36
Sine/Cosine Output
The sine/cosine output can be configured for a
3-wire or 4-wire sine/cosine output, commonly
used with ComNav
®
, Robertson
®
, and other
autopilot systems.
Before you connect the external device, consider
the following important notes:
• The ADCU’s sine/cosine reference
voltage is an output, not an input. Do not
connect this terminal (#8) to the reference
output of the external device.
• If the device has its own internal
reference, do not connect the device to the
ADCU’s reference terminal (#8).
• Before you connect the device’s internal
ground wire to the ADCU, use a low-
impedance voltmeter to verify there is no
DC voltage present between the two
terminals. A DC surge could damage the
electronics.
• The maximum current draw from the
ADCU sine/cosine output is 10 mA.
• The B&G 4-wire sine/cosine output (also
known as “differential sine/cosine”) is a
substitute of the Halcyon
®
compass.
Sine/Cosine Output Wiring
In most cases, wire the device to the sine/cosine
output as noted below (see Figure 57).
External Device Wire:
Connect to Green
ADCU Terminal:
Sine
12
Cosine
10
Internal power ground
(not chassis ground)
7
Reference (input)
8 (KVH output)
1
2
11
10
9
8
7
6
12
5
4
3
Green Label
Sine
Ground
Ref. Voltage
Cosine (inverted)
Cosine
Sine (inverted)
Figure 57: Sine/Cosine ADCU Wiring
Continued
Connecting External Equipment
D