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SIGNAL
SKYWATCH/STORMSCOPE If a WX-1000 processor is installed, this signal (SW1 on the Interconnect
(SW1)
Soft-keys
Page A-10 - Appendix A
July 18, 2013
The document reference is online, please check the correspondence between the online documentation and the printed version.
SKY899
Installation Manual
CHARACTERISTICS
wiring diagram, figure 2-3) switches the display between the WX-1000
and SKY899. Any general purpose SPST toggle switch can be used.
CONNECTION
Connector-Pin
P1-15
P1-23
CABLE
Minimum 22 AWG.
VOLTAGE
CLOSED (< 0.7 V dc) = Stormscope display mode
OPEN = SKYWATCH display mode.
CURRENT
<100 mA
Soft-key inputs come from the WX-1000/SKY497 display and are sent
the WX-1000 processor (if installed). The pushbuttons on the front of the
display are referred to as soft-keys (1), (2), (3), and (4). In every
operating mode a label identifying the button function is displayed next
to the button.
When using an alternate display device reference figure 2-4 as well as
manufacturer instructions concerning these connections. Required soft-
key connections will depend upon the alternate display capabilities (e.g.,
some displays control operation mode internally and ranges externally,
while others handle ranges internally and operation modes externally).
When installing multiple alternate displays, soft-keys inputs may require
several displays being connected to the same input (e.g., WX-
1000/SKY497 connected to all soft-key inputs, GNS430 to soft-keys 2 &
4 and Collins EFIS to soft-keys 2, 3, & 4).
Connection
Connector-Pin
P1-18
P1-19
P1-20
P1-21
P1-37
P1-38
P1-39
P1-40
CABLE
See paragraph 2.6.7
VOLTAGE
Active:
Inactive:
Signal Name
SMS
SMS_RET
Signal Name
SFTKEY1_IN From Display
SFTKEY2_IN From Display
SFTKEY3_IN From Display
SFTKEY4_IN From Display
SFTKEY1_OUT To WX-1000 Processor
SFTKEY2_OUT To WX-1000 Processor
SFTKEY3_OUT To WX-1000 Processor
SFTKEY4_OUT
To WX-1000 Processor
Min: 0.0 V
Max: 1.5 V
Min: 3.5 V or Open
(Internal 4.7 kΩ pull-up)
Max: 5.0 V
009-11900-001
Revision F
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