not
functioning
normally
Firmware
bootloader is
active
Internal MCU is
functioning
normally
LEDs 1-4
Currently selected
user mode
-
-
-