SKY899
Installation Manual
009-11900-001
Appendix A - Page A-7
Revision F
July 18, 2013
SIGNAL
CHARACTERISTICS
Horizontal Sync
Balanced horizontal sync from the WX-1000 Processor (if installed) and
output to the WX-1000/SKY497 display. Signal levels as specified in
RS-422.
CONNECTION
Connector-Pin
Signal Name
P1-28
(H) From Processor
P1-29
(HSYNC_IN-) From Processor
P1-11
(HS) To Display
P1-12
(HSYNC_OUT-) To Display
CABLE
See paragraph 2.6.7.
VOLTAGE
0-5 V dc
CURRENT
<100 mA
FREQUENCY
16.4 kHz
LOAD Z
1 k
Ω
Lamp Outputs
External annunciators are required when using an alternate display that
(above and below)
is not capable of displaying above, below, and unrestricted vertical
modes. Outputs are switched to ground when active. The lamps require a
separate dc source (constant or dimming circuit). If lamp voltage is an ac
source then an isolation relay must be used.
Depending on the vertical display mode selected the appropriate
annunciator will light. If in normal vertical display mode neither lamp
will light, if in above mode the ABV lamp will light, if in below mode
then the BLW lamp will light, and when unrestricted vertical mode is
selected both lamps will light.
CONNECTION
Connector-Pin
Signal Name
P1-66
LP1OUT - (ABV)
P1-85
LP2OUT - (BLW)
CABLE
Minimum 22 AWG wire for lengths up to 30 ft.
VOLTAGE
ON: 0 V dc or Ground
OFF: M32 V dc or open
CURRENT
Maximum current 300 mA.
ON/OFF Power
This input turns the TRC on and off. (See paragraph 2.24.2) When an
(SW2)
alternate display is installed a separate switch may be required, any general
purpose SPDT toggle switch capable of 1/2 A @ 28 V dc can be used.
When a WX-1000 processor is connected to with a SKY899 a
maintenance over-ride switch is necessary to enable the SKY899 to be
powered-up if the WX-1000 processor has been removed for service.
During normal operation, with a WX-1000 processor installed, SW2
should remain in the WX-1000 position. Any general purpose DPDT
toggle switch can be used.
CONNECTION
Connector-Pin
Signal Name
P1-4
ON/OFF
P1-5
ON/OFF_RET
CABLE
Minimun 22 AWG.
VOLTAGE
Less than 0.7 V = ON; open = OFF.
CURRENT
<100 mA
The document reference is online, please check the correspondence between the online documentation and the printed version.
