User's Manual

Table Of Contents
SYSTEM DESCRIPTION AND INSTALLATION MANUAL
T
3
CAS/Part No.9005000
Table 4-5: ACSS 41-Pin VSI/TRA Interface Descriptions (cont)
Connector Pin
Designation
Functional Description
J1-30
ARINC 429 (A) VERTICAL SPEED NO.2 INPUT:
This is the secondary ARINC 429 input bus to the VSI/TRA. This pin
accepts high- or low-speed ARINC 429 vertical speed data (Label 212).
Its use is determined by the source select discrete and configuration
straps CS0 and CS1 (pins 31, 32 and 33 respectively).
Paired with pin 14.
J1-31
SOURCE SELECT DISCRETE INPUT (NO):
This discrete input is used in conjunction with configuration straps CS0
and CS1 to program the VSI/TRA to accept and use the vertical speed
data being supplied. In some installations, this discrete is connected to a
switch in the cockpit and is used to select between primary and
secondary ARINC 429 vertical speed inputs. It is hard-wired to
configuration strap common if ac or dc analog vertical speed inputs are
used. Cycle power to update to the new configuration.
The following applies: O = Open, G = Ground.
Pin
SS
31
CS0
32
CS1
33
Definition
O O O ARINC 429 HS Primary
G
O
O
ARINC 429 HS Secondary
O G O
Pressure Transducer Module
(PTM)
G
G
O
ARINC 575 dc
G
O
G
ARINC 565 ac
O G G ARINC 429 LS Primary
G
G
G
ARINC 429 LS Secondary
J1-32
CONFIGURATION STRAP #0 INPUT (NO):
See pin 31.
J1-33
CONFIGURATION STRAP #1 INPUT (NO):
See pin 31.
4-82
04 Nov 2014
34-45-29
Pub. No. 8600200-001, Revision 004
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