Raymarine DSM250, Owner'S Handbook Manual

Page: 32 / 122

2-12 DSM250 Digital Sounder Module
hsb 2 Connection
The DSM250 must be connected to an
hsb 2
PLUS Radar, Chart-
plotter, or Fishfinder display unit to show echo sounder data. The
DSM250 will not work with older HSB (non-PLUS) displays.
Note: Older HSB (non-PLUS) display units must be upgraded to
hsb 2
before they can function with the DSM250.
An HSB cable is required to connect the sounder module to the
display unit for showing echo sounder data. A 3m (10 ft) HSB
cable is supplied with the DSM250. These cables are also available
in lengths of 1, 6, 10, and 20 m. See
Table 2-1 Parts and Accesso-
ries on page 2-4 for the complete list and associated part numbers.
The HSB cable is attached to the three-pin male connector marked
HSB
on the connector panel of the sounder module. The connector
pins are shown in the following diagram; this is information is
provided as an aid to fault diagnosis.
Figure 2-7: HSB Connector
The HSB cables have ferrite clamps attached at each end to ensure
EMC conformance.
Pin 1
Pin 3
Pin 2
HSB connector
HSB connector
Pin Pin name Function
1 CGND Screen
2 HSB_POS HSB
3 HSB_NEG HSB
2 3
1
HSB
D4253-4
Rear of Display Unit