NORTHROP GRUMMAN naviguide 4000, User, Installation And Service Manual

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NAVIGUIDE 4000 056336 Rev. AA
1.4: Technical Data Page 1–15
1.4 Technical Data
1.4.1 Steering Control Unit (SCU)
Power Supply
primary supply....................................... 24 V AC/DC (18-36 V), 3 A
backup supply ....................................... 24 VDC (18-36 V), 3 A
max. ripple content (DC supplies) ......... 4 Vpp.; extreme values must not exceed
36 V or fall below 18 V
power output to autopilot display unit .... 24 VDC, 1 A max. (unregulated, based on
primary power)
DC supply output................................... 24 VDC, 0.5 A max. (unregulated, based
on primary power)
Analogue Rudder Order Input
External input via isolation amplifier...... ± 10 VDC input range
Analogue Rudder Order Outputs
Two redundant analogue outputs .......... ±10 VDC non-isolated
configurable as proportional to rudder or-
der or rudder error; max. load 50 k
Ω
; for
internal use only, interfacing to analogue
steering gears to be made through iso-
lated proportional PCB only.
Serial Data In-/Outputs
Central Alarm Interface ......................... RS-422, 4800 or 9600 bd.;
output: NMEA 0183 „ALR“ sentence;
input: NMEA 0183 „ACK“ sentence
VDR Output ........................................... RS-422, 9600 bd.;
NMEA 0183 „RSA“ sentence;
NMEA 0183 „HTD“ sentence (with NAVI-
PILOT 4000 only)
Status Outputs
7 status relay contacts, NO & NC.......... All contacts rated
115 VAC, 0.5 A max. or 30 VDC, 1A max.
4 fixed contacts, assigned to:
Primary Power Failure,
Backup Power Failure,
System Alarm,
Off Heading Alarm;
3 configurable contacts, each assignable
to:
Override, ExtSys, G/M Advisor, Auto, Off
Hdg., Deadman, Helm Advisor, Mute,
Hdg. Diff., Nav., Track