211.0 mm (8.31”)
195.0 mm (7.68”)
65.5 mm (2.58”)
92.0 mm (3.62”)
196.0 mm (7.72”)
Dimensions Mounting
Parts included
1. 1 x NAC™ -3 Autopilot Computer - IPX5
2. 4 x Fixing screws
3. 1 x Micro-C Drop cable (male) - 0.6 m
4. 1 x Micro-C T-Joiner
5. 7 x Connectors
6. 1 x 30 Amp fuse
7. Warranty card & literature pack
NAC
™
-3
INSTALLATION GUIDE
Trademark
®Reg. U.S. Pat. & Tm. Off, and ™ common law marks.
Visit www.navico.com/intellectual-property to review
the global trademark rights for Navico Holding AS.”
1
2
3
4
5
6
*988-11145-003*
For setup instructions, commissioning guide,
product manuals, technical specifications,
certificates and declarations,
refer to the product website:
www.simrad-yachting.com
www.bandg.com
System wiring example
AUTOPILOT
CONTROLLER
2
1
NMEA 2000® Backbone
Micro-C Drop cable
Micro-C Power cable
Micro-C T-Joiners
Micro-C Terminator, 120 Ohm
Rudder drive & Feedback cable
1
T T
MFD
12/24V DC
12/24V DC
12V DC
NAC™ -3
COMPASS
GPS
SENSOR
DRIVE UNIT
5
6
4
3
2
3
4
5
6
Power
NMEA 2000® Backbone
Micro-C Drop cable
Rudder Drive & Feedback cable
RUDDER
FEEDBACK
IPX5
-2
MOTOR
MOTOR
+
-
CLUTCH / BYPASS
DRIVE
30 A FUSE
POLARITY LEDS
DRIVE
ENGAGE
SUPPLY
NMEA0183
ALARM
MODE
SCREEN
TERMINATION
REMOTE
SIMNET
RUDDER
Terminal access Drive units (Max 8A/12A Continuous/Peak)
Rudder Feedback
External Alarm
Mode/Function Selector
External I/O
NMEA 0183
Terminal layout Grounding
Network Remotes
Power
1
2 3 3
+
_
CONNECT WIRES
CHECK POLARITY INSTALL FUSE POWER ON
POWER SWITCH
ON
POWER SWITCH
ON
TO VESSELS
MAIN
GROUND
Ground the NAC
™ -3 before
any other connectors
SCREEN
TERMINATION
POWER SWITCH
OFF
SIMNET / NMEA 2000®
REMOTE
RUDDER
DRIVE DRIVE
DRIVE
ENGAGE
DRIVE
ALARM
RUDDER
FEEDBACK
SENSOR
NMEA 2000®
BACKBONE
POWER SWITCH
OFF
12/24 V DC
DO NOT
INSTALL FUSE
FUSE NOT
INSTALLED
INSTALL
FUSE
FUSE
INSTALLED
+
_
+
_
RED
BLK
WHT
BLU
NET-S
NET-C
NET-H
NET-L
GND
PORT
STBD
LAMP
S9
SIMSIMRRADAD
S35S35
SIMRADSIMRAD R3000XR3000X
STBY AUTO
S9S9
S9S9
FRQ +
FRQ -
MOTOR
SOL-1
MOTOR
SOL-2
SOL GND
SOL
SOL-1
MOTOR
SOL-1
MOTOR
SOL-2
SOL
GND
CMD
RET
MOTOR
SOL-1
MOTOR
SOL-2
REVERSIBLE PUMP HYDRAULIC LINEAR
DRIVE
ROTARY DRIVE
SOLENOID VALVE*
* Solenoid valves, 12 or 24V DC,
powered from NAC-3 Autopilot
NOTE:
NAC™ -3 Autopilot cannot operate externally powered solenoids unless installing isolating relays.
NAC™ -3 Autopilot ne peut pas commander des électrovannes sans utiliser un relais isolé.
NAC™ -3 Autopilot kann keine extern gespeisten Magnetventile ansteuern sofern keine isolierten Relais installiert sind.
NAC™ -3 Autopilot kan ikke kobles mot magnetventiler med eksternt tilført spenning uten at man benytter eksterne releer.
NMEA0183
Rx_A
Rx_B
Tx _A
Tx_B
IEC61162-1/2
(NMEA0183)
DEVICES
+
RET
+-
(Frequency rudder feedback)
MODE
SYSSEL
MANUAL
AUTOPILOT
RET
SYSSEL
RET
STEADYSTEER™
DISENGAGE
SWITCH
OPTION 1
OPTION 2
SYSSEL
RET
DRIVE
ENGAGE
ENGAGE SIGNAL
D
G
S
CMD
RET
CMD
RET
Supply
RX1
Option 1 - Disengage switch
• OPEN – Normal operation, can be controlled by controller.
• CLOSED to OPEN – Activates Auto mode, regardless of previous state.
• CLOSED - Disengaged. Cannot be controlled by controller.
Option 2 - SteadySteer™
• Manual steering overrides the active mode.
• If Auto mode or NoDrift mode was active before going into manual
steering, they will automatically re-engage at the new course.
• For any other modes, the autopilot goes into Standby mode.
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2
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