Selectable control priority
CV or CC priority adapts start-up behaviour to voltage-sensitive or current-sensitive devices under test and their electrical characteristics.
N39400 – Programmable DC Power Supply with 4 Isolated Channels
For parallel supply testing in laboratories and production with separate outputs, remote sense and automated sequences.
The N39400 series combines four galvanically isolated DC outputs in a 19-inch 2U enclosure. It supplies multiple devices under test or separate power rails from one instrument, combining individual channel settings with a common operating interface for laboratories and integrated test systems.
Programmable test sequences
SEQ combines voltage and current settings with dwell times and adjustable rise times into repeatable routines for changing supply conditions.
Voltage at the DUT
Remote sense measures voltage directly at the load connection and compensates for cable voltage drops to regulate the supply at the DUT.
LAN and RS232
Two LAN ports and an RS232 interface enable PC control and the integration of multiple instruments into a test setup.
Personal project consultation
Do you need support selecting the right power supply? Our technical specialists will provide personal advice tailored to your application.
Select the appropriate technical configuration or access product documentation directly.
ART. NO.
Description
Current [A]
Power [P]
Voltage [V]
N39420-60-10
|
Description
N39420-60-10 Multi-channel DC source, 4 × 200 W, 60 V/10 A per channel, 2U, 4 isolated channels
|
Current [A]
10
|
Power [P]
200
|
Voltage [V]
60
|
4 Channel DC Source
Technical Data
Product category
DC Power Supply
Type of DC source
Standard DC Source
Multi-channel
N39420-150-04
|
Description
N39420-150-04 Multi-channel DC source, 4 × 200 W, 150 V/4 A per channel, 2U, 4 isolated channels
|
Current [A]
4
|
Power [P]
200
|
Voltage [V]
150
|
4 Channel DC Source
Technical Data
Product category
DC Power Supply
Type of DC source
Standard DC Source
Multi-channel
N39436-60-15
|
Description
N39436-60-15 Multi-channel DC source, 4 × 360 W, 60 V/15 A per channel, 2U, 4 isolated channels
|
Current [A]
15
|
Power [P]
360
|
Voltage [V]
60
|
4 Channel DC Source
Technical Data
Product category
DC Power Supply
Type of DC source
Standard DC Source
Multi-channel
N39436-150-06
|
Description
N39436-150-06 Multi-channel DC source, 4 × 360 W, 150 V/6 A per channel, 2U, 4 isolated channels
|
Current [A]
6
|
Power [P]
360
|
Voltage [V]
150
|
4 Channel DC Source
Technical Data
Product category
DC Power Supply
Type of DC source
Standard DC Source
Multi-channel
N39460-60-15
|
Description
N39460-60-15 Multi-channel DC source, 4 × 600 W, 60 V/15 A per channel, 2U, 4 isolated channels
|
Current [A]
15
|
Power [P]
600
|
Voltage [V]
60
|
4 Channel DC Source
Technical Data
Product category
DC Power Supply
Type of DC source
Standard DC Source
Multi-channel
N39460-150-06
|
Description
N39460-150-06 Multi-channel DC source, 4 × 600 W, 150 V/6 A per channel, 2U, 4 isolated channels
|
Current [A]
6
|
Power [P]
600
|
Voltage [V]
150
|
4 Channel DC Source
Technical Data
Product category
DC Power Supply
Type of DC source
Standard DC Source
Multi-channel
N39400 multi-channel DC power supply overview
The N39400 programmable DC power supply provides four isolated output channels for laboratory testing, system integration and production burn-in. Six models cover voltages up to 60 V or 150 V. Depending on the model, each channel provides 200 W, 360 W or 600 W and a maximum current of 4 A, 6 A, 10 A or 15 A. Voltage, current and power must be considered together when selecting each channel’s operating points.
The outputs use constant voltage and constant current regulation. Selectable CV/CC priority influences start-up behaviour, while remote sense compensates for voltage drops between the instrument and the DUT. Recurring supply routines can be stored as SEQ files. A 4.3-inch colour display, buttons and a rotary knob provide local operation; LAN, RS232 and PC application software support remote control. The 19-inch 2U format helps create compact test stations with multiple separate power rails.
Key benefits
Four test stations in one instrument
Four isolated, individually adjustable outputs supply separate DUTs and reduce the number of individual power supplies required.
Select the start-up behaviour
Voltage or current priority supports an output rise suited to the DUT and reduces the relevant type of overshoot.
Reproduce supply routines
Ten sequence files with up to 200 steps each, repetition settings and file linking reproduce recurring supply profiles.
Compensate for cable drops
A four-wire connection with up to 2 V compensation improves voltage regulation at the load connection when longer supply cables are used.
Control multiple instruments centrally
Dual LAN and PC software support setups with multiple instruments as well as the display and recording of measured values.
Set limits for each channel
Adjustable overvoltage, overcurrent and overpower limits shut down the output when exceeded; overtemperature protection adds internal monitoring.
Regulation and channel operation
In CV operation, the instrument regulates output voltage while the required load current remains below the configured current limit. Once that limit is reached, CC regulation takes over and voltage adjusts to the load. Priority selection determines the preferred control behaviour during output rise: CV priority suits sensitive processor or FPGA supplies, for example, while CC priority suits low-impedance loads and battery charging applications.
Voltage and current are set individually for each channel. The “All CH” view allows common setpoints for all four channels and switches all outputs on or off together.
