PXIe-4135 Specifications
- Updated2025-04-29
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PXIe-4135 Specifications
PXIe-4135 Specifications
These specifications apply to the PXIe-4135.
- In MAX—The PXIe-4135 (40W) shows NI PXIe-4135 (40W), and the PXIe-4135 (20W) shows as NI PXIe-4135.
- Device front panel—The PXIe-4135 (40W) shows PXIe-4135 40W System SMU, and the PXIe-4135 (20W) shows NI PXIe-4135 Precision System SMU on the front panel.
Definitions
Warranted specifications describe the performance of a model under stated operating conditions and are covered by the model warranty.
Characteristics describe values that are relevant to the use of the model under stated operating conditions but are not covered by the model warranty.
- Typical specifications describe the performance met by a majority of models.
- Nominal specifications describe an attribute that is based on design, conformance testing, or supplemental testing.
- Measured specifications describe the measured performance of a representative model.
Specifications are Warranted unless otherwise noted.
Conditions
Specifications are valid under the following conditions unless otherwise noted.
- Ambient temperature[1]1 The ambient temperature of a PXI system is defined as the temperature at the chassis fan inlet (air intake). of 23 °C ± 5 ºC
- Relative humidity between 10% and 70%, noncondensing up to 35 °C. Derate max relative humidity 3% per °C for ambient temperatures between 35 °C and 50 °C. From 50 °C to 55 °C, relative humidity between 10% and 25%, noncondensing. See Current for humidity performance restrictions.
- Chassis with slot cooling capacity ≥38 W[2]2 For increased capability, NI recommends installing
the PXIe-4135 (40W) in a chassis with slot cooling
capacity ≥58 W.
- For chassis with slot cooling capacity = 38 W, fan speed set to HIGH
- Calibration interval of 1 year
- 30 minutes warm-up time
- Self-calibration performed within the last 24 hours
- NI-DCPower Aperture Time is set to 2 power-line cycles (PLC)
- Triax cover installed on unused triax connections
Cleaning Statement
PXIe-4135 Pinout
- Access LED
- Voltage LED
- Output Connector
- Triaxial Connector with Output HI terminal
- Triaxial Connector with Sense HI terminal
- Safety Interlock Input Connector
Device Capabilities
The following table and figure illustrate the voltage and the current source and sink ranges of the PXIe-4135.
DC voltage ranges | DC current source and sink ranges |
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600 mV 6 V 20 V 200 V[3]3 Voltage levels and limits >|40 VDC| require the safety interlock input to be closed. |
10 nA 1 μA 100 μA 1 mA 10 mA100 mA 1 A 3 A [4]4 Current is limited to 1 A DC. Higher levels are pulsing only. |
For additional information related to the Pulse Voltage or Pulse Current settings of the Output Function, for the PXIe-4135 (40W), including pulse on time and duty cycle limits for a particular operating point, refer to Pulsed Operation. For supplementary examples, refer to Examples of Determining Extended Range Pulse Parameters and Optimizing Slew Rate using NI SourceAdapt.
DC sourcing power and sinking power are limited to the values in the following table, regardless of output voltage. [5]5 Power limit defined by voltage measured between HI and LO terminals.
Model Variant | Chassis Type | DC Sourcing Power | DC Sinking Power |
---|---|---|---|
PXIe-4135 (40W) | ≥58 W Slot Cooling Capacity | 40 W | 40 W |
<58 W Slot Cooling Capacity | 20 W | 12 W | |
PXIe-4135 (20W) | ≥58 W Slot Cooling Capacity | 20 W | 12 W |
<58 W Slot Cooling Capacity | 20 W | 12 W |
- Additional derating applies to sinking power when operating at an ambient temperature of >45 °C.
- If the PXI Express chassis has multiple fan speed settings, set the fans to the highest setting.
