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80W Switched Mode DC Multi Voltage Slim Bench Power Supply

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Quoting product code: N27GG

£119.99

About this product

Overview

Product overview

• High specification bench power supply that can used as a stand alone, master or slave unit• Slim tower housing - ideal for workbenches where space is limited• Features current limiting, preview voltage and current, upper voltage limit alarm and remote sensing terminal • Rated load is DC 16V / 5A, DC 27V / 3A and DC 36V / 2.2A• Short circuit, overload and over temperature protection• Mains power input cord included

Rated 4 out of 5 by from Great piece of kit Very nice supply for the money. Good range of current / voltage, very small front panel footprint (although deep!) so it takes up little space on e.g. a shelf. As others have said, the output is a little strange in terms of adjustment steps and output caps, but overall these are small niggles. I've had mine for c18 months at least and it has been flawless for all of that time with no issues at all. Have powered very low consumption stuff - 3.3V at 20mA using the current limit to help avoid the 'magic smoke' appearing, as well as charging a pair of SLAs at full tilt - 28.8V at 1.8A. Very versatile, stays very cool no matter what you're doing with it.
Date published: 2014-09-07
Rated 5 out of 5 by from A agree with all the points from the other reviewers but it's an excellent piece of kit for the price, I've seen similar models to this on sale for 50% more than this, well done Maplins. My only criticism is that the 'Review' button needs to be held in to read the current setting and it's right next to the current setting knob so this can be a bit fiddly at times. I've only had this a couple of weeks but it's been used extensively during this period, as long as remains reliable then I'm very happy with it.
Date published: 2013-07-16
Rated 4 out of 5 by from I have used this about a week now used it several times a day. The build quality is good and the stability of the voltage and current regulation under varying load is admirable. The lack of fan noise is very welcome and the case gives off negligible heat even under heavy output loading. I would have given the product 5 stars but for some annoyances noted by the other reviewer. Firstly, even when "OFF" it presents about 700 ohm load. I got round this by putting a 16A Schottky diode in one output lead. This results in stable voltage drop over wide currents (0.32V at 100mA and 0.37V drop at 2000mA). Simply compensate for this when setting voltage, or use the remote sensor facility which does it for you. Secondly, it is hard to set a precise voltage and current as other reviewer notes. Thirdly, the max voltage limit setting is fiddly to adjust as it is a deeply recessed screw needing a tiny screwdriver - it would be better as an accessible knob. However, it is a versatile compact unit and good value for the money. I recommend.
Date published: 2012-04-12
Rated 4 out of 5 by from Useful bit of kit. The controls are data wheels so the voltage and current values change slowly as you turn it round and round. It has detents to click the values up and down. It remembers the last used settings in each range even after turning off (so no worries about it defaulting to some other values and blowing up your load). The actual intervals are a bit hit and miss though. I couldn't dial in exact values (4.00V) and jiggling the control up and down a bit around a value can result slight variations. The slave option is a bit fussy (requiring a permanent load at the output of all PSUs in order for the sync link to remain in force). The addition of remote sensing at the load was great. I used it to sense the real voltage at the LiFePO4 cell I am charging (so it will charge to 4.00V reliably). The Upper Voltage Limit feature is also good for charging lithium cells as you can set the output Voltage a fraction over at 4.10V and then set the UVL to 4.00V. When charging, the current limiter comes on and the Voltmeter shows the cell Voltage (if you use the remote sense wires). When the cell gets to 4.00V the UVL alarm will trigger and the charger will disconnect. Perfect. One issue is that when the output is "disconnected" (using the button), the PSU presents a large capacitace in parallel with a maybe 600-700 Ohm bleed resistor to the outputs. If you've got a battery connected and turn the output off, it will drain the battery slowly - the PSU presents a small load. If you connect a 12V battery to the outputs with them off, you'll get big sparks as the PSU output capacitor charges. You can get around this by pre-charging the output cap by turning the output on but then that kinda defeats the purpose of an output switch.
Date published: 2012-02-07
Rated 5 out of 5 by from Value for money and good features I'm not going to drown out this review, as it's been covered by the other reviewers on here. For a small bench power supply, and for the money it's a nice piece of kit to accompany the electronic hobbyist. As one reviewer already said, the u/l adjust is fiddly, a small external adjustment pot would be good.
Date published: 2016-11-23
Rated 3 out of 5 by from Small, but lacks finesse I bought this 80W Switched Mode DC Multi Voltage Bench Power Supply directly from a Maplin in Harrow a couple of weeks ago. It came complete with a UK mains power cord, and a set of leads with 4mm banana plug fittings at one end, and quite serviceable crocodile clips at the other. First Impressions were that the controls are not as intuitive as I would have guessed, but having read the manual all became clear. In essence the unit does what it's supposed to, but in operation it has a number of niggles that range from being mere curiosities of design, to glitches that need to be watched out for, though nothing that immediately warrants a return. When initially setting up the device for a given output, selecting the desired range (16v/27V/36V) is achieved by pressing the appropriate button on the front panel. To set the desired output voltage level within the range, the user needs to press, and hold, the Review button before using the two main controls to set the desired voltage and current limit levels. This reveals the first issue, which is that setting the output voltage and current limit levels is a two handed operation. Having a latch on the Review Button so that you didn't need to constantly press it with one finger while manipulating the output setting controls with the other hand would make setting the desired values much easier. You can set each of the three voltage ranges up separately, however, which is useful. If required, a global voltage limit can also be set. This requires the use of a small screwdriver, which is inserted into a small hole in the case situated under the main voltage and current selector knobs. The need for the use of a screwdriver is another minor irritant, but I doubt I'll be playing with that setting very often so it's not a major problem. Why that control couldn't have been designed with a proper, user accessible knob is a mystery. Unlike the Review button, this setting is applied by clicking on the appropriate, latched control button; there's no need to keep this button pressed while adjustments are made. Having selected the appropriate voltage and current values, clicking the Output On button switches on the supply to the output terminals, which is a useful feature. You can set the settings desired before applying the voltage output to circuit. Testing the voltages and currents displayed on the built in meters was interesting. Using my Brymen BM235 Multimeter as reference I could see that, with no load, the Voltage display was within one significant digit of the actual output voltage; well within the quoted accuracy of the display. Under load, the ammeter also displayed a reading that was very close to that offered by my multimeter across a wide range of voltage and currents, and the current limiting capabilities of the PSU working very well on the unit. Under load, however, the on-board voltage meter became considerably less accurate. Especially when testing towards the top end of the PSU's current output range, the voltmeter displayed readings that were significantly (more then 1/2 a volt) under that which was read on the reference multimeter. While I can't offer certification of calibration on my Brymen multimeter, comparing the metered output of the PSU with another much older multimeter I also have showed a variance of only 0.02 volts between the two multimeters, so while they're not demonstrably perfect, they're consistent. While the on-board voltmeter is not wildly inaccurate, 1/2 a volt variance between displayed values and measured values at 14 volts output gives a variance of approximately 3.5% under voltage reading, which is way outside of the ±1% +2 counts that is the specified on-board meter accuracy. Another niggle that is a little disquieting is in respect to the offline characteristics of the supply. The output is highly capacitive. That's not good, and could lead to power spikes on connection of equipment even when the output is technically switched off. When the output is off, the output terminals should be completely open circuit in theory. It's not unusual that this is not the case; there's often circuitry behind the output terminals to prevent power spikes on switch on. This large a capacitance can cause problems, however, and care should be taken as a result. With the Output switched off, shorting the terminals together to discharge any output stage capacitors would probably be advisable if you are about to connect fragile, or low voltage equipment to the supply, lest the initial discharge damage your kit. The last niggle is a continuing irritant. The Voltage and Current Limit controls knobs are too rough to set an accurate voltage. Where I most commonly use 3.3v, 5v and 12v, none of these can be set precisely; they're either over or under, which is frustrating. Conversely, where the action of the controls is too rough to set a precise voltage or current level, changing from a low value to a high value, or vice versa, takes a large number of turns of the controls, which is also very irritating. In summary then, the PSU is small, quiet and if what is needed is a general purpose variable DC power supply with reasonable current supply, with current limiting capabilities, then this will do the task. If you're after a unit that also offers stability, metering accuracy and set value precision then I would suggest looking elsewhere. There is a large selection of bench PSU's in this price bracket to choose from, and I can't help buy feel there are better ones out there. The unit isn't terrible, but it's not great, and it is quite expensive in comparison to others offering similar specifications. The one killer feature this unit has over others I've looked at is size. It's a very small form factor, which is good, but from a technical perspective it's lacking in finesse. Given the issues I've come across already, I can't say that I enjoy using it much. The issues with the controls don't inspire confidence in the unit, and I don't believe the unit is offering good value for money, hence the low rating.
Date published: 2016-12-12
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Specification

