Cables FAQ


What is the maximum distance (cable length) that an Enlighted sensor can be placed from the Control Unit (CU-4E)?

The maximum cable length between an Enlighted SU-5 sensor (SU-5E or SU-5S) and CU-4E control unit can be up to 300’ of CAT5E cable.  Multiple cables from different sensors going to different CUs can share the same raceway or cable tray without signal degradation or cross-talk.  Care should be exercised to maintain the separation of circuits from class 1 wiring in accordance with the requirements of the AHJ.

Can you connect more than two sensors using a splitter cable (CBL-CS-RJ45) to a Control Unit (CU-4E)?

Yes, multiple splitters can be used to power additional fixtureless sensors. The splitters can be daisy-chained together to support up to five Micro sensors (SU-5) from a single CU-4E.

Refer to the following articles for additional information:

What is the maximum distance allowed between the Micro sensor (SU-5E) and Control Unit (CU-4E-FM)?

The acceptable distance is up to 300 feet between the SU-5E and CU-4E-FM.

When using the CPL-RJ45 coupler, what cable needs to be used? Is it CAT5E or CAT5?

You can use either CAT5E or CAT5.

Are the wires on the plugload Aluminium?  And why?

These copper wires are "tinned" with solder to keep the strands together for solid conductivity when wire nutted.

What is the recommended number of cables per fixture that should be sent for 10 fixtures? Is it 1:1 of the product code: Micro sensor (SU-5E) to Control Unit (CU-4) CMP Rated, 12" cable?

One cable is required to connect the Control Unit (CU) and the sensor, and normally there is one sensor + CU per fixture. Without understanding how the CU will be mounted, there is no guarantee that the 12-inch cable will be long enough. Enlighted also has the option to provide 30-inch cables if necessary. If longer cables are required, then additional CAT-5 cable with RJ-45 connectors and couplers can be used with up to 300’ of total cable length.

What is the maximum cable length from the Gateway to Manage? If Manage has to be installed on another floor for future installations, will there be a Voltage drop, etc.?

The cable between the Gateway and Manage is standard PoE, so the standard Ethernet cabling specification applies: 100 meters maximum cable length. The PoE specification accounts for voltage drops and signal delays.

Is there any cabling guide available for CBL-5E-2W-30N cable for fixtureless applications?  

Check this Sensor Grid with Power Supply (02804-03) line diagram for fixtureless sensors.  

The CBL-5E-CU4-xxx cable pin configuration does not show which pins of the RJ45 connector are used to power up the sensor?     

Refer to the Gen 5 Sensor Cables for Control Unit (CU-4E) that provides cable assembly and pinout diagrams. Gen 5 sensors have the following 8-pin assignments:

Pin  Description
Pin 1  Not Connected
Pin 2  Not Connected 
Pin 3  Dimming Channel 2 
Pin 4  GND 
Pin 5  VDD
Pin 6  Dimming Channel 1
Pin 7  RX Data
Pin 8  TX Data  

Can the SU-5 sensor cable be installed within the same conduit enclosure as a 240-volt wire, or do the cables have to be segregated? Is there any risk of noise from the 240 VAC interfering with the Sensor and Control Unit (CU-4D-FM) serial communication due to the proximity of the 240VAC cable and the sensor to CU serial communication cable?

Since all Enlighted sensor cables are 600V isolation grade, installing them in the same conduit of the 240VAC usually doesn't cause any problems in terms of functionality or operation. However, Enlighted recommends consulting a local electrician to adhere to the local electrical codes.


The possibility of electrical noise interference is quite low because the sensor data transfer rate is relatively low by electrical data communication standards and the AC lines are either 50 or 60 Hz only. However, if there are power devices connected to the AC circuit that would generate and induce noise into the AC electric circuit in the application, there may be some noise issues.

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