Video - Installation of a Photo Eye with 10k Monitoring to the SmartCNX Controller June 11, 2020 15:32 Updated Discover SmartCNX: Learn To Install a Photo Eye with 10k Monitoring. Related articles Video - How To Upgrade the Software on the SmartCNX Controller !Action Blocked! No Open Sensor !Action Blocked! No Close Sensor Fault 4, Gate no load, Smart DC operators EMX IRB-MON photo-eye installation to Smart Touch or SMART DC Controllers within operators manufactured after 2016: Does this photo-eye have a blue or red circuit board?