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Active Research Ltd 2022
Troubleshooting Guide
First level PRO-MUX-2 diagnostics / fault finding can be performed by observing the LED behaviour.
The normal behaviour of the PRO-MUX-2 LEDs is described on the next page. If the LEDs are not
behaving as expected, this will indicate a fault in either the device connected to the PRO-MUX-2, the
wiring/connections, or the PRO-MUX-2 itself.
Some common checks to perform on all terminals of the PRO-MUX-2 if the correct LED behaviour is
not displayed:
• Connectors are fully inserted
• All pins of the connector are in the correct location (not overlapping into another port position)
•
Wires are terminated firmly and correctly (check polarity)
LED
Colour
State
Description
User action
PWR
Blue
Pulsing
Indicates presence of power
None required
IN (INCLUDING
‘SERIAL IN’)
Green
Flashing
Data available on input indicated by LED.
No action required
-
Off
No data available on this input or autobaud
detection in progress (up to 20 seconds)
Check if connected Talker is sending
data. If it is, review configuration.
OUT (INCLUDING
‘SERIAL OUT’)
Orange
Flashing/ solid
Flashes at a rate determined by baud rate and
data length. If available bandwidth is nearly full,
LED may appear solid instead of flashing
None required
STATUS
Red
Flashing / solid
Buffer Full – Overload condition, sentences are
being dropped.
Use a web browser to review configura
-
tion and correct overload condition.
Yellow
Flashing / solid
Warning, buffer is filling. Duplicate deletion is
managing to maintain output capacity by delet-
ing older copies of sentences
Review configuration to understand the
required rates of sentences which is
acceptable to any connected device
Green
Flashing / solid
Normal operation. No data issues.
No action required
-
Off
No data passing through outputs. Either no
input data, or if IN LED is active it means all
data is blocked.
Check if the connected Talker is sending
data. If it is, review configuration.
Ethernet
Green
Flashing
Data activity on the Ethernet port
No action required
Yellow
On
Indicates line speed at 100Mbps
No action required
Off
Indicates line speed at 10Mbps
-
Off
No data available
Check that the Ethernet network is oper-
ational.
ALARM
Red
On
Indicates alarm conditions have been met.
Review status page in browser to under-
stand alarm source.
MODE
Green
Pulsing / Flashing
Pulsing
- User defined mode selected,
Flashing
- Pre-defined operating mode select
-
ed according to mode pins. Number of flashes
= operating mode number
No action required
PWR and STATUS
(Combined)
Power = blue
Status = red
Power = on (solid)
Status = on (solid)
Critical HW Error Both Power & Status LEDs
are solid
Return to manufacturer if this persists
after a power reset
Intelligent Type Approved NMEA Multiplexer - PRO-MUX-2
