II. Model Interpretation

PXI: 3U single slot, standard PXI bus (compatible with PXIe mixed slots)

6515: 651x industrial isolated DIO series, high current output + bidirectional input model

Architecture: 8 groups (Bank 0–7) × 8 channels, 250 Vrms isolation between groups

Part Number: 778964-01

Location: Preferred for high current NPN loads, complementary to PXI-6513/6514

III. Technical Parameters (25℃)

1. Digital Input (DI)

Channels: 32 bidirectional (Source/Sink configurable) NI

Voltage range: -30 VDC to +30 VDC NI

Logic threshold: High ≥ +11 V, Low ≤ +4 V (24 V industrial standard)

Input filtering: Software programmable 1 μs to 1 ms (debouncing / de-sagging) NI

Response delay: Typical 80 μs

2. Digital Output (DO)

Channels: 32 output injections (Sink/NPN) NI

Voltage range: 0 to 30 VDC

Drive capability: 500 mA/channel continuously (single channel maximum) NI

Isolation: 250 Vrms between groups (1 minute), common ground between channels NI

Power-on state: Programmable (all off / all on / hold) NI

Watchdog: Software failure automatic safe state (configurable) NI

3. Physical and Environmental

Size: 3U single slot (22×124×126 mm)

Operating temperature: 0 to 55℃ (Industrial extended -20 to 70℃ selectable)

Power consumption: Approximately 2.5 W (320 mA@+3.3 V, 260 mA@+5 V)

Calibration: No regular calibration required

IV. Interface and Communication Configuration

Front panel interface: 100-pin anti-idle SCSI female connector

Adapter cable: SH100-100, R1005050 (100-pin to 2×50-pin)

Terminal box: CB-100, SCB-100A (with isolation terminals)

Bus: PXI (PCI, trigger, 10 MHz reference clock)

Driver: NI-DAQmx 9.0+, supports LabVIEW, Python, C#, TestStand

Synchronization: PXI trigger bus, multi-module synchronous acquisition and control

V. Core Functions

32 DI bidirectional + 32 DO high-flow injection output: Single card monitoring 32 NPN/PNP sensors + drive 32 high-current NPN relays / SSR, 500 mA direct drive without amplification, group-to-group isolation to resist ground loop and high voltage interference NI.

Industrial-grade safety mechanism: Watchdog + programmable power-on + input filtering + change detection, software crash automatic protection, default safe state upon power-on, contact debouncing to prevent false triggering NI.

±30 V wide voltage bidirectional input: Compatible with NPN/PNP sensors, compatible with global 24 V industrial standard NI.

High-density single slot: 64 channels 3U single slot, saves chassis slots, suitable for large-scale I/O mixed systems.

Strong anti-interference isolation: 250 Vrms group-to-group isolation to prevent high voltage from entering the PXI system, protecting equipment and personnel safety NI.

VI. Application Scenarios

Industrial automation "Monitoring + High Current NPN Control": PLC expansion DIO, 24 V sensor acquisition + high-power NPN relays / valves control, production line status feedback + high-current actuator drive. Power and Energy System: Switch cabinet status monitoring + High current opening and closing control, Circuit breaker position feedback + Strong drive, Relay protection contact collection + High power execution circuit.

Automotive Electronic Testing: BCM analog quantity collection + High current load driving, Vehicle lights / Wiper / Door lock status monitoring + High power execution.

ATE and Test System: High power relay matrix monitoring + Control, Test fixture status collection + High current driving, Safety interlock signal closed loop.

Railway / Ship Control: Vehicle / Ship analog quantity monitoring + High current actuator control, Door control / Lighting / Alarm signal closed loop, High power integrated in harsh environment.

VII. Installation and Maintenance Instructions

Installation and Power On

Disconnect the power supply card, ensure the chassis is reliably grounded; Power on, NI-DAQmx self-checking, no preheating required.

Operating Temperature: 0–55℃, keep the air duct unobstructed, avoid overloading due to high temperature.

Wiring and Operation

Avoid frequent plugging and unplugging of 100-pin interface, recommended to use CB-100 isolation wiring box for intermediate transfer.

Input Voltage: ≤±30 V, Output current per channel ≤ 500 mA,严禁 short circuit； Use shielded twisted pair for long-distance， keep away from strong electricity / motors.

Filtering Time： Set according to contact characteristics (10–50 ms)， Watchdog timeout time set according to safety requirements (100–500 ms).

Daily Maintenance

Keep interfaces clean， prevent dust accumulation in long-term idle state； No calibration required， regularly check the tightness of wiring terminals.

Isolation Layer： Regular insulation test (250 Vrms/1 minute) to ensure isolation performance.