Power Supplies - Drivers - Transformers
LED products need accurate and consistent electrical operating levels for optimum light output and lifetime over all anticipated environmental conditions. Crescent have a range of transformers and drivers to suit all expected conditions.
High Power LEDs
- High power LEDs, such as Luxeon and CREE are operated with constant dc current, and are always connected in series. There are a minimum and maximum number of LEDs allowable in a series chain, depending upon the driver selected.
- Multiple LED products are internally connected in series, ready to connect directly to a suitable driver. Multiple LED products can themselves be connected in series, taking account of the total number of LEDs in the series chain.
- Power LEDs run at two current levels i.e. 350mA and 700mA depending upon required performance and environmental operating conditions.
- LEDs can be dimmed. Dimming drivers use one of three techniques i.e. Potentiometer, 0-10Vdc analogue signal or DMX digital control.
- Weatherproof (IP rated) drivers are available for exterior or wet locations.
Crescent Modules (Low power LEDs)
- Non dimmable.
- Lower power LED products are connected in parallel.
- They use a constant voltage supply of 24Vac (or dc).
- To establish suitable supply (transformer), simply add the individual VA ratings of the products in a circuit, and choose the
next highest transformer VA rating.
The table below details some of our most popular drivers both constant current and constant voltage. We have the ability to supply a greater variety of units than those listed, please contact the technical dept with your particular requirements.
Constant Current Drivers for LEDs
| Part No | Input Voltage | No of LEDs (Min/Max) |
Dimensions (LxWxH mm) |
Dim Type | IP Rating | |
| 350mA Standard | CRE2843 | 240Vac | 1 to 7 | 100 x 40 x 28 | ||
| CRE2777 | 95-240Vac | 1 to 8 | 115 x 35 x 20 | |||
| 350mA Dimmable | CRE2846 | 220–240Vac | 4 to 12 | 103 x 67 x 30 | 0-10V or Potentiometer | |
| 350mA DMX | CRE2801 | 95-265Vac | 3 x (4 to12) | 315 x 63 x 45 | DMX512 | |
| CRE2835UL | 95-265Vac | 3 x (4 to12) | 210 x 95 x 60 | DMX512 | ||
| 350mA IP Rated | CRE2840* | 240Vac | 1 only | 32 x 34 x 25 | IP67 | |
| CRE2841* | 240Vac | 1 to 3 | 45 x 45 x 25 | IP67 | ||
| CRE2842* | 240Vac | 1 to 4 | 45 x 45 x 25 | IP67 | ||
| CRE2844* | 240Vac | 1 to 7 | 86 x 35 x 27 | IP67 | ||
| 350mA IP rated Dim | CRE2845DIM* | 240Vac | 4 to 12 | Analogue | IP67 | |
| 350 or 700mA | CRE4609 | 90-305Vac | 2 x 4 to 12 | 31 x 32 x 179 | IP20 | |
| CRE4614 | 90-305Vac | 2 x 4 to 12 | 33 x 77 x 100 | IP20 | ||
| 500mA Standard | CRE4001 | 198-265Vac | 5-12 | 179 x 31 x 32 | DALI | IP20 |
| 700mA Standard | CRE2851 | 240Vac | 1 to 3 | 100 x 40 x 28 | ||
| CRE2857 | 240Vac | 1 to 4 | Triac | |||
| CRE2858 | 240Vac | 4-12 | 133 x 40 x 31 | Analogue | IP67 | |
| 700mA Dimmable | CRE2856 | 220-240Vac | 2 to 5 | 103 x 67 x 30 | 0-10V or potentiometer | |
| 700mA IP Rated | CRE2854* | 240Vac | 1 to 6 | 133 x 40 x 31 | IP67 | |
| CRE2855* | 240Vac | 4 to 12 | 133 x 40 x 31 | IP67 | ||
350mA-1000mA |
CRE2802/18 | 240Vac | 2 x 9 max | 111 x 54 x 24 | 1-10V or Pot | IP20 |
* IP rated driver with flying leads - requires weatherproof termination. All other drivers have screwed terminal connections.
Constant Voltage drivers for LEDs
| Part No | Input Voltage | Max Power | Dimensions | IP Rating | ||
| PSU 24VDC | CRE9344 | 100-260 Vac | ≤60W | 203 x 42 x 32 | IP66 | |
| CRE9345 | 100-260 Vac | ≤100W | 274 x 68 x 42 | IP66 | ||
| CRE9346 | 100-260 Vac | ≤150W | 274 x 68 x 42 | IP66 | ||
| PSU 12VDC | CRE9390 | 170-250Vac | ≤60W | 203 x 42 x 32 | IP66 | |
| CRE9391 | 170-250Vac | ≤100W | 274 x 68 x 42 | IP66 | ||
| CRE9392 | 170-250Vac | ≤150W | 274 x 68 x 42 | IP66 |
