NI-9475 8-Channel 60 V Sourcing Digital Output Module
Земля NI-9475 is an eight-channel C Series sourcing digital output module designed to control higher-voltage industrial loads. Each channel can source as much as 1 A continuously at external supply voltages up to 60 VDC.
With a maximum full-load output delay of 1 µs, the NI-9475 provides significantly faster switching than many general-purpose industrial output modules. Typical loads include solenoids, relays, lamps, actuators and compatible DC motors.
Key Features of the NI-9475
- Eight sourcing digital output channels
- 0 VDC to 60 VDC external supply range
- 1 A maximum continuous current per channel
- 1 µs maximum full-load output delay
- 0.14 Ω maximum output impedance
- Solid-state switching
- Outputs default to OFF at power-up
- Short-circuit trip behavior
- Channel-to-earth-ground isolation
- D-Sub front connection
- Standard and conformal-coated versions
- -40°C to 70°C operating range
NI-9475 Technical Specifications
| Product Model | NI-9475 |
|---|---|
| Product Type | High-speed C Series digital output module |
| Number of Output Channels | 8 |
| Тип вывода | Источники |
| External Supply Range | 0 VDC to 60 VDC |
| Continuous Output Current | 1 A maximum per channel |
| Maximum Output Impedance | 0.14 Ω |
| Maximum Output Delay | 1 µs at full load |
| Power-On State | All channels OFF |
| Maximum Working Voltage | 60 VDC, Measurement Category I |
| Short-Circuit Trip Time | 10 µs at approximately 13 A |
| Channel-to-Channel Isolation | Ничего |
| Channel-to-Earth Isolation | 60 VDC continuous, CAT I |
| Isolation Withstand | 1,000 Vrms for 5 seconds |
| Operating Temperature | -40°C to 70°C |
60 VDC Output Capability
The NI-9475 supports load supplies up to 60 VDC, making it suitable for equipment that operates above conventional 24 V industrial logic levels. It is intended for Measurement Category I signal circuits and must not be connected directly to building mains.
1 A Sourcing Outputs
Each channel can source up to 1 A continuously under the specified conditions. The load must be connected between the selected DO terminal and COM, while the external power supply connects to Vsup and COM.
Check total system power, connector capacity, wiring gauge and chassis thermal conditions when several channels carry substantial current simultaneously.
High-Speed 1 µs Switching
The 1 µs output response supports faster control and pulse generation than the NI-9472. Actual waveform quality depends on the CompactDAQ or CompactRIO chassis, software mode, load impedance and external wiring.
Protection and Load Design
The NI-9475 includes short-circuit trip behavior at high fault currents, but currents between the continuous rating and trip region can damage the module. External fusing and current limiting should be included where a source can deliver high fault energy.
NI-9475 Part Number and Accessories
| Part Number | Описание |
|---|---|
| 780132-01 | NI-9475 standard D-Sub version |
| 780132-02 | NI-9475 conformal-coated D-Sub version |
| D-Sub Cable | Connects the module to a terminal block or custom test fixture |
| D-Sub Terminal Block | Provides field wiring access for Vsup, COM and output channels |
| External DC Supply | Provides 0 VDC to 60 VDC load power |
| Transient Suppression | Protects outputs when controlling inductive loads |
NI-9475 Applications
- High-speed solenoid control
- Relay and contactor operation
- DC actuator control
- Lamp and indicator testing
- Automotive component testing
- Системы аппаратного моделирования
- Промышленное управление станками
- Production test fixtures
- Pulse-width-modulated control
- CompactRIO embedded control
Automotive and HIL Testing
The higher voltage and fast output response are useful for simulating controller outputs or driving test-fixture loads. External protection must be selected according to the available supply current and load energy.
Solenoid and Relay Control
The module can energize compatible coils directly when their voltage, steady-state current and inrush remain within specification. Install suppression close to the inductive load for effective transient control.
NI-9475 Installation Workflow
Step 1: Verify Load Ratings
Measure or obtain the load’s steady-state, inrush and turn-off characteristics before selecting the power supply and protection.
Step 2: Install the Module
Insert the NI-9475 into a compatible chassis while the external Vsup source is turned off.
Step 3: Connect the D-Sub Cable
Use an approved cable or correctly wired fixture and verify every D-Sub pin before applying power.
Step 4: Connect Vsup and COM
Observe polarity and keep the supply at or below 60 VDC.
Step 5: Add Load Protection
Install flyback diodes, snubbers or transient suppressors appropriate for each inductive load.
Step 6: Test Individual Outputs
Enable one channel at a time and monitor current, voltage drop and load operation before enabling the full sequence.
NI-9475 Troubleshooting
The output is enabled but no voltage appears
Check the external supply, Vsup connection, COM return and D-Sub pinout. The software state alone does not supply load power.
The module becomes hot
Measure current on every active channel and check chassis cooling. High current through several outputs increases module dissipation.
A motor causes unstable operation
Check startup current, commutation noise and transient suppression. The NI-9475 is not a complete motor drive and may require a dedicated driver.
An output fails after a wiring short
Review external fusing and current limiting. The internal trip characteristic does not protect against every intermediate overcurrent condition.
The output timing is slower than expected
Check the selected chassis, programming mode and software timing. Hardware response does not eliminate delays introduced by nondeterministic application code.
NI-9475 Comparison
| Модель | Primary Rating | Best Suited For |
|---|---|---|
| NI-9475 | 8 channels, 60 V, 1 A, 1 µs | Fast higher-voltage load control |
| NI-9472 | 8 channels, 30 V, 0.75 A, 100 µs | General 12 V and 24 V automation |
| NI-9474 | Fast 24 V sourcing output | High-speed conventional industrial logic |
| НИ-9476 | 32 sourcing outputs | High channel density |
| NI-9477 | 32 sinking outputs | Low-side switching architectures |
NI-9475 Frequently Asked Questions
How many output channels does the NI-9475 provide?
It provides eight sourcing digital output channels.
What is its maximum output voltage?
The external supply and output circuit can operate up to 60 VDC within Measurement Category I.
How much current can each channel provide?
Each channel is rated for up to 1 A of continuous output current.
Does the module generate its own load voltage?
No. It switches voltage supplied through the external Vsup connection.
Can it switch inductive loads?
Yes, when the load remains within specification and appropriate flyback or transient suppression is installed.
Request a Quote for the NI-9475
Contact us for availability and project pricing for the NI-9475 60 V sourcing digital output module. We can also help identify compatible D-Sub cables, terminal blocks, power supplies and alternative C Series output modules.
