Table 5.6-6: Aib-Arcnet Pin Designations - Moog 903 User Manual

903-0623-00 Rev. A
The default settings are illustrated in the shaded rows of Table 5.6-5, (and restated here for clarity) are
typically used for systems with short cables between the sonar components and the multiplexer modules:
Short Cables (default)
Sonar Head
Remote Mux
Console Mux
Sonar Processor
For systems with a long run of cable between the sonar head and remote module, the recommended
configuration is the following:
Long Cables
Sonar Head
Remote Mux
Console Mux
Sonar Processor
The definition of a short versus long cable is dependent on the data rate and the cable type, but typically
< 5 m is short, and > 100m would be considered long. If the cable length is in between these, the user
may need to try both configurations. There is not a definitive configuration of termination resistors and
drive voltages that is guaranteed to work for all cable types and lengths and it may be necessary to
optimize the signals. Tritech recommends the signal voltages to operate in the 7-15 Vpp range. Be aware
that many Tritech Sonars are by default configured for +12V drive voltages and may need to be adjusted
for short cable operation.
Front panel pin designations for the AIB-ARCNET plug-in modules are given in the table below.
*The chassis pin is connected to the front panel of the 903 card (or to the four board mounting holes of
the 907 card). The chassis pin is normally left open on the mating connector.
Focal Technologies Corp.
No terminator
68 ohm terminator, +5V drive
68 ohm terminator, +5V drive
No terminator
39 ohm terminator
68 ohm terminator, +12V drive
68 ohm terminator, +12V drive
No terminator

Table 5.6-6: AIB-ARCNET Pin Designations

Pin Designation
1 Chassis* (optional)
2
3
4
Model 903 User's Guide, FMB-X-2.5 Version
LAN+
LAN-
N/C
Page 5-30