Raymarine L1250DRC, Owner'S Handbook Manual

Page: 59 / 246

Chapter 2: Installation 2-27
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1. If more than two
hsb 2
Plus Series displays are to be connected, you must
use an hsb
2
Splitter Cable, Raymarine part number E55040.
2. hsb
2
displays at the end of the chain must be terminated using the Inline
Terminator plug (Raymarine part number R58117) included with your
hsb 2
Plus Series display unit.
3. The total cable length for an
hsb 2
network containing the maximum 10 dis-
play units (both Plus and Plus upgrades) must not exceed 40 meters. A net-
work comprised of only 8 displays can extend up to 60 meters.
4. Earlier HSB (non-Plus) Display units can be enhanced with a hardware
and software upgrade to provide full
hsb
2
Plus functionality.
5. Earlier non-Plus displays can also be outfitted with a software-only
upgrade, which enables
hsb 2
compatibility. However, these software-only
upgraded displays are not true Plus units. They must not use the Inline Ter-
minator plug because they are already terminated internally.
Like the old HSB system, this configuration only supports two displays:
two software-only upgraded units or one software-only upgraded with one
true Plus (or Plus upgraded) display.
An In/Out connector cable is provided for connecting to another
hsb 2
Plus
Series display.
Note: The HSB cables have ferrite clamps attached at each end to ensure
EMC conformance. The cables are available in lengths of 1, 3, 6, 10 and 20 m.
SeaTalk and NMEA In
The display unit can receive a comprehensive range of data. The primary data
is described below:
Heading data should ideally contain both magnetic and true heading. If only
one is available then a source of magnetic variation should be connected.
Table 2-4: Function of SeaTalk and NMEA Data
Data Primary Uses Suggested Source
Heading Chart: modes/ vectors Compass connected to SeaTalk bus,
NMEA Compass
Position Chart: own vessel position
MOB (also requires speed and HDG
data) SeaTalk GPS connected via Auxiliary JB
Existing GPS Navigator via SeaTalk bus
Existing GPS (or Loran-C) navigator with
NMEA output
Waypoint Chart: Waypoint and route transfer Existing GPS Navigator via SeaTalk bus
Existing GPS (or Loran-C) navigator with
NMEA output
81213_1.book Page 27 Monday, March 17, 2003 1:14 PM