9
Model HR-1P Projector Controller
SPECIAL CONNECTION INFORMATION
:
•
By default the HR-1P is configured to detect a
CONTACT
or a
NON-ISOLATED VOLTAGE
. By
special request at the time of the order, the unit can
be configured to detect an
OPTICALLY ISOLATED
VOLTAGE.
•
Both the
CONTACT/NON-ISOLATED
and
OPTICALLY ISOLATED
configurations use the EXT
CTL jack for detection of the signal.
•
For Contact/Non-Isolated Voltage
configurations
of the unit, ALWAYS ensure that if
you supply a voltage to the EXT-CTL jack, it is applied
as CENTER POSITIVE in the range of 3-24 vDC. The
device will not sense 0 volts by unplugging the EXT
CTL jack. The sensing circuit is normally ‘pulled’ high.
This means that in order to detect the ‘No-Voltage
applied’ condition, your circuit must represent a low
resistance.
•
For OPTICALLY ISOLATED configurations,
ALWAYS ensure that the voltage is applied as a
CENTER POSITIVE in the range of 3-9 vDC. This
voltage should be isolated from the units Supply
Voltage.
•
Failure to observe these warnings may result in
damage to the unit and void your warranty