Voltage
Range | Resolution (noise limited) | Noise (0.1 Hz to 10 Hz, peak to peak), Typical | Accuracy (23 °C ±5 °C) ± (% of voltage + offset)[6]6 Accuracy is specified for no load output configurations. Refer to Load Regulation and Remote Sense sections for additional accuracy derating and conditions. | Tempco ± (% of voltage + offset)/°C, 0 °C to 55 °C | |
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Tcal ±5 °C [7] 7 Tcal is the internal device temperature recorded by the PXIe-4135 at the completion of the last self-calibration. | Tcal ±1 °C [7] | ||||
600 mV | 100 nV | 2 μV | 0.020% + 50 μV | 0.017% + 30 μV | 0.0005% + 1 μV |
6 V | 1 μV | 6 μV | 0.020% + 320 μV | 0.017% + 90 μV | |
20 V | 10 μV | 20 μV | 0.022% + 1 mV | 0.017% + 400 μV | |
200 V | 100 μV | 200 μV | 0.025% + 10 mV | 0.020% + 2.5 mV |
Current
Range | Resolution (noise limited) | Noise (0.1 Hz to 10 Hz, peak to peak), Typical | Accuracy (23 °C ±5 °C) ± (% of current + offset) [8]8 Relative humidity between 10% and 70%, noncondensing up to 35 °C. Derate max relative humidity 3% per °C for ambient temperatures between 35 °C and 50 °C. From 50 °C to 55 °C, relative humidity between 10% and 25%, noncondensing. , [9]9 Add 30 pA to accuracy specifications when operating with relative humidity greater than 50%. | Tempco ± (% of current + offset)/°C, 0 °C to 55 °C | |
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Tcal ±5 °C [10] 10 Tcal is the internal device temperature recorded by the PXIe-4135 at the completion of the last self-calibration. | Tcal ±1 °C [10] | ||||
10 nA 11 Under the following additional specification conditions: 10 PLC, 11-point median filter, measurements made within one hour after offset null. [11] , 12 Specifications in this row are typical for the following PXIe-4135 (20W) revisions: 157420C-03L, 157420D-03L and 157420E-03L. [12] | 10 fA | 150 fA [13]13 Measured with no connections to the PXIe-4135 (20W). | 0.06% + 2 pA | 0.05% + 750 fA | 0.0006% + 400 fA |
10 nA [14]14 Under default specification conditions. | 10 fA | 1 pA | 0.06% + 6 pA | 0.05% + 5 pA | 0.0006% + 400 fA |
1 μA | 100 fA | 4 pA | 0.03% + 100 pA | 0.022% + 40 pA | 0.0006% + 4 pA |
100 μA | 10 pA | 200 pA | 0.03% + 6 nA | 0.022% + 2 nA | 0.0006% + 200 pA |
1 mA | 100 pA | 2 nA | 0.03% + 60 nA | 0.022% + 20 nA | 0.0006% + 2 nA |
10 mA | 1 nA | 20 nA | 0.03% + 600 nA | 0.022% + 200 nA | 0.0006% + 20 nA |
100 mA | 10 nA | 200 nA | 0.03% + 6 μA | 0.022% + 2 μA | 0.0006% + 200 nA |
1 A | 100 nA | 2 μA | 0.04% + 60 μA | 0.035% + 20 μA | 0.0006% + 2 μA |
3 A [15]15 3 A range above 1 A is for pulsing only. | 1 μA | 20 μA | 0.08% + 900 μA | 0.075% + 600 μA | 0.0018% + 20 μA |
Noise
Wideband source noise | <25 mV peak-to-peak in 20 V range, device configured for normal transient response, 10 Hz to 20 MHz, typical |
Sinking Power vs. Ambient Temperature Derating
The following figure illustrates sinking power derating as a function of ambient temperature.
