The NI-9505 is a C Series full H-bridge drive for brushed DC servo motors. It connects directly to a brushed DC motor and supports incremental encoder feedback.
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Key product information and technical features.
The NI-9505 provides the motor-drive stage for brushed DC motion systems within the NI C Series ecosystem. Its direct motor connection and incremental encoder support distinguish it from modules intended for brushless or stepper motors.
Thermal integration matters when combining this drive with measurement modules. NI recommends separating analog modules from high-power-dissipating modules in high-power CompactRIO systems and identifies special current-derating considerations for the cRIO-9081 and cRIO-9082.
Verified product specifications.
| Motor type | Brushed DC servo |
|---|---|
| Output topology | Full H-bridge |
| Encoder feedback | Incremental |
| Maximum current at 40 °C without NI 9931 | 5 A |
| Maximum current at 40 °C with NI 9931 | 7.3 A |
| Maximum current at 70 °C, with or without NI 9931 | 1 A |
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Manufacturer
System platform and module family
Brushed DC motor drive with encoder feedback
NI 9931 screw-terminal accessory for increased current capability under specified thermal conditions.
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Product-specific answers based on available technical information.
The NI-9505 connects directly to brushed DC motors. It is not the NI 9502 brushless servo drive.
Yes. NI identifies the NI-9505 as a brushed DC motor drive with incremental encoder feedback support.
Yes. NI states that the published ambient-temperature/current curve is not valid for cRIO-9081/9082 systems and directs users to obtain chassis-specific guidance.