Simrad NAC-2 Installation Manual
204.0 mm (8.1”)
183.0 mm (7.2”)
57.0 mm (2.2”)
180.0 mm (7.1”)
190.0 mm (7.5”)
169.0 mm (6.63”)
91.0 mm (3.6”)
Dimensions Mounting
Parts included
1. 1 x NAC-2 Autopilot Computer - IPX5
2. 1 x NAC-2 Power cable - 2 m
3. 1 x NAC-2 Drive cable - 2 m
4.
1 x NAC-2 Feedback cable - 2 m
5. 1 x NMEA 2000 Network cable - 0.6 m
6. 1 x Micro-C T-Joiner
7.
4 x Fixing screws
8. Warranty card & literature pack
NAC-2
AUTOPILOT COMPUTER
INSTALLATION GUIDE
For setup instructions, commissioning guide,
product manuals, technical specifications,
certificates and declarations,
refer to the product website:
www.simrad-yachting.com
www.bandg.com
1
2
3
4
5
6
7
*988-11144-001*
System wiring example
AP44
AUTOPILOT
CONTROLLER
2
1
NMEA 2000 Backbone
Micro-C Drop cable
Micro-C Power cable
Micro-C T-Joiners
Micro-C Terminator, 120 Ohm
Drive cable
1
T T
MFD
12/24V DC
12/24V DC
12V DC
NAC-2
COMPASS
GPS
SENSOR
DRIVE UNIT
RUDDER
FEEDBACK
6
5
4
3
2
3
4
5
6
Power
NMEA 2000 Backbone
Micro-C Drop cable
Rudder Drive cable
IPX5
1 2 3 4
Connectors & Wiring
+
_
12 V DC
MAIN
POWER
SWITCH
0.9 m (3 ft)
FUSE,
20 AMP
2 m (6 ft)
1 m (3 ft)
T T
OPTIONAL
AUTO/STBY
BUTTON
RED
BLACK
YELLOW
BLUE
Key Function Color
1 - 0V DC
Black
2 + 12 / 24V DC Red
3
Auto/ Standby button (Optional)
Yellow
4 Blue
1
4
2
3
3
2
4
1
Power
Socket Plug
1. P
ower (12 / 24 V DC)) - Max 8A/12A Continuous/Peak
2. Drive (Drive unit) - Max 8A/12A Continuous/Peak
3. Feedback (Rudder reference - Resistive feedback units only)
4. Network (NMEA 2000)
Resistive
Rudder feedback
unit
Key Function Color
1 + 5V DC
Red
2 Signal Yellow
3 - 0V DC Black
Feedback
Socket Plug
3
1
1
3
2
2
Drive (Max 8A/12A Continuous/Peak)
Reversible pump
Hydraulic linear drive
Rotary drive Solenoid valve
Key Function Color
1 Clut
ch GND/Solenoid Common Yellow
2 Clutch Blue
3 Motor_A Red
4 Motor_B Black
Socket Plug
1
2
3
4
4
3
2
1
Auto/Stby button (optional)
Note: Navico NMEA 2000 Rudder feedback units should be connected directly to the NMEA 2000 backbone.
Helm-1 Combined
Drive &
Rudder feedback
unit
Example 1 Example 2
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