Operating Specifications

Efficiency:

75%

Line Regulation:

4mV

Load Regulation:

20mV

Dimensions & Weight

Width:

53.5mm

Depth:

330mm

Height:

127mm

Weight:

1900g

What comes in the box with this power sue.

Asked by: Dawlish1
Contents: PSU, Mains Power Cord, Terminals (croc clips) and Manual.
Answered by: DaveB
Date published: 2017-02-03

Is it possible to download a copy of the manual for this supply?

Asked by: jimbob
A manual for the device has been provided on the product listing. It can be found under the downloads tab. or follow this link. https://maplindownloads.s3-eu-west-1.amazonaws.com/N27GG-4831.pdf
Answered by: Les
Date published: 2017-01-16

Is this power supply isolated?

Asked by: Andrzej
This is not listed in the technical specifications so I would have to assume that it is not.
Answered by: Les
Date published: 2016-08-29

What's the lowest doc voltage

Asked by: Neil
This information is presented in the user guide/datasheet for the device, which can be found on the downloads tab of the product listing. However if you are using a mobile phone or tablet to view our website it may not be visible. To this end I have copied in a link to the electronic version of the instructions as well as a brief summary of the requested information below for your convenience. https://maplindownloads.s3-eu-west-1.amazonaws.com/N27GG-4831.pdf ______________________________________________________ The lowest output voltage would be zero, as in no output at all. The DC voltage can be raised in increments of 0.1v so you can set any value between zero and the maximum in increments of 0.1v 0.1v, 0.2v, 0.3v, ..... 1.0v, 1.1v, 1.2v .. etc
Answered by: Les
Date published: 2016-02-15

Hi, Would this power supply work in America on a 110 v supply? Thanks in advance, Mark

Asked by: Mark
Unfortunately i am sorry but the item in question doesn't support use in you intended application.
Answered by: Darren
Date published: 2016-02-05

Do you stock suitable output leads for this product, or are they provided?

Asked by: Anonymous
They are provided with the item.
Answered by: Dominic
Date published: 2016-09-07

Hi,  i love this psu but I'm wanting to use the remote sense function.  Of coarse i've chucked the manual..  Can you please send me or post a link to the user manual.  Thanks.  Tony 

Asked by: Tony McM
Yes i have sent you a user manual for this product.
Answered by: Darren
Date published: 2015-11-09

What is the warranty on the N27GG switch mode power supply, please?

Asked by: SidB
All maplin products come with a full years warranty.
Answered by: Billy
Date published: 2015-07-17
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Downloads