Collingwood PSDIM700 50W Constant Current IP20 Driver - 1-10V Dimmable

A 700mA constant current driver with real dimming control

The PSDIM700 is the part of an installation nobody sees and everybody depends on. It is a constant current LED driver from Collingwood that holds a fixed 700mA output and takes an analogue 1-10V signal, so compatible fittings can be dialled down smoothly rather than just switched on and off. Collingwood publish an output window of 2 to 71V at 700mA, which works out at roughly 50W of LED load on a single unit. If you have been searching for a 700mA 1-10V dimmable LED driver to sit behind a run of Collingwood fittings, this is the one that does that job.

The unit itself

There is nothing to specify here beyond the driver: one output, one current, no finish options. What matters is the shape of it. The housing is 123mm long and 79mm wide but only 22mm deep, and the whole thing weighs around 100g, so it tucks into places a chunkier driver simply will not reach. Collingwood list the construction as steel and aluminium. Connections are screw terminals, mains in on one side and DC out on the other, taking 0.5 to 2.5mm2 cable at both ends. It partners Collingwood constant current fittings rated at 700mA, and works with any 1-10V dimmer, lighting control module or building management output.

How It Works

A constant current driver keeps the current fixed and lets the voltage move to suit whatever is connected. The PSDIM700 holds 700mA and will settle anywhere between 2 and 71V to do it, which is what allows one driver to run a single fitting or several wired in series. On the input side it accepts 110 to 240V AC, draws up to 0.25A, and has a maximum input of 56W with an efficiency figure of 80 percent and a power factor of 0.95.

Dimming is analogue 1-10V. Two control cores run from the dimmer or control output to the driver, and the voltage sitting on that pair sets the light level. This is a separate low voltage signal, so a mains dimmer on the supply side will not control it. The driver is double insulated with a SELV output and has built in protection against short circuit, overload and overheating. It is supplied on its own, so the fittings, the 1-10V control gear and the cable all come from elsewhere in the specification.

Where It Works Best

This is a wiring accessory, so the question is where it lives rather than how it looks. IP20 means it has no protection against water at all, and it needs a dry, protected position: a ceiling void above the fittings it feeds, a service riser, a plant cupboard, a joinery plinth, or a sealed enclosure. If the lights it powers are outside, the driver still stays indoors or inside a weatherproof box.

That 22mm depth is the genuinely useful part. It slides into shallow voids and behind bulkheads and pelmets where deeper units cannot go. It is not a DIN rail unit and it is not plug and play, so plan on fixing it to a board or surface with room to get at the terminals. Typical work is dimmable Collingwood downlights on a 1-10V circuit in an office or retail fit out, feature lighting along a hotel corridor, or a 700mA garden lighting run where only the fittings are exposed to the weather. The rated ambient range runs from minus 25 degrees C up to 50 degrees C, so an unheated loft is fine provided it stays dry.

About Collingwood Lighting

Collingwood design and manufacture their LED products in Sywell, Northamptonshire, and have concentrated on LED technology since 2002, which is a long run in this trade. The brand states it was among the first to put fire rated, fully sealed for life and mains dimmable LED products in front of the UK electrical wholesale market. Collingwood also holds an EcoVadis Gold medal, placing it in the top 5 percent of companies assessed worldwide for sustainability.

Good to Know

• Warranty: 3 years.
• Rated IP20, meaning it is protected against solid objects larger than 12mm but has no protection against water. Keep it dry and indoors, or house it in a suitably rated enclosure.
• Double insulated with a SELV output, and protected against short circuit, overload and overheating.
• Dimming is 1-10V only. A mains dimmer, whether leading edge or trailing edge, will not dim this driver and should not be fitted on the supply to it.
• Constant current, not constant voltage. It will not run 24V LED strip, and every fitting on it must be rated for 700mA.
• The combined forward voltage of the fittings must land inside the 2 to 71V output window, so check the figures before deciding how many go on one driver.
• Terminals accept 0.5 to 2.5mm2 cable on both the input and the output side.
• Not DIN rail mount and not plug and play, so allow space to fix it down and reach the terminals.
• Keep it accessible. The driver is the component most likely to need replacing years before the fittings do, so avoid burying it behind sealed plasterboard.
• Care is simply keeping it dry and letting it breathe. Do not pack insulation tightly around it.
• Moonlight Design recommends installation by a registered NICEIC electrician.

Questions People Ask

What is the Collingwood PSDIM700 used for?
The Collingwood PSDIM700 is a dimmable LED driver that powers compatible constant current LED fittings, supplying a fixed 700mA at an output voltage of 2 to 71V from a 110 to 240V AC mains supply, with a maximum input of 56W.

Can the PSDIM700 be dimmed with an ordinary wall dimmer?
No. The Collingwood PSDIM700 is dimmed by an analogue 1-10V control signal carried on two dedicated control cores back to a 1-10V dimmer, lighting control module or building management output, and it will not respond to a leading edge or trailing edge mains dimmer.

Is the PSDIM700 constant current or constant voltage?
The Collingwood PSDIM700 is a constant current driver. It holds its output at a fixed 700mA and varies the voltage between 2 and 71V to suit the load, which is the opposite of a constant voltage driver that holds a fixed 24V and lets the current vary.

What is the difference between the PSDIM700 and the PSDIM350?
The Collingwood PSDIM700 and PSDIM350 are both 1-10V dimmable constant current drivers in the same 123 x 79 x 22mm housing, but the PSDIM700 delivers 700mA at 2 to 71V with a 56W maximum input, while the PSDIM350 delivers 350mA at 2 to 74V with a 30W maximum input.

How many LED fittings can one PSDIM700 run?
The number of fittings a Collingwood PSDIM700 can run depends on their forward voltage rather than a fixed count, because the fittings are wired in series and their combined voltage must stay within the driver's 2 to 71V output range while each one draws 700mA.

22mm height x 123mm length x 79mm width

• Collingwood Driver Guide 2025

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