Simrad IS20 Manual page 50

If you plan to extend your SimNet system in the future it
may be advantageous to prepare for it by adding a few T-
joiners in central locations. The T-joiners provide easy
access to the network and can be replaced with a new
product, or the new product can be connected via a drop
cable.
SimNet power and termination
The following rules should be observed when installing
SimNet.
1
2
3
4
The SimNet network has to be terminated according to
the number and type of products connected.
In a small system consisting of maximum 5 SimNet
products and a total length of 5 m SimNet backbone
cable you only need the SimNet power cable with built in
termination (red disc on cable plug).
For additional information about SimNet ask for the
separate SimNet Manual.
50 | Installation
The connectors are weather proof according to IP66,
when properly installed. All unused SimNet connectors
must be fitted with the plastic cap to protect them against
dirt and moisture.
It must have a separate 12VDC power from the
battery bus or the circuit breaker board to reduce
interference
It must not be connected to the supply voltage
terminals of the Autopilot Computer
It will power a SimNet compatible instrument
system. Hence SimNet to other equipment can be
supplied via the autopilot, see the figures on page
51, 52 and 53
SimNet must be properly terminated, i.e. unless it
is a small system (see the figure on page 51) there
must be terminations at each end of the Simrad
backbone