Keithley 2220 transformer bipolar power supply series
![Keithley 2220 – a series of transformer bipolar laboratory power supplies with two or three galvanically isolated channels Keithley 2220 transformer bipolar power supply series](https://www.tehencom.com/files/brands/keithley/2220/keithley-2220-seriya-transformatornykh-dvukhpolyarnykh-blokov-pitaniya.jpg)
Brief description of the series
Keithley 2220 is a series of maximum functional bipolar power supplies capable of supplying high-quality power to several independent electronic components. The series consists of 4 models, which differ from each other in the number of channels (2 or 3) and output power. Models 2220-30-1 and 2220G-30-1 contain two channels (30 V, 1.5 A, 45 W each). Models 2230-30-1 and 2230G-30-1 contain three channels (two of 30 V, 1.5 A, 45 W + third 6 V, 5 A, 30 W). Since the outputs of these transformer power supplies are galvanically isolated from each other, they can be connected in parallel (to increase current) and in series (to increase voltage or form a bipolar supply).
All models in this series come standard with a USB interface, which allows you to control their operation from a computer. In addition to the USB interface, models with the G index (2220G-30-1 and 2230G-30-1) contain an IEEE-488.2 (GPIB) interface. For detailed differences between the series models, see the interactive table. A full description of all the characteristics, as well as a driver for Labview and an IVI driver for MATLAB can be downloaded below on this page in the Documentation section.
All models of the series
The Keithley 2220 series consists of four models, which are presented in this interactive table. You can sort by any of the characteristics by simply clicking on its name in the table. To see all the characteristics of certain models, add them to the comparison.
Model |
Maximum output power (DC)
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Maximum output voltage (DC)
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Maximum output current (DC)
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Number of channels (DC)
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Voltage resolution (DC)
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Current resolution (DC)
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Operating principle
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Weight
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90 W | 30 V | 1.5 A | 2 | 1 mV | 1 mA | Linear | 8.2 kg | |
90 W | 30 V | 1.5 A | 2 | 1 mV | 1 mA | Linear | 8.2 kg | |
Expert selection
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120 W | 30 V | 5 A | 3 | 1 mV | 1 mA | Linear | 8.5 kg |
120 W | 30 V | 5 A | 3 | 1 mV | 1 mA | Linear | 8.5 kg |
Two and three channel models
Two of the four models in the Keithley 2220 series contain three fully independent channels with linear output voltage regulation. These are the Keithley 2230-30-1 and 2230G-30-1 models. Their appearance is shown in the photo below.
![Typical bipolar laboratory power supply of the Keithley 2220 series with three galvanically isolated channels Typical three-channel bipolar power supply of the Keithley 2220 series](https://www.tehencom.com/files/brands/keithley/2220/keithley-2220-tipovoy-trekhkanalniy-dvukhpolyarniy-blok-pitaniya-serii.jpg)
For simpler applications where two-channel power is sufficient, such as for bipolar audio circuits without a digital part, simplified models are available: Keithley 2220-30-1 and 2220G-30-1. These models are similar in all respects to three-channel ones, but are cheaper and contain only two galvanically isolated channels. Their appearance is shown in the photo below.
![Typical bipolar laboratory power supply of the Keithley 2220 series with two galvanically isolated channels Typical dual channel bipolar power supply of the Keithley 2220 series](https://www.tehencom.com/files/brands/keithley/2220/keithley-2220-tipovoy-dvukhkanalniy-dvukhpolyarniy-blok-pitaniya-serii.jpg)
Bipolar power supply mode
When developing and repairing electronic equipment, it is often necessary to supply circuits with bipolar power. Because all Keithley 2220 series models are galvanically isolated from each other, they can be connected in series, making it easy to create a bipolar power supply. The figure below shows an example of such a combination of two channels. Please note that with this configuration, the positive and negative voltage adjustment is performed synchronously, which is very convenient.
![Any model of the Keithley 2220 series can be used as a bipolar power supply Keithley 2220 series model in bipolar power supply mode](https://www.tehencom.com/files/brands/keithley/2220/keithley-2220-rezhim-dvukhpolyarnogo-istochnika-pitaniya.jpg)
Maximum functionality with three-channel models
Electronic devices often contain blocks that have "ground" pins that are not connected to each other. For example, in medical equipment, elements connected to a person must be isolated from the main circuit. Also, electrically isolated hardware modules are used in: data transmission systems over long distances, high-precision sensors, information collection systems in very noisy conditions, various systems with ADC and DAC, and many other cases.
The Keithley 2220 series has two models with three independent galvanically isolated channels. The figure below shows an example of using three isolated channels of the Keithley 2230G-30-1 to supply power to three separate pieces of medical equipment, which may be necessary when developing, setting up or repairing it.
![An example of using a Keithley 2230G-30-1 transformer power supply unit with galvanic isolation of channels, feeding three independent circuits of medical equipment Example of using a power supply Keithley 2230G-30-1 from 2220 series](https://www.tehencom.com/files/brands/keithley/2220/keithley-2230g-30-1-primer-ispolzovaniya-galvanicheski-razvyazannykh-kanalov.jpg)
Connecting power supplies to a computer
If it is necessary to connect Keithley 2220 series power supplies to a computer, this can be easily done using a standard USB interface, which is included in every instrument. And models with the G index, in addition to the USB interface, also contain a GPIB (IEEE-488.2) interface. Driver for Labview and IVI driver for MATLAB can be downloaded below on this page in the Documentation section.
This photo shows the rear panel of the 3-channel 2230G-30-1 model, showing the location of the USB and GPIB (IEEE-488.2) interface connectors. Also pay attention to the green group of contacts closed with plastic plugs – these contacts are used to compensate for voltage drops in the connection wires.
![Typical three-channel bipolar transformer type power supply of the Keithley 2220 series (model with IEEE-488, rear view) Typical three-channel power supply of the Keithley 2220 series (rear view)](https://www.tehencom.com/files/brands/keithley/2220/keithley-2230g-30-1-trekhkanalniy-dvukhpolyarniy-blok-pitaniya-vid-szadi.jpg)
And this photo shows the rear panel of the two-channel model 2220-30-1, which has only a USB interface connector. The green group of contacts is used to compensate for voltage drops in the connection wires.
![Typical two-channel bipolar transformer type power supply of the Keithley 2220 series (model without IEEE-488, rear view) Typical two-channel power supply of the Keithley 2220 series (rear view)](https://www.tehencom.com/files/brands/keithley/2220/keithley-2220-30-1-dvukhkanalniy-dvukhpolyarniy-blok-pitaniya-vid-szadi.jpg)
Additional accessories
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Keithley 2280-TSET-LEADOn order Expert selection
A pair of universal power cables for laboratory power supplies and multimeters. Length 1.2 meters, voltage up to 1 000 V, current up to 20 A. Interchangeable tips: banana plug, alligator clip, U type terminal.
From 3 150 UAH
Documentation and useful materials
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Description and characteristics of the Keithley 2220 series
EN, 4 pages, 0.7 MB
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User manual of the Keithley 2220 series
RU, 46 pages, 1 MB
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Description of Keithley KickStart Software
EN, 14 pages, 5 MB
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Keithley 2220 series LabVIEW driver
EN, version 1.2, release date 2012-08, 0.5 MB
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IVI (MATLAB) driver for Keithley 2220 series
EN, version 1.1, release date 2014-01, 5 MB