The DX28 Expander is a 2-channel signal splitter/amplifier for NMEA 0183 data signal distribution. It can be configured as one 1-in x 8-out expander , two 1-in x 4-out expanders, or an autoswitching expander. The two inputs are completely independent and can operate at the same or different baud rates up to 38,400. The selectable auto-switching feature enables automatic switchover to the AUXILIARY input when signal is lost from the PRIMARY input. A bicolor (green/red) status LED on each input shows data activity and a third LED (yellow) provides “overcurrent” fault indication.
Each input drives four independent RS-422 outputs. The inputs use differential detectors, which are isolated from Power and Ground. The outputs are independent so that shorting one output does not affect the others. The two channels (PRIMARY & AUXILIARY) are identical and completely independent of each other except in “Autoswitch” mode. For a single 8-way expander, the 2 inputs are strapped together. To enable Auto-switching, connect the Auto terminal to GND so that all 8 outputs will pass the PRIMARY input and ignore the AUXILIARY input. A loss of PRIMARY data for 3 seconds will automatically switch to the AUXILIARY input. When the PRIMARY signal returns, the DX28
immediately switches back to it.
The LED on each input flashes when data is received on that input, green for PRIMARY and red for AUXILIARY. In Auto-switching mode, both input LED’s flash the same color at the same time, indicating PRIMARY or AUXILIARY as currently active. A third LED (yellow) is used for “overcurrent” indication. This LED turns on if the DX28 draws excess current. This can occur if an output terminal is misconnected. It may also indicate an internal fault of the DX28.
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Description
Specification
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Description
Product Features:
- Cable splitter
- 2000 Ω
- Material: ABS
- Black
ACTISENSE DX28 cable splitter/combiner Black
Model DX28 NMEA 0183 Dual Expander
ACTISENSE DX28, Cable splitter, 2000 Ω, Black, ABS, 88.9 mm, 63.5 mm
ACTISENSE DX28. Type: Cable splitter, Impedance: 2000 Ω, Product colour: Black. Width: 88.9 mm, Depth: 63.5 mm, Height: 25.4 mm
Specification
Features
Type
Cable splitter
Impedance
2000 Ω
Product colour
Black
Material
ABS
Quantity
1
Weight & dimensions
Width
88.9 mm
Depth
63.5 mm
Height
25.4 mm
Weight
85 g