Output Resistance Programming Accuracy
Current Level/Limit Range | Programmable Resistance Range, Voltage Mode | Programmable Resistance Range, Current Mode | Accuracy ± (% of resistance setting), Tcal ±5 °C[16]16 Tcal is the internal device temperature recorded by the PXIe-4135 at the completion of the last self-calibration. |
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10 nA | 0 to ±500 MΩ | ±500 MΩ to ±infinity | 0.03% |
1 μA | 0 to ±5 MΩ | ±5 MΩ to ±infinity | |
100 μA | 0 to ±50 kΩ | ±50 kΩ to ±infinity | |
1 mA | 0 to ±5 kΩ | ±5 kΩ to ±infinity | |
10 mA | 0 to ±500 Ω | ±500 Ω to ±infinity | |
100 mA | 0 to ±50 Ω | ±50 Ω to ±infinity | |
1 A | 0 to ±5 Ω | ±5 Ω to ±infinity | |
3 A [17]17 3 A range above 1 A is for pulsing only. | 0 to ±500 mΩ | ±500 mΩ to ±infinity |
Overvoltage Protection
Accuracy[18]18 Overvoltage protection accuracy is valid with an ambient temperature of 23 °C ± 5 °C and with Tcal ±5 °C. Tcal is the internal device temperature recorded by the PXIe-4135 at the completion of the last self-calibration. (% of OVP limit + offset) | 1% + 200 mV, typical |
Temperature coefficient (% of OVP limit + offset)/°C | 0.01% + 3 mV/°C, typical |
Measurement location | Local sense |
Maximum OVP limit value | 210 V |
Minimum OVP limit value | 2 V |
Pulsed Operation
Dynamic load, minimum pulse cycle time[19]19 For example, given a continuous pulsing load, if the largest dynamic step in current that the load sources/sinks is from 0.5 A to 1.0 A, then the maximum SMU current step is 0.5 A. Thus, the minimum dynamic load pulse cycle time is 50 μs. Minimum dynamic load pulse cycle time is independent of output voltage.[20]20 Measurable unit of μs/A is used because the minimum pulse cycle time is independent of output voltage | 100 μs/A |
The following figure visually explains the terms used in the extended range pulsing sections.
Extended Range Pulsing for PXIe-4135 (40W)
The following figures illustrate the maximum pulse on time and duty cycle for the PXIe-4135 (40W) in a ≥58 W cooling slot, for a desired pulse voltage and pulse current given zero bias voltage and current. The shaded areas allow for a quick approximation of output limitations and limiting parameters. Actual limits are described by equations in Table 6. PXIe-4135 (40W) Pulse Level Limits .
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Specification | Value | Equation | |
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Maximum voltage, VpulseMax | 160 V | — | |
Maximum current, IpulseMax | 3 A | — | |
Maximum on time, tonMax[21]21 Pulse on time is measured from the start of the leading edge to the start of the trailing edge. See Figure 8. Definition of Pulsing Terminology. | If Ipulse > 1 A and ≥58 W Slot Cooling Capacity Chassis | Calculate using the equation or refer to Figure 9. Pulse On-time vs Pulse Current and Pulse Voltage to estimate the value. | (Equation 1) |
If Ipulse > 1 A and <58 W Slot Cooling Capacity Chassis | Calculate using the equation. |
(Equation 2) |
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If Ipulse ≤ 1 A | tonMax = 167 s | — | |
Maximum pulse energy, EpulseMax[22]22 Refer to Figure 9. Pulse On-time vs Pulse Current and Pulse Voltage to estimate the value and determine the limiting equation for a PXIe-4135 (40W) in a ≥58 W Slot Cooling Capacity Chassis. | 0.4 J |
(Equation 3) |
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Maximum duty cycle, DMax[23]23 Refer to Figure 10. Duty Cycle vs Pulse Current and Pulse Voltage to estimate the value and determine the limiting equation for a PXIe-4135 (40W) in a ≥58 W Slot Cooling Capacity Chassis. If D≥100%, consider switching Output Function from Pulse mode to DC mode. | If ≥58 W Slot Cooling Capacity Chassis | Calculate using the equation or refer to Figure 10. Duty Cycle vs Pulse Current and Pulse Voltage to estimate the value. |
(Equation 4) |
If <58 W Slot Cooling Capacity Chassis | Calculate using the equation. |
(Equation 5) |
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Minimum pulse cycle time, tcycleMin | 5 ms |
(Equation 6) |
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Maximum cycle average power, PCAMax[24]24 Refer to Figure 10. Duty Cycle vs Pulse Current and Pulse Voltage to estimate the value and determine the limiting equation for a PXIe-4135 (40W) in a ≥58 W Slot Cooling Capacity Chassis. | ≥58 W Slot Cooling Capacity Chassis | 20 W |
(Equation 7) |
<58 W Slot Cooling Capacity Chassis | 10 W |
Extended Range Pulsing for PXIe-4135 (20W)
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Transient Response and Settling Time