Models and power range
| Model | Voltage per channel | Current per channel | Power per channel | Channels |
|---|---|---|---|---|
| N39420-60-10 | 0–60 V | 0–10 A | 200 W | 4 |
| N39436-60-15 | 0–60 V | 0–15 A | 360 W | 4 |
| N39460-60-15 | 0–60 V | 0–15 A | 600 W | 4 |
| N39420-150-04 | 0–150 V | 0–4 A | 200 W | 4 |
| N39436-150-06 | 0–150 V | 0–6 A | 360 W | 4 |
| N39460-150-06 | 0–150 V | 0–6 A | 600 W | 4 |
The maximum voltage and current ratings are not unrestricted simultaneous operating points. For each channel, P = U × I applies within its voltage, current and power limits. For example, 60 V at 15 A would require 900 W from an N39460-60-15 channel; at 60 V, its 600 W rating imposes a calculated upper current limit of 10 A. Channel power must be considered when sizing the supply for each individual DUT.
Resolution and dynamic behaviour
| Characteristic | 60 V models | 150 V models |
|---|---|---|
| Voltage resolution, setting and readback | 1 mV | 10 mV |
| Current resolution, setting and readback | 1 mA | 1 mA |
| Voltage ripple, 20 Hz–20 MHz | ≤20 mV RMS; ≤250 mV peak-to-peak | ≤25 mV RMS; ≤300 mV peak-to-peak |
| Voltage rise and fall time, no load | ≤50 ms each | ≤50 ms each |
Voltage and current rise times are adjustable. The no-load timing values describe output behaviour under the stated condition; resolution denotes the smallest setting or display increment.
Programmable functions
| Function | Operation | Benefit |
|---|---|---|
| V/I operation | Set the channel, voltage, current and CV/CC priority. | Defined supply conditions for each test point. |
| SEQ editor | Up to 10 files with up to 200 steps each; voltage, current, dwell time and rise times for each step. | Repeatable voltage and current profiles. |
| Cycles and file linking | Set repetitions and call another SEQ file on completion. | Build longer routines from prepared subsequences. |
| All CH | Common setpoints and simultaneous on/off control of all four channels. | Operate multiple similar test stations with common settings. |
Typical applications
Electronic assemblies in the laboratory
Supply separate power rails or multiple DUTs with individual voltage and current settings and monitor them on the colour display.
Production testing and burn-in
Supply up to four test stations simultaneously; integrate recurring routines into the production test system using SEQ and remote control.
Processor and FPGA supplies
Use CV priority to reduce voltage overshoot during start-up and remote sense to measure the supply voltage at the DUT.
Supply profiles for automotive electronics
Program voltage and current steps with SEQ for changing supply conditions and engine start-up test routines; check profile requirements against the instrument’s operating range.
Interfaces, software and automation
| Feature | Configuration | Function |
|---|---|---|
| LAN | Two RJ45 ports, standard | PC remote control; UDP network communication. Integrate multiple instruments with unique IP addresses. |
| RS232 | Serial interface, standard | Alternative remote control connection. |
| PC application software | Instrument and channel configuration | V/I and SEQ operation, protection settings, batch switching, graph display and measurement recording. |
| GPIB connection | Optional NE101 converter | RS232-to-GPIB conversion as a separate accessory. |
Connecting multiple instruments over LAN extends central control of a test setup. It does not electrically connect the output channels.
Installation and remote sense
| Characteristic | Configuration |
|---|---|
| Format and dimensions | 19-inch, 2U; 482 mm width including handles × 88 mm height × 560 mm depth. |
| Rack installation | Rack mounting kit available separately. |
| Mains connection | Check the mains configuration and input voltage against the instrument marking before connection. |
| Environment | Operation 0–40 °C; storage −20–60 °C; 5–90% relative humidity, non-condensing; altitude below 2,000 m. |
| Remote sense | Connect S+ and S− at the load; maximum compensated voltage drop 2 V. Fit the specified sense jumpers for local sense. |
Protection functions
OVP, OCP and OPP monitor adjustable voltage, current and power limits. Exceeding a limit shuts down the output and displays the corresponding protection message. OTP shuts down the output if the internal temperature becomes too high; its threshold is fixed within the instrument. Short-circuit protection is also provided. Protection messages can be acknowledged manually using “PROT-CLR”.
Frequently asked questions about the N39400
Are the four channels isolated from each other?
Yes. The four output channels are isolated from each other and can be adjusted individually.
Does 600 W refer to the entire instrument?
The N39460-60-15 and N39460-150-06 are specified at 600 W per channel. All three electrical limits of each channel must be observed.
How large can a sequence be?
There are 10 SEQ files with up to 200 steps per file. Repetitions and links to other files are configurable.
When is remote sense useful?
When supply cable voltage drops affect the voltage at the DUT. The compensated voltage drop must not exceed 2 V.
Is GPIB built in?
LAN and RS232 are integrated. GPIB connectivity is available through the optional NE101 RS232-to-GPIB converter.
Can multiple production test stations be supplied?
Yes. Four isolated channels support four test stations simultaneously. All CH simplifies common settings and simultaneous switching.
Which priority suits processor or FPGA cores?
CV priority is intended for these voltage-sensitive supplies to reduce voltage overshoot during output rise.
Can the N39400 be used for battery charging?
Battery charging is an application for CC priority to reduce current overshoot. Voltage, charging current and power must match the selected channel.
Technical consultation and project enquiry
Tell us the voltage, current and power required per channel, the number of test stations and your requirements for sequences, remote sense and remote control. We can support model selection and test system integration.
