NoLand Engineering, Inc.
N183-41 Serial Multiplexer Installation & Operation Manual
Page 6 of 6
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Great Lakes Marine Specialties
Great Lakes Marine Specialties
Great Lakes Marine Specialties
Great Lakes Marine Specialties
800
800
800
800----821
821
821
821----0207 USA & Canada
0207 USA & Canada
0207 USA & Canada
0207 USA & Canada
952
952
952
952----925
925
925
925----1285 All other Countries
1285 All other Countries
1285 All other Countries
1285 All other Countries
Troubleshooting
In general, most users will find the installation and operation of the N183-41 to be trouble-free.
However, if faults should arise, the following procedures are recommended to diagnose the
problem:
The majority of faults with electronic equipment are due to worn or incorrect wiring. In case of
trouble, the following should be checked first:
Power Supply Connections
Instrument Connections
RS-232 Interface
If all connections seem to be correct and a suitable ammeter is available, the power supply cur-
rent should be checked. The power supply current should be approximately 0.075A (75 ma.).
Any reading significantly above or below the figure indicate a defective unit which must be re-
placed. Please contact NoLand Engineering for further assistance.
An ammeter may also be used as a quick check on the instrument connections. Connect the me-
ter to the input terminals of the N183-41 (output from instrument}, and the meter should flicker
about once per second as data is transmitted from the instrument. This works best if the meter is
a low voltage AC setting.
Once you are sure that the supply current is correct and that data is being received, you can
measure the RS-232 output in the same manner as above. In this case, connect the ammeter to
the 'TX' and 'COM' terminal and watch for the once per second flicker indicating data transmis-
sion.
Warranty
NoLand Engineering, Inc., provides a two year replacement warranty against manufacturing
faults or component faults. A dated purchasing receipt must be provided.
RED to "TX" of N183-41
GRN to "COM" of N183-41
ORG to "RX" of N183-41
No Connection to "SHLD" of N183-41
