ADITEL KW910-X2, Руководство пользователя

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INTRODUCTION
The purpose of the interface is to convert gyro compass
transmission to digital signals for delivery to heading displays on
the ship.
The interface consists of two parts in the one enclosure
1. Dual resolver to digital converter KW910-X2
a. Input coarse heading resolver voltages at 1:1
ratio
b. Input fine heading resolver voltages at 30:1 ratio
c. Additionally input heading data from the log
d. Output NMEA 0183 heading data
2. Power and data distribution interface
a. Input AC mains 115/230v 50/60 Hz.
b. Output from 8 connector blocks
i. 24v DC nominal voltage for display
instruments
ii. NMEA 0183 data signals
c. Status display LEDs for the gyro
BACKGROUND NOTES ON RESOLVER INTERFACING
The gyro’s resolver output should be tested for voltage to make sure that its orientation and alignment is correct. It is
easy to test the resolvers’ output if the gyro can be turned. The fine-ratio 30:1 resolver will produce zero volts at 6 degree
intervals. The zeros of the 1:1 resolver must occur at the same zero positions as the 30:1 resolver.
You should aim to have….
•
Fine ratio resolver as exact as possible, but within 1 degree.
•
1:1 ratio resolver within 3 degrees.
000.0 090.0 180.0 270.0
S1-S3
0 volts Maximum 0 volts Maximum
S2-S4 Maximum 0 volts Maximum 0 volts
•
The KW910-X2 will convert the signals as received.
•
The fine ratio resolver is used to indicate the exact heading within one of thirty 12 degree sectors from 000, 012,
024 etc up to 348 degrees.
•
The 1:1 resolver indicates the sector in which the heading lies. The KW910-X2 assumes the heading derived
from the sector is within 6 degrees of the 1:1 angle.
•
You may need to change the phase of the reference, just swap the wires round, to make the output rotate in the
right direction, or even swap the S1-S3 S2-S4 pairs in the final event.
INSTALLATION
The enclosure mounts on a bulkhead. The door can be fitted on either side. It is usually helpful to remove the door and
the inner chassis plate during installation. The enclosure must be grounded.
This manual does not give a wiring diagram for any particular gyro or ship. That has to be done by the installing
company.
SELECTION OF RESOLVER SIGNAL SCALING RESISTORS
These resistors are standard network resistors, 8 pins, 4 isolated resistors. They plug in to sockets on the PCB. Make the
total +/- 10 percent of the calculated value. There are some examples below. These resistors are already fitted, and a
small selection of spare resistors may be supplied. There are layout diagrams at the back of the manual.
1:1 input.
R1 + R2 +R3 +R4 = (Maximum resolver signal voltage) x 3 Kilohms
30:1 input. R5 + R6 +R7 +R8 = (Maximum resolver signal voltage) x 3 Kilohms
1:1 resolver signals 12 volts line to line. R1 + R2 + R3 + R4 = 36K ohms.
Use 22K + 10K + 3K3 + 1K = 36.3K.
30:1 resolver signals 6 volts line to line. R2 + R3 + R4 + R5 = 18K ohms
Use 10K + 4K7 + 3K3 + 47R = 18,047 ohms