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Navitron Systems Ltd |
Autopilot
Types NT921G & NT990G
Technical Specifications |
Whilst the NT921G and NT990G autopilots are similar in appearance and apparently identical in terms of the parameters specified below, it should be noted that the software structures differ significantly to reflect the steering and response characteristics of vessels up to approximately 2000 grt (NT921G) compared with larger vessels from approximately 2000 grt upwards (NT990G). |
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Certification
Standards: -
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Russian Martime Register of Shipping
(R.M.R.S) and Morsviasputnik Type Approved in accordance with ISO 11674 & IMO A342 (IX) as amended by MSC64/67
Annex 3.
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Autopilot
Input / Output Specifications
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Inputs:
-
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Outputs:
-
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Supply
Voltage Range
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11-40Vdc
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NMEA
0183 Heading Data (Isolated RS422)
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Power
Consumption
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2.5W
(@24Vdc)
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Update
Rate |
Selectable
@
1Hz, 11Hz or 22Hz |
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Illumination
Max
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8.1W
(@24Vdc)
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Sentence
Types (Mag/Gyro
versus Update Rate) |
Hz
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Mag
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Gyro
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Mag
Heading Input Ports: -
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1
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HCHCC
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Navitron
Heading Sensor Coil mounted above or below existing Mag compass
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Coil
type
HSC1 or HSC2 |
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HCHDG
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HEHDT
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APHCC
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AGHDT
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APHDG
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11
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HCHDM
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HEHDT
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Resolution
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0.25°
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HCHDG
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AGHDT
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22
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HCHDM
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HEHDT
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NMEA
0183 Heading Sentence from Electronic Compass (Priority and max update
rate as shown)
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XX
HDM
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25Hz
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Resolution
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0.1°
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XX
HDG
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16Hz
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XX
HCC
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28Hz
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Furuno
Heading Format: -
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XX
HDT
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25Hz
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Update
Rate
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Selectable
@
5Hz or 40Hz |
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Resolution
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0.1°
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Resolution
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Selectable
@
0.166° or 0.1° |
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Gyro
Heading Input Ports: -
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Isolated
1:1 Synchro
(if available in Gyro) |
400Hz
Excitation
from Autopilot |
Signal
Amplitude
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Selectable
@
5Vdc or 12Vdc |
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Resolution
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0.25°
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Step by
Step Heading Data: -
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NMEA
0183 Heading Sentence from Gyro or optional NT925HDI (Priority and max
update rate as shown)
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XX
HDT
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25Hz
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Steps
per degree
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Selectable
@
3, 6, 12 or 24 |
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XX
HDM
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25Hz
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XX
HDG
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16Hz
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Signal
Amplitude
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5Vdc
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XX
HCC
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28Hz
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Resolution
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0.1°
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Navitron
Custom Serial Heading Data: -
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(to
Navitron Digital Repeaters)
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Follow
Up Rate (Minimum): -
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All
Heading Input Types
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30°
/ Sec
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Navitron
Serial Input/Output Data: -
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(to
/ from Navitron Bowtruster Interface
and Analogue Steering Interface options) |
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Cross
Track Error Signal Input |
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NMEA
0183
Sentence types |
XX
APA
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Solid
State Solenoid Switching: -
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XXAPB
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Polarity
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Selectable
@
Common +VE/-VE |
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XXRMB
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XX
XTE
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Max
Rating
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5A
(11-40Vdc)
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NMEA
0180
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(CTE
Only)
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Panel
Alarms: -
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Operating
Temp Range
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-20
to +60 °C
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Power
Fail
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(int
/ ext supply fail)
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| Steering Fail |
(no
rudder response)
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Operator
Control & Selectors: -
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Heading Input |
(no
heading data)
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Yaw
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Alarm Test/Cancel | Data Input Fail |
(no
Track data)
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| Rudder | Autotrim On/Off | Off Course |
(specified limit exceeded)
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| Counter Rudder | Track On/Off | Rudder Limit |
(spec'd
limit/ROT reached)
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| Rudder Limit | Track HI/LO Resolution | Remote |
(remote
station engaged)
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| Illumination | Off Course Alarm level | Alarm Test |
(tests
all alarms)
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| Mode Switch | +1° / -1° keys (NT921G) | |||||||||
| Gyro/Mag Selector | Cancel/Confirm
keys (NT990G) |
Mechanical | ||||||||
| Width |
297mm
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Height |
176mm
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Compass
Safe Distance: -
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Depth
- behind bezel |
110mm
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NT921G/990G
Control Unit |
0.6m
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| Weight |
3.3Kg
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