General
Input voltage	220 - 240 V
Frequency	50/60 Hz
Output voltage	12 V
Power range	20-80 W
Colour housing	Black
Degree of protection	not specified
Regulation	Continuously variable
Sensor distance	max 2 m
Current protection	Non-resettable fuse resistor
Short-circuit and overload protection	resettable
Compatibility	Resistive loads, Class III lighting equipment
Data retention during power failure
Over voltage protection
Soft Start
Soft Stop
Use in switched socket

The Relco Dimmer Transformer RL7323, type 5500 SC-N, is an electronic power supply and dimming controller for 12-volt lighting systems. It is designed for continuous brightness regulation of ohmic loads and lighting devices of class III, with control via a sensor or a push-button. The device is designed for an input voltage of 220 to 240 volts at 50/60 Hz and delivers a constant output voltage of 12 volts. The maximum power consumption is 80 watts, with operation possible from 20 watts. The housing is black and has dimensions of 106 mm (length) × 57 mm (width) × 34 mm (height). The transformer is intended for use in switched sockets, for example in applications of home automation.

Applications

The transformer is suitable for controlling LED lighting, incandescent lamps, and other ohmic loads operating at 12 V. It is particularly suitable for indoor applications requiring continuous brightness adjustment, such as in living rooms, offices, or retail environments. Use in switched sockets enables integration into intelligent control systems, where lighting is controlled via external switches or sensors. The application is limited to class III devices, which do not require a protective earth connection.

Functions and Equipment in Detail

Continuous regulation is achieved via a sensor or push-button, with the sensor operating independently of mains polarity. The maximum distance between the electronics and the sensor is 2 meters. The light intensity is stored even during a power interruption, so that the lighting resumes in the last set state after power is restored. The transformer features current protection implemented via a non-resettable fuse resistor. Additionally, protection against transient overvoltages is integrated. In the event of a short circuit or overload, a resettable protection is activated, which must be manually re-enabled after the fault is resolved.

Technology Explained Simply

The transformer operates as an electronic power supply with integrated dimming function. The input voltage of 220 to 240 volts is stepped down to 12 volts, with output power varying between 20 and 80 watts. Continuous dimming is achieved by modulating the power supply, allowing brightness to be adjusted continuously. The Soft Start and Soft Stop functions ensure that lighting is switched on and off gently, which can extend the lifespan of lighting components. The storage of light intensity during power interruption enables consistent operation without requiring reconfiguration after each power failure.

Compatibility and Accessories

The transformer is exclusively intended for ohmic loads and lighting devices of class III. Use with inductive or capacitive loads is not permitted. Control is via a sensor or push-button, with the sensor operating independently of mains polarity. Integration into home automation systems is possible if the socket is switched.

Mounting and Installation

The device is designed for use in switched sockets and can be connected directly to the mains voltage. It is important to observe the specifications on the nameplate and to keep the device away from heat sources to ensure safe and reliable operation. Mounting typically occurs in an enclosure or wall socket, taking into account the dimensions 106 × 57 × 34 mm. Installation requires no additional tools or components, provided the electrical connections are made correctly.

Advantages in Operation

The transformer provides reliable and disturbance-free power supply with integrated dimming function. Continuous brightness regulation allows flexible adaptation to different lighting requirements. The Soft Start and Soft Stop functions reduce stress on lighting components. Storage of light intensity during power interruption ensures consistent operation. The resettable protection against short circuit and overload increases operational safety. Use in switched sockets enables easy integration into existing control systems.