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Maximum slew rate[28]28 Optimize transient response, overshoot, and slew rate with NI SourceAdapt by adjusting the Transient Response. , [29]29 To improve the slew rate, see Examples of Determining Extended Range Pulse Parameters and Optimizing Slew Rate using NI SourceAdapt. | 0.5A/μs | ||||||||||||
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Load Regulation
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Current, device configured for local or remote sense | Load regulation effect included in current accuracy specifications, typical |
Expected Relay Life
Output Connected | ≥100 k cycles |
Measurement and Update Timing Characteristics
Available sample rates[34]34 When sourcing while measuring, both the Source Delay and Aperture Time affect the sampling rate. When taking a measure record, only the Aperture Time affects the sampling rate. | (1.8 MS/s)/N where N = 1, 2, 3, … 224, nominal | ||||||||||||||||||
Sample rate accuracy | Equal to PXIe_CLK100 accuracy, nominal | ||||||||||||||||||
Maximum measure rate to host | 1.8 MS/s per channel, continuous, nominal | ||||||||||||||||||
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Remote Sense
Voltage accuracy | Add 3 ppm of voltage range per volt of HI lead drop plus 1 μV per volt of lead drop per Ω of corresponding sense lead resistance to voltage accuracy specifications |
Maximum sense lead resistance | 100 Ω |
Maximum lead drop per lead | 3 V, maximum 202 V between HI and LO terminals |
Safety Interlock
The safety interlock feature is designed to prevent users from coming in contact with hazardous voltage generated by the SMU in systems that implement protective barriers with controlled user access points.
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Examples of Calculating Accuracy Specifications
Example 1: Calculating 5 °C Accuracy
Calculate the accuracy of 900 nA output in the 1 µA range under the following conditions:
Ambient temperature | 28 °C |
Internal device temperature | within Tcal ±5 °C[40]40 Tcal is the internal device temperature recorded by the PXIe-4135 at the completion of the last self-calibration. |
Self-calibration | within the last 24 hours |
Solution: Because the device internal temperature is within Tcal ±5 °C and the ambient temperature is within 23 °C ±5 °C, the appropriate accuracy specification is the following value:
0.03% + 100 pA
Calculate the accuracy using the following formula:
Therefore, the actual output is within 370 pA of 900 nA.
Example 2: Calculating Remote Sense Accuracy
Calculate the remote sense accuracy of 500 mV output in the 600 mV range. Assume the same conditions as in Example 1, with the following differences:
HI path lead drop | 3 V |
HI sense lead resistance | 2 Ω |
LO path lead drop | 2.5 V |
LO sense lead resistance | 1.5 Ω |
Solution: Because the device internal temperature is within Tcal ±5 °C and the ambient temperature is within 23 °C ±5 °C, the appropriate accuracy specification is the following value:
0.02% + 50 μV
Because the device is using remote sense, use the following remote sense accuracy specification:
Add 3 ppm of voltage range per volt of HI lead drop plus 1 μV per volt of lead drop per Ω of corresponding sense lead resistance to voltage accuracy specifications.
Calculate the remote sense accuracy using the following formula:
Therefore, the actual output is within 165.15 µV of 500 mV.
Example 3: Calculating Accuracy with Temperature Coefficient
Calculate the accuracy of 900 nA output in the 1 µA range. Assume the same conditions as in Example 1, with the following differences:
Ambient temperature | 15 °C |
Solution: Because the device internal temperature is within Tcal ±5 °C, the appropriate accuracy specification is the following value:
0.03% + 100 pA
Because the ambient temperature falls outside of 23 °C ±5 °C, use the following temperature coefficient per °C outside the 23 °C ±5 °C range:
0.0006% + 4 pA
Calculate the accuracy using the following formula:
Therefore, the actual output is within 398.2 pA of 900 nA.
Examples of Determining Extended Range Pulse Parameters and Optimizing Slew Rate using NI SourceAdapt
Example 1: Determining Extended Range Pulse On Time and Duty Cycle Parameters for the PXIe-4135 (40W)
Determine the extended range pulsing parameters, assuming the following operating point.
Output function | Pulse Current |
Pulse voltage limit, Vpulse | 80 V |
Pulse current level, Ipulse | 3 A |
Bias voltage limit, Vbias | 0.1 V |
Bias current level, Ibias | 0 A |
Pulse on time, ton | 1.5 ms |
Chassis' slot cooling capacity | ≥58 W |
Solution
Begin by calculating the pulse power using the following equation.
