User's Manual Part 2

T
2
CAS / Part No. 9000000
SYSTEM DESCRIPTION AND INSTALLATION MANUAL
34-43-20
15 Feb 2003
Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.
4--34
Table 4--3. 41--Pin VSI/TRA Interface Description (cont)
Connector Pin
Designation
Functional Description
J1--40 115 Vac, 400 Hz POWER INPUT (HI):
This pin, along with its return line (pin 23) supplies power to the VSI/TRA. Connect power
througha1Ampcircuitbreaker.
J1--41 SELF--TEST/DISPLAY TEST:
This input functions on an OPEN/GROUND logic (in relation to dc common) and in
parallel with the TEST Push button located on the front face of the indicator (for
maintenance purposes only).
When this input is activated and maintained in the GROUND state, the indicator performs
a self test procedure which results in:
-- The display of a representative test pattern within 3 seconds.
-- The transmission of an OPEN (invalid) state on the TCAS Display Status Discrete
Output for the duration of the test.