Optical Systems Design OSD350B, Руководство по эксплуатации, Страница: 7 / 12

OPTICAL SYSTEMS DESIGN
DOC ID: 10112902
OSD350B OPERATOR MANUAL
PAGE 4
3.4 ALARM OUTPUTS
There are alarm outputs available on the rear panel via a 9-pin D female connector.
The alarm outputs are normally open circuit when each of the power supplies is operational.
If there is a power supply failure or excessive operating temperature, the alarm output is connected to
ground via a relay.
The pin out of the 9-pin D female connector is as follows:
Pin 3
PSU 1 Alarm Output
Pin 4 PSU 2 Alarm Output
Pin 7 Ground Return
All other pins are not used.
NOTE: The alarm indication is only available if the OSD921 power supply is installed.