For PXIe-4135 (40W), refer to the following figures to identify next steps. First, verify the the region of operation using Figure 1, which shows 240 W is in the extended range pulsing region.
Next, refer to Figure 9. Pulse On-time vs Pulse Current and Pulse Voltage, which shows the maximum pulse on time, ton, is limited by the maximum pulse energy, EpulseMax. Use the pulse energy equation (Equation 3) from Table 6. PXIe-4135 (40W) Pulse Level Limits to calculate the maximum pulse on time, tonMax(Equation 8).
Next, refer to Figure 10. Duty Cycle vs Pulse Current and Pulse Voltage, which shows the maximum duty cycle, D, is limited by the cycle average power, PCA.If the required pulse on time is 1.5 ms and the module is installed in a chassis with slot cooling capacity ≥58 W, use the cycle average power equation (Equation7) from Table 6. PXIe-4135 (40W) Pulse Level Limits to calculate the minimum pulse off time, toffMin(Equation 9).
Finally, verify that the pulse cycle time, tcycle, is greater than or equal to the minimum pulse cycle time, tcycleMin (5 ms). To calculate the pulse cycle time, use the following equation:
In this case, the pulse cycle time meets the minimum pulse cycle time specification.
Therefore, a 80 V, 3 A pulse with an on time of 1.5 ms and a pulse off time of 16.5 ms is supported, since it fulfills the following criteria:
- Greater than the minimum pulse on time of 10 μs
- Equal to the minimum pulse off time of 16.5 ms to meet maximum cycle average power
- Greater than the minimum pulse cycle time of 5 ms
Example 2: Determining Extended Range Pulse On Time and Duty Cycle Parameters for the PXIe-4135 (20W)
Determine the extended range pulsing parameters, assuming the following operating point.
Output function | Pulse Current |
Pulse voltage limit, Vpulse | 80 V |
Pulse current level, Ipulse | 3 A |
Bias voltage limit, Vbias | 0.1 V |
Bias current level, Ibias | 0 A |
Pulse on time, ton | 1.5 ms |
Chassis' slot cooling capacity | ≥58 W |
Solution
Begin by calculating the pulse power using the following equation.
Since the pulse power of 240 W is within the 480 W region of Figure 2. Quadrant Diagram for PXIe-4135 (20W), the maximum configurable on time is 400 μs and maximum duty cycle is 2%.
For example, if the required pulse on time is 100 μs, and the required pulse cycle time is 10 ms, calculate the pulse off time and verify the duty cycle using the following equations.
Therefore, a pulse with an on time of 100 μs and 1% duty cycle would be supported, since it fulfills the following criteria:
- Greater than the minimum pulse on time of 50 μs
- Less than the maximum pulse on time of 400 μs and duty cycle of 2%
- Greater than the minimum pulse cycle time of 5 ms
Example 3: Using NI SourceAdapt to Increase the Slew Rate of the Pulse
Determine the appropriate operating parameters and custom transient response settings, assuming the following example parameters.
Output function | Pulse Current |
Pulse voltage limit, Vpulse | 160 V |
Pulse current level, Ipulse | 3 A |
Bias voltage limit, Vbias | 0.1 V |
Bias current level, Ibias | 0 A |
Transient response | Fast |
Load, cable impedance | 22.3 Ω, 1.8 μH |
Pulse on time, ton | 10 μs |
Pulse off time, toff | 4.99 ms |
The SMU Transient Response can be configured to three predefined settings, Slow, Normal, and Fast. If these settings do not provide the desired pulse response, a fourth setting, Custom, enables NI SourceAdapt[41]41 Visit ni.com for more information about NI SourceAdapt Next-Generation SMU Technology. technology which provides the ability to customize the SMU response to any load, and achieve an ideal response with minimum rise times and no overshoots or oscillations.
Solution
SourceAdapt allows users to set the desired gain bandwidth, compensation frequency, and pole-zero ratio through custom transient response to obtain the desired pulse waveform. To use SourceAdapt, first set the Transient Response to Custom.
To achieve the resulting waveform in the following figure, use the parameters in the following table.
