Channel & Physical Interface Configuration

• Motor Drive Interface: 4-pin screw terminal block for motor power (M+, M-) and external drive supply (VSUP, COM); matched with 14 AWG max copper wire
• Feedback & Safety Interface: 9-pin female D-Sub connector for differential A/B/Z encoder, 5 V encoder power and opto-isolated E-Stop input
• Front Panel Indicators: Module power LED, drive fault LED, encoder signal activity LED
• Physical Dimensions: Standard single-width C-series footprint, weight 155 g bare module, IP40 ingress protection
• Torque Specifications: Screw terminal torque 0.5-0.6 N·m; D-Sub flange locking torque 0.2 N·m

DC Motor Drive Core Electrical Parameters

• External Supply Range (VSUP): 8 VDC to 30 VDC continuous, absolute maximum transient withstand 32 VDC
• Continuous Output Current (Temperature Derated): 5 A @ 40 ℃, 1 A @ 70 ℃ bare module; 7.3 A @ 40 ℃ with NI-9931 terminal accessory
• Peak Output Current: 12 A maximum, limited to 2-second pulse duration with minimum 3.4 s cooling interval between pulses
• PWM Switching Frequency: 20 kHz default recommended, user configurable up to 40 kHz; minimum high/low pulse width 2 μs
• Drive Latency: 20 μs maximum direction/current loop update latency for deterministic motion response
• Minimum Motor Inductance: 500 μH, preventing current oscillation for low-inductance miniature motors

Onboard Current Sensing & Protection Logic

• Current Acquisition Performance: 12-bit ADC resolution, ±12.7 A full-scale sensing range, synchronous sampling with PWM cycle
• Undervoltage Protection: Automatic drive shutdown when VSUP drops below 6 VDC to avoid motor torque loss
• Overvoltage & Reverse Polarity: Withstand -30 V reverse supply and 32 V overvoltage without permanent damage
• Short-Circuit Protection: Native hardware protection for motor-to-ground and motor-to-VSUP short faults
• Over-Temperature Trip: Internal junction temperature threshold 115 ℃, latched fault alarm requiring power cycle reset

Incremental Encoder Input Specifications

• Input Mode: Dual-mode single-ended TTL or differential line driver quadrature input
• Max Quadrature Frequency: 5 MHz, supporting high-speed low-inertia motor rotation measurement
• Differential Electrical Index: ±700 mV differential threshold, -7 V to +12 V common-mode input range
• Single-Ended Logic Threshold: VIL ≤0.8 V, VIH ≥2.4 V, ±1 mA typical input sink current
• Encoder Auxiliary Power: Regulated 5 V ±5% output, 125 mA maximum supply capacity for encoder power

Emergency Stop (E-Stop) Safety Input

• Isolation Grade: Optically isolated from motor drive circuit, preventing high-power circuit backfeed damage
• Voltage Threshold: Logic OFF 0-2 V, Logic ON 3.5-30 V, compatible with universal safety relay outputs
• Input Turn-On Current: 500 μA typical, 1 mA maximum, compatible with passive dry contact signals
• Fault Response: Immediate H-bridge braking shutdown within 35 μs once E-Stop triggered

Isolation & Safety Compliance Ratings

• Channel-to-Earth Isolation: 60 VDC continuous withstand, 750 Vrms 5-second dielectric withstand test
• Internal Isolation Layout: No channel-to-channel isolation; only field-side to chassis backplane isolation
• Measurement Category: CAT I only, strictly prohibited for direct mains-connected circuit measurement
• Hazardous Location Certification: UL/ATEX/IECEx certified for Class I Division 2, Zone 2 IIC T4 explosive environments
• Pollution Degree: Rated Pollution Degree 2, indoor controlled dry environment only

Power Consumption & Environmental Specifications

• Backplane Power Draw: 100 mW max active mode, 0.4 mW sleep standby power consumption
• Thermal Dissipation: 1.5 W maximum heat dissipation at 70 ℃ full-load operation
• Operating Temperature: -40 ℃ ~ +70 ℃; Storage Temperature: -40 ℃ ~ +85 ℃
• Humidity: 10%-90% RH non-condensing operation, 5%-95% RH non-condensing storage
• Shock & Vibration: 30 g half-sine operational shock, 5 grms 10-500 Hz random vibration
• MTBF: 821,178 hours @ 25 ℃ ambient temperature under Bellcore reliability standards

Compatibility Matching List

• Compatible Chassis: All CompactRIO cRIO-903x/904x/905x, CompactDAQ cDAQ-917x/918x series C-series chassis
• Matching Accessories: NI-9931 screw terminal backshell, shielded DB9 encoder cable, motor twisted pair shielded wire
• Peer Module Synchronization: Synchronizable with other C-series motion modules via chassis trigger bus
• Official Status: Fully end-of-life, no official production, only aftermarket inventory and third-party repair available

Software Compatibility

• Required Drivers: NI-RIO, NI-DAQmx, NI-Motion embedded motion driver suite
• Configuration Tools: NI MAX, CompactRIO Motion Configuration Utility
• Development Software: LabVIEW Real-Time, LabVIEW FPGA, LabWindows/CVI
• Supported OS: NI Linux Real-Time, Windows 10 remote development; no Windows 11 native driver support

Pros & Limitations

• Limitations: No channel-to-field galvanic isolation, strict temperature-dependent current derating, incompatible with brushless motors, only CAT I low-voltage use, NI-Motion driver deprecated in LabVIEW 2022+
• Pros: All-in-one drive/encoder/safety circuit, sub-35μs emergency stop response, native current closed-loop control, wide rugged temperature range, ATEX explosive environment certification, ultra-low backplane power consumption
• Limitations: No channel-to-field galvanic isolation, strict temperature-dependent current derating, incompatible with brushless motors, only CAT I low-voltage use, NI-Motion driver deprecated in LabVIEW 2022+

Official Product Images & Visual Reference

• Front Official Render: Standard grey C-series shell, top-side DB9 female encoder port, side screw terminal motor port, three front-panel status LEDs(PWR/FLT/ENC)
• Physical Bare Module Photo: Internal PCB layout, H-bridge power chip, isolated E-stop optocoupler and current sampling resistor layout
• Assembly Photo: NI-9505 installed with NI-9931 terminal backshell, matched shielded motor and encoder wiring
• Image Source: NI official manual 374211h, verified first-hand factory photos without watermark