Honeywell MKXXII Configuration Defined Synchro Inputs, Signal Timing Reference Inputs

Honeywell

MK XXII EGPWS Installation Manual

E 4.2.7.3 CONFIGURATION DEFINED SYNCHRO INPUTS

Quantity

Input Impedance: X leg

Input Impedance: Y leg

Input Impedance: Z leg Maximum Reverse Fault Current Input Voltage Range Reference Voltages

Accuracy

Pin Assignment (Signal Mnemonic): #1 X leg

#1 Y leg #1 Z leg #2 X leg #2 Y leg #2 Z leg #3 X leg #3 Y leg #3 Z leg

3

>140 KΩ

>140 KΩ

>140 KΩ

< 200 ∝amps

±11.8 VAC RMS ± 20% (leg to leg)

±26 VACRMS ± 20%

2.5% linearity + 0.1% full scale offset

J1-5	(SYN_3X)
J1-7	(SYN_3Y)
J1-6	(SYN_3Z)
J2-1	(SYN_4X)
J2-2	(SYN_4Y)
J2-18	(SYN_4Z)
J2-19	(SYN_5X)
J2-20	(SYN_5Y)
J2-3	(SYN_5Z)

E 4.2.8 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 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	> 140KΩ each line to signal ground
Maximum Reverse Fault Current	< 120 ∝amps
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	J1-4	(26REF_1H)
26VAC Reference #1 C	J1-24	(26REF_1L)
26VAC Reference #2 H	J2-34	(26REF_2H)
26VAC Reference #2 C	J2-35	(26REF_2L)

CAGE CODE: 97896 SCALE: NONE SIZE: A DWG NO: 060-4314-225 REV: C SHEET 171