Transient response | Custom |
Current: Gain bandwidth | 900 kHz |
Current: Compensation frequency | 200 kHz |
Current: Pole-zero ratio | 2 |
Gain bandwidth is directly proportional to the step response slew rate. The higher the gain bandwidth, the higher the slew rate. It is worth noting that increasing the gain bandwidth will likely increase ringing. However, this can likely be removed by appropriately setting the compensation frequency and the pole-zero ratio.
Compensation frequency and pole-zero ratio are used to determine the frequencies of the SMU control loop pole and zero, which can be used to optimize the system transient response by increasing phase margin and reducing ringing. To reduce the overshoot, it is recommended to set the compensation frequency close to the overshoot ringing frequency, see Fc in the figure above, and set the pole-zero ratio to be greater than 1.
For reference, the pole frequency and zero frequency are derived by the following equations.
These settings can be accessed through the Transient Response set to Custom: Voltage or Current.
Trigger Characteristics
Input triggers
Types | Start, Source, Sequence Advance, Measure, Pulse | ||||||
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Output triggers (events)
Types | Source Complete, Sequence Iteration Complete, Sequence Engine Done, Measure Complete, Pulse Complete, Ready for Pulse | ||||||
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Protection
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Safety Voltage and Current
DC voltage | ±200 V | ||||||
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Measurement Category I is for measurements performed on circuits not directly connected to the electrical distribution system referred to as MAINS voltage. MAINS is a hazardous live electrical supply system that powers equipment. This category is for measurements of voltages from specially protected secondary circuits. Such voltage measurements include signal levels, special equipment, limited-energy parts of equipment, circuits powered by regulated low-voltage sources, and electronics.
DC current range | ±1 A; ±3 A, pulse only |
Guard Output Characteristics
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Calibration Interval
Recommended calibration interval | 1 year |
Power Requirement
PXIe-4135 (40W) | 3.0 A from the 3.3 V rail and 6.0 A from the 12 V rail |
PXIe-4135 (20W) | 2.5 A from the 3.3 V rail and 2.7 A from the 12 V rail |
Physical
Dimensions | 3U, one-slot, PXI Express/CompactPCI Express module 2.0 cm × 13.0 cm × 21.6 cm (0.8 in. × 5.1 in. × 8.5 in.) | ||||||
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Front panel connectors | 2 × 3 lug triaxial connectors, 1 × 4.08 mm (3 position) combicon |
Environmental Characteristics
Operating | 0 °C to 55 °C |
Storage | -40 °C to 71 °C |
Operating | 10% to 90%, noncondensing |
Storage | 5% to 95%, noncondensing |
Pollution degree | 2 |
Maximum altitude | 2,000 m (800 mbar) (at 25 °C ambient temperature) |
Operating vibration | 5 Hz to 500 Hz, 0.3 g RMS |
Non-operating vibration | 5 Hz to 500 Hz, 2.4 g RMS |
Operating shock | 30 g, half-sine, 11 ms pulse |
1 The ambient temperature of a PXI system is defined as the temperature at the chassis fan inlet (air intake).
2 For increased capability, NI recommends installing the PXIe-4135 (40W) in a chassis with slot cooling capacity ≥58 W.
3 Voltage levels and limits >|40 VDC| require the safety interlock input to be closed.
4 Current is limited to 1 A DC. Higher levels are pulsing only.
5 Power limit defined by voltage measured between HI and LO terminals.
6 Accuracy is specified for no load output configurations. Refer to Load Regulation and Remote Sense sections for additional accuracy derating and conditions.
7 Tcal is the internal device temperature recorded by the PXIe-4135 at the completion of the last self-calibration.
8 Relative humidity between 10% and 70%, noncondensing up to 35 °C. Derate max relative humidity 3% per °C for ambient temperatures between 35 °C and 50 °C. From 50 °C to 55 °C, relative humidity between 10% and 25%, noncondensing.
9 Add 30 pA to accuracy specifications when operating with relative humidity greater than 50%.
10 Tcal is the internal device temperature recorded by the PXIe-4135 at the completion of the last self-calibration.
11 Under the following additional specification conditions: 10 PLC, 11-point median filter, measurements made within one hour after offset null.
12 Specifications in this row are typical for the following PXIe-4135 (20W) revisions: 157420C-03L, 157420D-03L and 157420E-03L.
