Install Manual Part 3

SKY497
Installation Manual
A-6
Rev. C
SIGNAL CHARACTERISTICS
RS422 Interface
NO CONNECTION TO EXISTING AIRCRAFT WIRING. The RS422 Interface is
available to support factory testing and analysis and
SHOULD BE LEFT
UNCONNECTED
.
NOTE
RS422 interface is configured via jumper P1-67 (see Table A on
the Interconnect Wiring Diagram, figures 2-2 and 2-3, sheet 2)
located in the connector back-shell.
CONNECTION TRC P1-9 (DR_RX+)
TRC P1-8 (DR_RX-)
TRC P1-2 (DR_TX+)
TRC P1-1 (DR_TX-)
Serial Interface
NO CONNECTION TO EXISTING AIRCRAFT WIRING. This interface (RS-232) is
available to support factory testing and analysis and
SHOULD BE LEFT
UNCONNECTED
. This serial interface defaults to the following settings:
Baud Rate 19,200
Parity: None
Data Bits 8
Stop Bits` 1
CONNECTION TRC P1-21 (IOP_SERIAL_TX)
TRC P1-22 (IOP_SERIAL_RX)
TRC P1-23 (IOP_SERIAL_GND)
SKYWATCH/STORMSCOPE If a WX-1000 processor is installed, this signal (SW1 on the Interconnect
Wiring Diagram, figure 2-3) switches the display between the WX-1000
and SKY497 (see para 2.6.10). Any general purpose SPST toggle switch
can be used.
CONNECTION TRC P1-31 (CWS_SS)
TRC P1-4 (SW_RET)
CABLE Minimum 22 AWG.
VOLTAGE CLOSED (Less than 0.7 V) = Stormscope Display
Mode
OPEN = SKYWATCH Display Mode.
CURRENT <100 mA
Soft-keys Soft-key inputs from the WX-1000/SKY497 display and output to 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 (see paragraph 3.2).
CONNECTION TRC P1-85 (SFTKEY1_IN) From Display
TRC P1-84 (SFTKEY2_IN) From Display
TRC P1-83 (SFTKEY3_IN) From Display
TRC P1-82 (SFTKEY4_IN) From Display
TRC P1-76 (SFTKEY1_OUT) To Processor
TRC P1-75 (SFTKEY2_OUT) To Processor
TRC P1-74 (SFTKEY3_OUT) To Processor
TRC P1-73 (SFTKEY4_OUT) To Processor
CABLE See paragraph 2.6.3.