II. Model Interpretation

PXI: 3U single slot, standard PXI bus (compatible with PXIe hybrid slot).

6528: 652x Isolated DIO series, 60 V channel isolation + solid-state relay output model.

Architecture: 24 independent optically isolated DI; 24 independent solid-state relay DO (Form A normally open), completely isolated between channels.

Part Number: 778543-01NI.

Positioning: Preferred for high-voltage (≤60 V) isolation monitoring and contactless control.

III. Technical Parameters (25℃)

1. Digital Input (DI)

Channels: 24 independent optically isolated DI (Sink/Source compatible).

Voltage range: -60 VDC to +60 VDC (industrial wide voltage).

Logic threshold: High ≥ +11 V, Low ≤ +4 V (24 V compatible).

Isolation: 60 VDC continuous between channels, channel-ground 60 VDC.

Input current: Maximum 3 mA/channel.

Input filtering: Software programmable debounce NI.

Response delay: Typical 65 μs.

2. Solid-state Relay Output (DO)

Channels: 24 independent solid-state relay DO (without contacts).

Switch voltage: 0 to 60 VDC / 30 Vrms AC.

Switch current: 150 mA/channel continuous.

Isolation: 60 VDC between channels, channel-ground 60 VDC.

Conduction resistance: Maximum 18 Ω.

Off leakage current: Maximum 1 mA.

Action time: Maximum 5 ms.

Power-on state: Programmable (default fully off) NI.

Watchdog: Software failure automatic safe state NI.

3. Physical and Environmental

Size: 3U single slot (160×100 mm).

Operating temperature: 0 to 55℃.

Power consumption: +5 V@250 mA, +3.3 V@600 mA (approximately 2.1 W).

Certification: UL, CE, measurement category II (≤60 V) NI.

IV. Interface and Communication Configuration

Front panel interface: 100-pin keyed SCSI master head (anti-misinsertion).

Adapter cable: SH100-100, R10005050 (100-pin adapter cable).

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

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

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

Synchronization: PXI trigger bus / RTSI, multi-module synchronization control.

V. Core Functions

24DI wide-voltage isolation + 24DO medium-voltage solid-state: Single card monitoring ±60 V sensors + drive 60 V/150 mA DC load, 60 V channel isolation to cut ground circulating current, solid-state relay lifespan ≥ 1 billion times.

Industrial-grade safety mechanism: keyed connector + watchdog + programmable power-on + input filtering + change detection, anti-misinsertion, automatic protection in case of software crash, power-on safe state, contact decoupling to prevent false triggering NI.

±60 V wide-voltage bidirectional input: compatible with NPN/PNP sensors, suitable for global 24-48 V industrial systems.

Output readback diagnosis: Software can read the actual state of output relays, closed-loop verification of control logic, simplifies debugging and fault troubleshooting NI.

High-density single slot: 48 channels 3U single slot, saves chassis slots, suitable for medium-scale medium-voltage isolation I/O systems NI.

VI. Application Scenarios

Industrial Automation: "Medium Voltage Monitoring + Non-contact Control": PLC extended isolated DIO, 24–48 V sensor acquisition + solenoid valve / small motor drive, production line status feedback + non-contact actuator control NI.

Power and Energy Systems: Low-voltage switch cabinet (≤60 V) status monitoring + low-power coil drive, relay protection contact acquisition, isolated monitoring circuit.

Automotive Electronics Testing: 12/24/48 V system switch quantity acquisition + vehicle lights / wipers / door lock load drive, medium voltage isolated test circuit NI.

ATE and Test System: Test fixture status acquisition + relay matrix control, power circuit (≤60 V) isolation on-off, safety interlock signal closed-loop NI.

Railway / Ship Control: Vehicle / Ship 24–48 V switch quantity isolated monitoring + small power actuator control, high-reliability I/ONI in strong interference environment.

VII. Installation and Maintenance Instructions

Installation and Power On

Disconnect the card, ensure the chassis is reliably grounded; after power-on, NI-DAQmx self-checks, no preheating required for NI.

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; it is recommended to use CB-100 isolation wiring box for intermediate transfer.

Input Voltage: ≤±60 VDC, Output Voltage: ≤60 VDC/30 VAC, Current: ≤150 mA/Channel,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) NI.

Daily Maintenance

Keep interfaces clean， prevent dust accumulation during long-term inactivity； No calibration required， regularly check the tightness of wiring terminals NI.

Solid-state relays have no mechanical wear， have a long lifespan， and do not need frequent replacement； Regularly perform insulation tests on the isolation layer (60 VDC/1 minute).