13 Measured with no connections to the PXIe-4135 (20W).
14 Under default specification conditions.
15 3 A range above 1 A is for pulsing only.
16 Tcal is the internal device temperature recorded by the PXIe-4135 at the completion of the last self-calibration.
17 3 A range above 1 A is for pulsing only.
18 Overvoltage protection accuracy is valid with an ambient temperature of 23 °C ± 5 °C and with Tcal ±5 °C. Tcal is the internal device temperature recorded by the PXIe-4135 at the completion of the last self-calibration.
19 For example, given a continuous pulsing load, if the largest dynamic step in current that the load sources/sinks is from 0.5 A to 1.0 A, then the maximum SMU current step is 0.5 A. Thus, the minimum dynamic load pulse cycle time is 50 μs. Minimum dynamic load pulse cycle time is independent of output voltage.[20]20 Measurable unit of μs/A is used because the minimum pulse cycle time is independent of output voltage
20 Measurable unit of μs/A is used because the minimum pulse cycle time is independent of output voltage
21 Pulse on time is measured from the start of the leading edge to the start of the trailing edge. See Figure 8. Definition of Pulsing Terminology.
22 Refer to Figure 9. Pulse On-time vs Pulse Current and Pulse Voltage to estimate the value and determine the limiting equation for a PXIe-4135 (40W) in a ≥58 W Slot Cooling Capacity Chassis.
23 Refer to Figure 10. Duty Cycle vs Pulse Current and Pulse Voltage to estimate the value and determine the limiting equation for a PXIe-4135 (40W) in a ≥58 W Slot Cooling Capacity Chassis. If D≥100%, consider switching Output Function from Pulse mode to DC mode.
24 Refer to Figure 10. Duty Cycle vs Pulse Current and Pulse Voltage to estimate the value and determine the limiting equation for a PXIe-4135 (40W) in a ≥58 W Slot Cooling Capacity Chassis.
25 Pulse on time is measured from the start of the leading edge to the start of the trailing edge. See Figure 8. Definition of Pulsing Terminology.
26 Time to recover within 0.1% of voltage range after a load current change from 10% to 90% of range, device configured for fast transient response.
27 Measured with guarded load and HI/Sense HI triax cable ≤ 3 m
28 Optimize transient response, overshoot, and slew rate with NI SourceAdapt by adjusting the Transient Response.
29 To improve the slew rate, see Examples of Determining Extended Range Pulse Parameters and Optimizing Slew Rate using NI SourceAdapt.
30 Measured as the time to settle to within 0.1% of step amplitude, device configured for fast transient response.
31 Current limit set to ≥60 μA and ≥60% of the selected current limit range.
32 Current limit set to ≥20 μA and ≥20% of selected current limit range.
33 Voltage limit set to ≥2 V, resistive load set to 1 V/selected current range.
34 When sourcing while measuring, both the Source Delay and Aperture Time affect the sampling rate. When taking a measure record, only the Aperture Time affects the sampling rate.
35 As the source delay is adjusted or if advanced sequencing is used, maximum source rates vary. Timed output mode is enabled in Sequence Mode by setting Sequence Step Delta Time Enabled to True. Additional timing limitations apply when operating in pulse mode (Output Function is set to Pulse Voltage or Pulse Current).
36 Pulse mode is enabled when the Output Function is set to Pulse Voltage or Pulse Current. This mode enables access to extended range pulsing capabilities. For PXIe-4135 (20W), shorter minimum on times for in-range pulses can be achieved using Sequence mode or Timed Output mode with the Output Function set to Voltage or Current.
37 Pulse on time is measured from the start of the leading edge to the start of the trailing edge. See Figure 8. Definition of Pulsing Terminology.
38 Optimize transient response, overshoot, and slew rate with NI SourceAdapt by adjusting the Transient Response.
39 Pulses fall inside DC limits. Pulse off time is measured from the start of the trailing edge to the start of a subsequent leading edge.
40 Tcal is the internal device temperature recorded by the PXIe-4135 at the completion of the last self-calibration.
41 Visit ni.com for more information about NI SourceAdapt Next-Generation SMU Technology.
42 Pulse widths and logic levels are compliant with PXI Express Hardware Specification Revision 1.0 ECN 1.
43 Input triggers can be re-exported.