NI-9224 Getting Started
- Updated2022-09-14
- 4 minute(s) read
NI-9224 Getting Started
NI-9224 Pinout
Signal | Description |
---|---|
AI+ | Positive analog input signal connection |
AI- | Negative analog input signal connection |
NI-9224 Block Diagram
- Input signals on each channel are conditioned, buffered, and then sampled by an ADC.
- Each AI channel provides an independent signal path and ADC, enabling you to sample all channels simultaneously.
Timing Modes
The NI-9224 supports high resolution, medium resolution, high speed, and medium speed timing modes. High resolution timing mode optimizes noise and rejects power line frequencies. Medium resolution timing mode has a higher sample rate when compared with high resolution, and also rejects power line frequencies. High speed timing mode optimizes sample rate and signal bandwidth, whereas medium speed timing mode has lower noise when compared to high speed timing mode.
Grounded Connections
Make sure the voltage on the AI+ and AI- connections are in the channel-to-earth safety voltage range to ensure proper operation.
Floating Connections
NI-9224 Connection Guidelines
- Make sure that devices you connect to the NI-9224 are compatible with the module specifications.
- You must use 2-wire ferrules to create a secure connection when connecting more than one wire to a single terminal on the NI-9224.
Wiring the NI-9939
When connecting all 16 terminals, the total maximum wire diameter including insulation must not exceed 2.3 mm (0.09 in.) per wire in order to fit through the 11.0 mm (0.43 in.) opening on the NI-9939.
When connecting all 16 terminals using the cable retainer, the total maximum wire diameter including insulation must not exceed 1.6 mm (0.06 in.) per wire in order to fit under the 7.6 mm (0.30 in.) clearance of the NI-9939 cable retainer.
Complete the appropriate procedure based on the total maximum wire diameter used.
Installing the NI-9939
What to Use
- NI-9939 screw terminal connector backshell kit
- 0.05 mm2 to 1.5 mm2 (30 AWG to 14 AWG) wire with 6 mm (0.24 in.) of the insulation stripped
- Slotted screwdriver
What to Do
- Insert the stripped end of the wire fully into the appropriate terminal on the 16-Position Screw Terminal Connector (2) and tighten the screw. Make sure no exposed wire extends past the screw terminal.
- Route the wire through the NI-9939 opening and remove slack from the wiring.
- Install the Backshell Top Enclosure (1) to the Backshell Bottom Enclosure (3).
- Place the Label (5) in the Label Carrier (4) and attach onto the backshell.
Installing the NI-9939 Using the Cable Retainer
What to Use
- NI-9939 screw terminal connector backshell kit
- 0.05 mm2 to 1.5 mm2 (30 AWG to 14 AWG) wire with 6 mm (0.24 in.) of the insulation stripped
- Slotted screwdriver
What to Do
- Insert the stripped end of the wire fully into the appropriate terminal on the 16-Position Screw Terminal Connector (2) and tighten the screw. Make sure no exposed wire extends past the screw terminal.
- Route the wire through the NI-9939 opening, remove slack from the wiring, and secure wires using the Cable Retainer (6) and tighten the Screws (7).
- Install the Backshell Top Enclosure (1) to the Backshell Bottom Enclosure (3).
- Place the Label (5) in the Label Carrier (4) and attach onto the backshell.
High-Vibration Application Connections
If your application is subject to high vibration, NI recommends that you follow these guidelines to protect connections to the NI-9224:
- Use ferrules to terminate wires to the detachable connector.
- Use the NI-9939 screw terminal connector backshell kit.
Overvoltage Protection
The NI-9224 provides overvoltage protection for each channel.