Blue Sky Network ACH1000, Руководство по установке

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July 2014 Blue Sky Network
100258 ACH1000 Page 14
WIRING DIAGRAM
Notes:
(1) Aircraft dimming control can be used with the ACH1000 (DB9 pins 4/5/6). Default is disabled. To
enable the external dimming control on the ACH1000 unit, select “Brightness” under the “Setup” option
and decreas
e brightness levels until reaching “Dimmer” option, then press OK.
(2) The 4-wire audio signals can be used to interface the ACH1000 to INTERCOMs or standard audio
panels. For example, this system can be installed with a PMA7000B audio panel (from PS Engineering) by
connecting its pin 12 to J1-K, pin 24 to J1-J, and both pins 13 (mic-) and 25 (spkr-) to J1-1.
(3) If the installer experiences extreme audio noise during system test (which is usually caused by the
low frequencies presented by power lines), it is recommended to disconnect wires/pins 1, 2 and 6 of the
DB9M Power Connector of the ACH1000, as the unit will use DB25F pin 5 as the ground reference
(ACH1000 has only one ground plane, the common ground). By disconnecting these wires, the installer
could eliminate the potential noise source (“ground loop”).