Up to 24 channels
N8331A provides 24 isolated channels; the remaining models operate with 16 channels.
N8331 – Battery Cell Simulator with up to 24 Isolated Channels
For BMS, calibration and production testing with individually programmable cell voltages and four-wire measurement.
The N8331 series simulates up to 24 isolated battery-cell voltages in a compact 19-inch 2U instrument. Five models cover 0-5 V or 0-6 V and up to 3 A and 15 W per channel, while series connection supports cell-stack and battery-pack scenarios.
Precise cell voltage
0.1 mV resolution and 0.6 mV setting and readback accuracy support repeatable low-voltage tests.
µA current ranges
N8331BP and N8331CP measure small currents with 0.1 µA resolution in dedicated ranges.
Software-based workflows
LAN, isolated RS485 and the application software support channel batches, graphs, data analysis and reports.
Personal project consultation
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Select the appropriate technical configuration or access product documentation directly.
ART. NO.
Description
Current [A]
Power [P]
Voltage [V]
N8331A
|
Description
N8331A High-accuracy 24-channel battery simulator, 6 V, 1 A, 6 W per channel, 2U
|
Current [A]
1
|
Power [P]
6
|
Voltage [V]
6
|
BZS without display
Technical Data
Design
Standard 19"
Height
2
Interfaces / Protocols
max. current per channel
max. power per channel
max. voltage per channel
Number of channels
24
16
Product category
Battery Cell Simulators
Type of Batterycellsimulator
Without Display
Fault Simulation
> 10 Channels
Uni-/Bidirectional
Unidirectional
N8331B
|
Description
N8331B High-accuracy 16-channel battery simulator, 5 V, 2 A, 10 W per channel, 2U
|
Current [A]
2
|
Power [P]
10
|
Voltage [V]
5
|
BZS without display
Technical Data
Design
Standard 19"
Height
2
Interfaces / Protocols
max. current per channel
max. power per channel
max. voltage per channel
Number of channels
24
16
Product category
Battery Cell Simulators
Type of Batterycellsimulator
Without Display
Fault Simulation
> 10 Channels
Uni-/Bidirectional
Unidirectional
N8331C
|
Description
N8331C High-accuracy 16-channel battery simulator, 5 V, 3 A, 15 W per channel, 2U
|
Current [A]
3
|
Power [P]
15
|
Voltage [V]
5
|
BZS without display
Technical Data
Design
Standard 19"
Height
2
Interfaces / Protocols
max. current per channel
max. power per channel
max. voltage per channel
Number of channels
24
16
Product category
Battery Cell Simulators
Type of Batterycellsimulator
Without Display
Fault Simulation
> 10 Channels
Uni-/Bidirectional
Unidirectional
N8331BP
|
Description
N8331BP High-accuracy 16-channel battery simulator, 5 V, 2 A, 10 W per channel, 2U
|
Current [A]
2
|
Power [P]
10
|
Voltage [V]
5
|
BZS without display
Technical Data
Design
Standard 19"
Height
2
Interfaces / Protocols
max. current per channel
max. power per channel
max. voltage per channel
Number of channels
24
16
Product category
Battery Cell Simulators
Type of Batterycellsimulator
Without Display
Fault Simulation
> 10 Channels
Uni-/Bidirectional
Unidirectional
N8331CP
|
Description
N8331CP High-accuracy 16-channel battery simulator, 5 V, 3 A, 15 W per channel, 2U
|
Current [A]
3
|
Power [P]
15
|
Voltage [V]
5
|
BZS without display
Technical Data
Design
Standard 19"
Height
2
Interfaces / Protocols
max. current per channel
max. power per channel
max. voltage per channel
Number of channels
24
16
Product category
Battery Cell Simulators
Type of Batterycellsimulator
Without Display
Fault Simulation
> 10 Channels
Uni-/Bidirectional
Unidirectional
N8331 battery cell simulator overview
The N8331 series is a programmable multi-channel battery cell simulator for precise low-voltage and multi-channel testing. Depending on the model, it provides 16 or 24 isolated channels with 0-5 V or 0-6 V, up to 3 A and up to 15 W per channel. Voltage and current can be set separately for every channel. Channel isolation allows multiple outputs to be connected in series to reproduce a cell stack or the electrical state of a battery pack. The series includes N8331A, N8331B, N8331C and the N8331BP and N8331CP models with extended low-current measurement capability. All variants use a 19-inch 2U chassis. The application software supports multi-channel batch operation, channel-specific data and graph display, data analysis and reporting. Typical fields include BMS/CMS testing, portable electronics and the calibration of voltage-acquisition devices.
Key benefits
High channel density
Up to 24 channels in 2U enable parallel test stations with fewer individual instruments.
Isolated outputs
Isolation of every channel supports flexible series connections for multi-cell devices under test.
Accurate voltage simulation
0.6 mV setting and readback accuracy at 23 ± 5 °C supports repeatable cell-voltage levels.
Measure small currents
BP and CP models provide dedicated mA ranges with 0.1 µA resolution for quiescent-current measurements.
Four-wire sense
Direct voltage measurement at the DUT compensates for voltage drop caused by lead resistance.
Multi-channel evaluation
Batch operation, channel-specific graphs, data analysis and reports streamline complex multi-channel workflows.
Operating principle and connection
Voltage and current are set separately for each channel. The isolated channels can be routed individually to several DUTs or connected in series to form a cell stack. For larger stacks, the series also supports serial connection of multiple instruments; remote control and automated workflows are performed with the application software.
Four-wire connection: Two leads carry the output current, while two sense leads measure voltage directly at the DUT. This removes voltage drop across the power leads from the regulated and measured voltage.
