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Building Automation Systems
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Lighting/Pulse Meter Programming
When Channel Is “ON”
You can select how you want the time clock output (Digital Output Mode) to behave in the event of a power failure at
the controller, which will control whether the lighting will stay on. You can choose the channel to be Normally Open or
Normally Closed during such periods.
AI1 Ambient Light Sensor Input
If using an ambient light sensor (0 to 5V or 1 to 5V), set the low- and high-scaling limits to AI2. These limits are what the
light sensor reads at low limit and what the light sensor reads at full scale.
A Lighting Channel Threshold and Hysteresis for each of the available channels can be set for this input signal. The
Channel Power Threshold is a setpoint for which AI1 is compared to determined then to turn off the selected cycle(s). The
Channel Power Hysteresis is a buffer value which prevents the channel from cycling off/on prematurely. For example, if
the input is scaled 0 to 1000 lumens and you want to turn off one channel if the input gets up to 500 lumens and allow it
to come back on if the input falls to 400 lumens, enter in 0 for the scaling low limit, 1000 for the scaling high limit, 500 for
the threshold and 10% for the hysteresis for that channel.
Select a threshold and hysteresis for the channels which will be allowed to be shut off based on this input hitting the
threshold. A common application for this feature is to control parking and exterior signage lighting. The channel will be on
whenever the area is occupied, except when there is too much ambient light. (Similar to the astronomical time function). If
AI1 is not used, the threshold for all channels MUST equal the scaling high limit.
AI2 Energy / Power / Monitoring Input
If you are using an energy meter, power meter or current transducer (0 to 5V), set the low and high scaling limits to AI2.
These limits are what the energy or power meter reads at 0V and what the energy or power meter reads at 5V. For a 4 to
20mA input to be wired to AI2, you must install a 250 Ω resistor between AI2 and GND.
To use this input with a threshold and hysteresis (Channel Power section) to shut off lighting channels, select the relevant
lighting channels (Enable AI2 Threshold checkboxes) and enter a threshold and a hysteresis to be used. If AI1 is not used,
the channel power threshold MUST equal the scaling high limit.
Select whether to allow the time clock output (Digital Output Mode) to be Normally Open or Normally Closed during “On”
periods.
The Channel Power Threshold is a setpoint to which AI2 is compared, in order to determine when to turn off the selected
channel(s). The Channel Power Hysteresis is a buffer value which prevents the channel from cycling off/on prematurely.
For example, if the AI2 input is scaled 0 to 10000 KW and you want to turn off some channels if the input gets to 7500
KW and allow them to come back on if the input falls to 6500 KW, enter in 0 for the scaling low limit, 10000 for the scaling
high limit, 7500 for the threshold and 10% for the hysteresis. Set this threshold to be larger than the accuracy/error
specification of the device being turned off, so it does not cycle on and off.
AI2 Ambient Light Input
If AI2 is not used for power limiting, a second light sensor can be used to monitor another area. Set the low and high
limits to AI2. These limits are the light sensor reading at 0V and the sensor reading at 5V, respectively. Check the Enable
box for each of the channels to be controlled by AI2 (in the Enable AI2 as Light Level Source column). Then proceed to
enter threshold and hysteresis values for each channel (located just below the AI1 AMBIENT LIGHT INPUT section). Each
selected channel (Enable AI2 as Light Level Source) will then have its threshold/hysteresis compared to AI2 instead of AI1.
Digital Input Channel Monitoring and Control
DI1 and Override 1 are used for Channel 1, DI2 and Override 2 are used for Channel 2, etc.
There are four Digital Input Modes which can be used with a digital input: Regular, External Override, Momentary Override,
and Monitor.
Regular mode:
The digital input is used in conjunction with the programmed schedule in determining when the relay
output should be on or off.
External Override Mode:
The digital input acts the same as the override button on the front of the Panel. The switch used
for this type of digital input must be a momentary N.O. switch.