RC1xx LED Lighting Controllers - User Manual
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15
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PNP signal
You can connect a PNP open collector
drive to the RC1xx’s input. Use the
connections shown opposite. The PNP
transistor should not pull up to more
than 24V.
If the P flag is set to ‘1’, the RC1xx
output turns on when the driving
transistor turns on. To reverse this,
set the P flag to ‘0’ (see Section
7.2.2 Internal trigger
You can set the RC1xx to generate its own trigger pulses. The period of
these pulses can be set in increments of 100μs from approximately 10ms
to 5000ms.
You can set the RC1xx to produce a single pulse for testing purpose. This is
set by either a
TR1
command (see Section 10.3.3, “General commands”) or
using the web page Trigger button (see Section 9,
(RC120)”).
7.3
SafeSense
The SafeSense feature of the RC1xx operates automatically. After setting
the rating for the light, the RC1xx senses the light on connection for its type
and characteristics. The unit does not need to sense the light again unless
the light has changed or the RC1xx has been power-cycled.
For further information on this feature, see the application note, APP936 –
SafeSense Technology, available from
7.4
SafePower
The RC1xx’s SafePower needs no intervention from the user for its
operation. The advantages of SafePower are:
»
Heat dissipation in the controller is very low
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The load voltage can be higher than the supply voltage
»
High continuous currents can be output with a reduced need for
heatsinking
For further information on this feature, see the application note, APP966 –
SafePower Technology, available from
7.5
Light characterisation
You can reduce the time it takes for your RC120 controller to reach high
accuracy in time-critical machine vision systems when changing from one
overdrive brightness setting to another. This can be done by instructing the
controller to make current and voltage measurements up to a customer
