System 9000TS
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SECTION 10 – P925TS-O OUTPUT CARD
The P925TS-O Output Card is equipped with sixteen open collector outputs each
capable of providing 160mA @ 24vdc which can be connected to lamp / LED displays
as required.
The output of each channel sinks to OV on alarm and the24VDC is used a
common return for all Lamp / LED outputs.
Lamp Protection
During installation and commissioning or as a result of filament failure a short circuit
may occur in the output drive causing excessive current to flow in the lamp driving
circuit.
The 9000TS System is equipped with automatic electronic crowbars, which will protect
the output circuit if excessive current is drawn. If the output fails to operate in the
correct manner the drive circuit is turned off and will periodically attempt to
automatically recover until the fault has been removed.
Output Drive Type
Each of the sixteen output channels is capable of driving either conventional filament
lamps or LED’s.
When used with filament lamps the individual output drives pass a small current to
each remotely wired lamp to prevent large inrush currents and thermal shock during
lamp test.
In applications that require LED’s the “keep alive” current must be disabled in software
on a per channel basis to prevent the LED’s from illuminating at approx 40% of normal
brightness during the off cycle.
Card Address Settings
A P925TS-O Output Card is located to the right of the associated P925TS-I Input Card
each pair of cards must have the same address. i.e. If the 1
st
input card in the system
is set to address 0 the 1
st
output card must be set to 0 for the cards to function as a
linked pair.
Power On / Status LED
Each Card is supplied with a single green status LED on the front panel.
The LED would be on in the normal state to indicate that the card is powered and
there is no fault within the card.
If a card fault is detected the LED will go to off
