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nLight: How do I configure an ADCX photocell?

To setup and calibrate an ADCX photocell with dimming devices through SensorView, you will first go to the photocell (such as an nCM ADCX RJB) and select Default Settings.

 

In Default settings, navigate to Photocell (copied below)

  • ADC Photocell On/Off: When enabled, the photocell will dim to 1% (or the Low Trim of the device), then send an Off command after the Transition Off period has passed. When disabled, the photocell will dim to 1% (or the Low Trim of the device) but will not send an Off command.
  • Photocell Transition On/Off: This is the length of time the photocell will wait before turning the lights on or off based on the ambient light level. This has no effect if ADC Photocell On/Off is set to Disabled.
  • Set-Point: This is used to set the light level the Photocell will attempt to maintain (in Foot-Candles). When the light level is above this point it will dim, when below this point it will brighten.
  • Sunlight Discount Factor: This is used to affect how the Photocell compares the ambient light level to its Set-Point. We recommend always leaving this the default value of 4.

 

Configure the ADC Photocell On/Off and Set-Point to the appropriate levels. (For example, to maintain a light level of 40 FC, the set-point would be 40 FC). Select “Save Defaults and Apply Now” to save the settings.

 

Next, we will need to configure the dimming devices controlled by the photocell, for example an nPP16 D. Navigate to it in the Device Tree, then select Default Settings (Copied Below)

  • Follow Photocell Mode: This affects how the device responds to the dimming photocell.
    • Disabled: The device will not follow the photocell.
    • Enabled (Negative Only): The device will follow the dimming photocell. Wallpod dimming adjustments cannot raise the lights above the ADCX dim level.
    • Enabled (Both Positive and Negative): The device will follow the dimming photocell. Wallpod dimming adjustments can raise the lights above the ADCX dim level.
  • WallPod Dimming Adjustments: How manual dimming (such as nPODM DX) adjustment affect ADCX control.
    • Permanent: Raising the light level will permanently adjust the dimming level from the ADCX photocell. The photocell will still attempt to raise/lower the lights with the adjustment.
    • Temporary: As permanent, however it will reset to the original dimming levels from the ADCX photocell when cycled Off/On.
    • Temporary Override: This temporarily disables photocell control when the dim level is adjusted. The photocell resumes control when the device is cycled Off/On.

 

Configure the above settings for the desired application. Select “Save Defaults and Apply Now” to save the settings. The ADCX photocell should now control the device.

If you are using push-button programming, you will configure the same settings using the instructions for the devices.
ADCX Photocell- http://www.acuitybrands.com/-/media/products/nLight/410437/document/IN-2_2_pdf.pdf
Relay Pack- http://www.acuitybrands.com/-/media/products/nLight/147243/document/IN-10_3_pdf.pdf

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