Honeywell MK VI - Manual (Page 167)

Honeywell
MK VI MK VIII EGPWS Installation Design Guide
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4.2.4.2 Synchro Magnetic Heading
Quantity 1
Synchro Angle Range ±180 deg
Reference Voltages ± 26 VAC
RMS
± 20% (see 4.2.4.4)
Pin Assignment (Signal Mnemonic):
X leg
Y leg
Z leg J1-22
J1-23
J1-3 (SYN_2X)
(SYN_2Y)
(SYN_2Z)
4.2.4.3 Synchro Pitch Attitude
Quantity 1
Synchro Angle Range ±80 deg
Reference Voltages Not Required
Pin Assignment (Signal Mnemonic):
X leg
Y leg
Z leg J1-5
J1-7
J1-6 (SYN_3X)
(SYN_3Y)
(SYN_3Z)
4.2.4.4 Configuration Defined Synchro Inputs
Quantity 2
Reference Voltages ± 26 VAC
RMS
± 20%
Pin Assignment (Signal Mnemonic):
#2 X leg
#2 Y leg
#2 Z leg
#3 X leg
#3 Y leg
#3 Z leg
J2-1
J2-2
J2-18
J2-19
J2-20
J2-3
(SYN_4X)
(SYN_4Y)
(SYN_4Z)
(SYN_5X)
(SYN_5Y)
(SYN_5Z)
4.2.4.5 Signal Timing Reference Inputs
These inputs accept 400 Hz AC signals, and detect the “zero crossings” of these signals. These zero crossings are used to
time the conversion and input of AC signals. Absolute voltage level of these signals is not measured, but it must be within
the range specified below. Voltage below the specified minimum value may result in intermittent or “jittery” zero cross
detection.
Timing reference signals are required for input of most AC devices (not required for pitch and roll). These references can be
brought into the appropriate timing reference input, or the system can be configured to derive a reference from the signal.
Timing reference signals are specified for synchro inputs requiring a range greater than
± 80 degrees. Inputs requiring less
(i.e., Roll Attitude) are configured to derive a reference from the synchro input signal and do not require a separate reference
voltage input.
Quantity 2
Input Impedance > 140K Ω each line to signal ground
Maximum Reverse Fault Current < 120 µ A
A/C Input Signal Frequency Range 400 Hz, ± 10%
Maximum Input Voltage Swing (differential) 50V between input legs
Maximum Input Voltage Swing (ref. to Gnd) 50V from any leg to signal ground
Input Hardware Filtering None
Minimum Input Voltage ± 0.5 VAC
Pin Assignment (Signal Mnemonic):
26VAC Reference #1 H
26VAC Reference #1 C
26VAC Reference #2 H
26VAC Reference #2 C
J1-4
J1-24
J2-34
J2-35
(26REF_1H)
(26REF_1L)
(26REF_2H)
(26REF_2L)