Originally Posted by chala
Maybe of interest:
“The maximum number of first generation SeaTalk
devices which may be interfaced to the SeaTalk
port of a SeaTalk to SeaTalk Converter is five.
The above limitation in fact relates to the current
carrying capacity of the converter (950mA) Raymarine
give no information in regard to the data capacity of the converter.
So for instance if there is 2 ST6002 controllers at 60mA, 200mA backlit.
1 ST50 Wind
and 1 Wind
repeater at 90mA, 215mA backlit and ST50 compass
at 90mA, 215mA backlit, in all 5 instruments and it happen that pushing the “dis” button on one instrument a little to long, then backlit light will come in full on all 5 displays with a total of 1045mA. This is in excess of the rated capacity (950mA) of the converter and it may start smoking. The same may happen if a supply from the autopilot
is also connected to the instruments. A voltage drop in the autopilot circuit created by the activation of the ram drive may draw current
in excess of 950mA from the converter. It is to be noted that the power required by the instruments above does not have to be supplied by the converter or by the autopilot. The ST instruments can be supplied by a dedicated supply as per Raymarine
Handbooks. To power isolate the instruments from the converter and the autopilot, only the Data and Negative wires are connected to the above.