Models and output ranges
| Model | Channels | Voltage per channel | Current per channel | Power per channel | Low-current range |
|---|---|---|---|---|---|
| N8331A | 24 | 0-6 V | 0-1 A | 6 W | - |
| N8331B | 16 | 0-5 V | 0-2 A | 10 W | - |
| N8331C | 16 | 0-5 V | 0-3 A | 15 W | - |
| N8331BP | 16 | 0-5 V | 0-2 A | 10 W | 0-2 mA |
| N8331CP | 16 | 0-5 V | 0-3 A | 15 W | 0-3 mA |
The P variants combine their respective A range with a separate low-current range. In that range, setting and readback resolution are 0.1 µA; the corresponding setting and readback accuracy is 2 µA for N8331BP and 3 µA for N8331CP, each at 23 ± 5 °C.
Accuracy and dynamic response
| Characteristic | Value | Condition or scope |
|---|---|---|
| Voltage resolution | 0.1 mV | Setting and readback, all models |
| Voltage accuracy | 0.6 mV | Setting and readback at 23 ± 5 °C |
| Current resolution in the A range | 0.1 mA | Setting and readback, all models |
| Current accuracy in the A range | 1 mA / 2 mA / 3 mA | N8331A / N8331B and BP / N8331C and CP; setting and readback at 23 ± 5 °C |
| Temperature coefficient | Voltage 30 ppm/°C; current 50 ppm/°C | 0-40 °C |
| Long-term stability | 100 ppm/1,000 h | Voltage and current |
| Voltage ripple and noise | ≤ 2 mV RMS | 20 Hz-20 MHz measurement bandwidth |
| Voltage rise time | ≤ 3 ms | No load and full load, 10-90% of full scale |
| No-load voltage fall time | ≤ 3 s | 90-10% of full scale |
| Full-load voltage fall time | ≤ 30 ms / ≤ 20 ms / ≤ 10 ms | N8331A / N8331B and BP / N8331C and CP; 90-10% of full scale |
| Transient recovery time | ≤ 200 µs | 10-90% load change at full voltage; recovery to within 50 mV of the previous voltage |
| Communication response | ≤ 10 ms | Series specification |
Typical applications
Vehicle BMS and CMS testing
Isolated channels reproduce individual cell voltages for battery-management and cell-management systems in new-energy vehicles.
UAV battery management
Multi-channel cell voltages support BMS/CMS test setups for unmanned aerial vehicles.
Energy-storage BMS
In storage systems, the N8331 provides precise channel-by-channel simulation of cell voltages.
Portable electronics R&D and production
Mobile phones, Bluetooth earphones and smartwatches can be supplied and tested with repeatable low voltages.
Voltage-acquisition calibration
Defined channel voltages provide references for acquisition devices such as fuel-cell voltage monitors.
BMS test platform and system integration
In a modular BMS test platform, the N8331 provides high-accuracy multi-channel battery simulation. Other tasks such as temperature, total-current, high-voltage, insulation, I/O or CAN simulation are provided by additional units in the described system architecture. The N8331 cell-voltage simulation can therefore be integrated into comprehensive workflows for accuracy, protection parameters, fault diagnosis, wake-up, balancing, SOC, pre-charge and PWM without attributing all of those system functions to the standalone instrument.
Interfaces, software and automation
| Equipment | Function |
|---|---|
| LAN | Network-based remote control and integration into automated tests |
| RS485, isolated | Serial communication with galvanic isolation of the interface |
| Application software | Voltage and current setting per channel plus multi-channel batch operation |
| Data display | Measurement data and graphs for each channel |
| Evaluation | Data analysis and reporting functions for documented test workflows |
Installation and environmental conditions
| Characteristic | Specification |
|---|---|
| AC input | Single-phase, 220 V AC ± 10%, current < 2 A, 47-63 Hz |
| Operating temperature | 0-40 °C |
| Storage temperature | -20-60 °C |
| Environment | Altitude < 2,000 m; 5-90% relative humidity, non-condensing; 80-110 kPa |
| Isolation | 1,500 V DC output to ground; 500 V DC between channels |
| Chassis | 2U, 88.0 x 482.0 mm with handles x 568.5 mm; net weight approx. 20 kg |
Frequently asked questions about the N8331 series
How many channels are available?
N8331A provides 24 channels. N8331B, N8331C, N8331BP and N8331CP each provide 16 channels.
Can channels be connected in series?
Yes. Every channel is isolated and intended for multi-channel series connection; multiple instruments can also be connected serially for larger cell stacks.
Which models measure in the µA range?
N8331BP provides a 0-2 mA range and N8331CP a 0-3 mA range. Both offer 0.1 µA resolution in that range.
How accurately is voltage set?
Setting and readback accuracy are 0.6 mV at 23 ± 5 °C, with 0.1 mV resolution.
How are lead losses compensated?
Four-wire sense measures voltage directly at the DUT and compensates for voltage drop across the current-carrying leads.
How is the instrument controlled remotely?
LAN and isolated RS485 integrate the instrument into automated workflows; the application software operates channels in batches and evaluates data.
Can the N8331 be used for BMS/CMS testing?
Yes. It simulates individual cell voltages in test setups for vehicles, UAVs and energy storage. Additional units are required for other system signals.
Can it test portable electronics in production?
Yes. Listed application fields include R&D and production of mobile phones, Bluetooth earphones and smartwatches.
Can it calibrate voltage-acquisition devices?
Yes. Its precise channel voltages are suitable for calibrating voltage-acquisition devices such as fuel-cell voltage monitors.
Technical consultation and project enquiry
Selecting the appropriate N8331 requires the channel count, voltage, current and power per channel, plus the expected low-current range. Please also specify the planned series connection, sense wiring, interfaces and test workflow.
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