Installation manual

Dennard 2025 Installation Manual Page. 9
10. Wiring connections
Electrical connections to the Dennard 2025 illuminator are made via terminal blocks inside the
power supply unit. To access the connections remove the 4 cover screws on the power supply and
remove the top cover.
WARNING: Ensure the mains supply is isolated at all times whilst the cover is removed from
the power supply.
The mains supply should be fitted with a circuit breaker as a method of disconnecting the supply for
maintenance. The circuit breaker shall be accessible and labelled such that it is easily identified as
the disconnect device for this particular unit. The device shall comply with IEC 60947. The
disconnect device and all wiring shall be of adequate rating to comply with the input requirements
of the PSU as stated in the specifications section.
The mains cabling shall comply with national wiring regulations.
Ensure the mains input cable is prepared as in Fig. 8. Feed the cable through the lower cable gland
and secure the gland nut using a torque of 1.8Nm. Use the cable tie to secure the cable to the
mounting post provided as shown in Fig. 7.
Connect the cable from the illuminator into the connector and earth point as shown in Fig. 7. Use
the cable ties provided to attach the cable to the photocell wires which are routed around the right
hand side of the enclosure. Ensure the correct polarity is observed. The red sheathed wire
connects to the positive terminal, labelled as ‘LED ARRAY +ve’ on the PCB.
WARNING: Do not increase the cable length, as this may cause performance problems with
the unit. You may shorten the cable to a minimum length of 1m.