NI PXI-1031

Core Technical & Performance Specifications

1. Slot Layout: Total 4 slots, 1 dedicated PXI system controller slot + 3 peripheral signal I/O slots
2. Backplane Clock & Trigger: Onboard low-jitter 10 MHz system reference clock; full PXI star trigger bus, local bus, trigger routing bus
3. Electrical Power Input:
   • AC Input Voltage: 100–240 VAC universal range, operating tolerance 90–264 VAC
   • Input Frequency: 50/60 Hz nominal, operable band 47–63 Hz
   • Rated Input Current: 2A–4A
   • Power Supply Efficiency: ≥70% under full rated load
   • DC Backplane Rails: +3.3 V, +5 V, ±12 V; line regulation ≤±0.2% for 3.3 V, ≤±0.1% for 5 V/±12 V
4. Cooling & Acoustic Noise: AUTO/HIGH two-speed fan control; minimum acoustic noise 35 dBA at AUTO low-speed mode (ISO 7779 standard measurement)
5. Environmental Operating Range: 0 °C to 55 °C ambient temperature; 10%–90% non-condensing relative humidity; maximum operating altitude 2000 m
6. Physical Dimensions & Weight: Width 257.1 mm, Height 177 mm, Depth 340 mm; total unit weight 5 kg

Key Functional Features

1. Dual fan speed control: AUTO mode dynamically adjusts fan speed based on intake air temperature to minimize audible noise; HIGH mode locks full fan speed for high-power module full-load operation
2. Front-panel momentary standby power switch for convenient system power cycling without AC cable disconnection
3. Full compatibility with all 3U PXI Rev2.2 and CompactPCI PICMG 2.0 R3.0 modules
4. Integrated complete PXI synchronization infrastructure: 10 MHz shared clock, star trigger, local inter-slot communication bus
5. Optional mechanical accessories: Portable carrying handle kit, rack-mount bracket kit for standard 19-inch industrial equipment cabinets, rubber anti-slip bottom feet
6. Full short-circuit, overload, overvoltage protection for all backplane DC power rails
7. System configuration fully supported by NI MAX (Measurement & Automation Explorer) software, automatic generation of pxisys.ini system definition file for hardware identification and resource allocation

Working Principle

1. AC mains power enters the integrated internal switching power supply unit, converts universal AC input to stabilized multi-channel DC power rails for the PXI backplane circuit board
2. The backplane PCB distributes DC power, PCI bus data lines, 10 MHz reference clock signals, and multi-layer trigger bus signals to every installed peripheral module slot
3. Built-in temperature sensor continuously samples chassis intake air temperature to control fan speed logic circuit, automatically increasing fan rotation speed when internal temperature rises above predefined threshold
4. The front-panel power switch acts as secondary control logic to cut DC power output to the backplane without disconnecting the main AC input cable
5. The 10 MHz low-jitter clock oscillator distributes synchronous timing reference to all slots to enable multi-module time-aligned synchronized measurement and control operations

Structure & Material Composition

1. Outer Enclosure Main Body: Sheet aluminum formed frame + cold-rolled steel side panels
2. Surface Finishing: Aluminum components treated with clear chromate conversion coating; steel panels electrodeposited nickel plating + polyester urethane powder paint for corrosion resistance
3. Backplane Bare Circuit Board: UL 94 V-0 flame retardant FR4 PCB material
4. Backplane Slot Connectors: IEC 917 & IEC 1076-4-101 compliant gold-plated connectors, UL94 V-0 rated plastic housing
5. Internal Cooling Fan: Plastic fan housing, aluminum fan blades, brushless DC motor
6. Hardware Fasteners & Internal Brackets: Extruded aluminum support frames, nylon plastic filler panels for empty slots

Installation Mandatory Requirements

1. Mechanical Installation Rules
   • Desktop placement: Install all four rubber anti-slip feet to chassis bottom surface to ensure stable placement and bottom airflow clearance
   • 19-inch rack mounting: Must use official NI rack-mount accessory kit; install filler panels on all empty unused slots to maintain uniform forced-air cooling airflow
   • Portable mobile use: Mount optional carrying handle kit on chassis side panels; avoid tilting chassis more than 15 degrees during operation
2. Electrical Installation Rules
   • Connect chassis to reliable protective earth ground via rear-panel chassis ground screw to eliminate ESD and EMI interference
   • Only use factory-provided matched AC power cable compatible with local mains socket standards (NEMA 5-15, SEV, AS C112 regional variants)
   • Install modules only when chassis main AC power is fully disconnected; insert modules fully into backplane slot connectors and fasten front-panel retention screws tightly
3. Software Installation Rules
   • Install NI DAQmx base driver suite and NI MAX configuration software on host control PC before powering on the chassis
   • Complete hardware self-test and resource mapping inside NI MAX after first power-up

Strict Usage Precautions

1. Thermal & Cooling Precautions
   • Never block front intake air vents or rear exhaust vents; maintain minimum 100 mm clearance at chassis rear for hot air exhaust
   • Always install plastic filler panels on every empty slot; missing filler panels disrupt internal airflow, causing module overheating and shortened hardware service life
   • When operating multiple high-power modules simultaneously, manually switch fan to HIGH speed mode to prevent thermal throttling
2. Electrical Safety Precautions
   • Disconnect main AC power cable before inserting, removing, or reconfiguring any PXI peripheral modules to avoid backplane short-circuit damage
   • Do not connect AC mains power with damaged, frayed, or improperly terminated power cables; damaged cables create electric shock and fire hazards
   • Avoid operating the chassis in environments with conductive dust, liquid splashes, or high humidity exceeding 90% non-condensing rating
3. Mechanical & Storage Precautions
   • Handle chassis with care; avoid dropping or heavy impact, which can crack the backplane PCB or damage gold-plated slot connectors
   • When storing chassis long-term, remove all installed modules, place chassis in dry, temperature-controlled storage space with humidity between 20%–60%
   • Clean chassis exterior only with dry soft microfiber cloth; never use liquid cleaning solvents or compressed air to blow internal backplane circuits
4. ESD Protection Precautions
   • Always wear certified ESD grounding wrist strap when handling internal modules or chassis backplane components
   • Touch chassis rear-panel ground screw to dissipate static charge before touching any exposed circuit board or connector pins

Target Application Scenarios

1. Educational laboratory teaching platforms for university electrical engineering, automation, and test measurement courses
2. Low-noise desktop small-scale automated functional test systems for consumer electronics PCBA validation
3. Portable field measurement test equipment for low-channel-count sensor data acquisition
4. Small industrial bench process control systems with limited I/O channel requirements
5. Research laboratory low-power signal characterization and sensor calibration test benches