Discrete Inputs Checkout; Discrete Outputs Checkout; Hsdb Provisional Wiring Checkout - Garmin GTN 625 Installation Manual

6.10.3

Discrete Inputs Checkout

If the GTN is connected to external switches, perform the following steps:
1. Access the Discrete Inputs page, as shown
in Figure 6-52, by touching the 'Discrete
Inputs' key on the GTN Diagnostics page.
2. For each external switch that is connected,
exercise the switch and check the 'active'
or 'inactive' indication on the screen corre-
lating to the appropriate switch input, and
ensure it is displayed correctly.
6.10.4

Discrete Outputs Checkout

If the GTN is connected to external annunciators/
systems, perform the following steps:
1. Access the Discrete Outputs page, as
shown in Figure 6-53, by touching the
'Discrete Outputs' key on the GTN Diag-
nostics page.
2. For each annunciator output that is con-
nected to an external system or annuncia-
tor, toggle the output ACTIVE
(corresponding box is filled green and dis-
plays 'ACTIVE') and INACTIVE (corre-
sponding box is not filled green and
displays 'INACTIVE') by touching the key corresponding to the output. Verify that the appropri-
ate external annunciator illuminates when the output is set to ACTIVE and extinguishes when the
output is set to INACTIVE. If the output is not connected to an annunciator but provides an input
to another system, verify that the other system receives the signal.
6.10.5

HSDB Provisional Wiring Checkout

If provisional wiring has been installed for the GTS
8XX, GDU 620, or other Garmin LRU to interface
via HSDB, follow the procedure below to ensure it
has been installed correctly.
1. Go to the GTN Diagnostics page, as shown
in Figure 6-32.
2. Touch the HSDB (Ethernet) key.
3. For each Ethernet port that has provisional
wiring connected to it, ensure that the port
status displays 'Connected'.
190-01004-02
Rev. F
Figure 6-52. Discrete Inputs Page
Figure 6-53. Discrete Outputs Page
Figure 6-54. HSDB Port Status Page
GTN 625/635/650 TSO Installation Manual
Page 6-53