Model Explanation

PXI: Compliant with the PXI bus standard (PCI eXtensions for Instrumentation)

2564: The model number of the NI switch module, defined as 16-channel SPST, 150 V, 5 A, non-latching electromechanical relay

Full Name: PXI-2564 / 778572-64 → 16-Channel, 5 A, SPST PXI Relay Module

Topology Alias: NISWITCH_TOPOLOGY_2564_16_SPST (default 16×SPST) NI Technical Specifications

Switch and Electrical Characteristics

Topology: 16 independent SPST (normally open, Form A); configurable as 8 DPSTNI

Relay Type: Electromechanical, non-latching, gold-plated contacts NI

Maximum Switching Voltage: 150 VDC / 125 VAC (peak) NI

Maximum Switching / Load Current: 5 A (per channel) NI

Maximum Switching Power: 750 VA

On-Resistance (typical): <50 mΩ

Thermal Offset (typical): <1 µV

Bandwidth: DC～10 MHz NI

Action Time (maximum): 10.4 ms

Relay Lifespan:

Mechanical Life: 2×10⁷ times

Full-load Electrical Life: 1×10⁵ times NI

Trigger and Control

Trigger Line: Supports PXI Trigger 0～7

Minimum Trigger Pulse Width: 150 ns

Output Trigger Pulse Width: 1～62 µs programmable (default 2 µs) NI

Physical and Environmental

Form: Standard PXI 3U single slot

Connector: Front panel 37-pin D-SUB (male)

Size (Length × Width × Height): Approximately 216×20×130 mm

Weight: Approximately 0.27 kg

Operating Temperature: 0～55°C

Storage Temperature: -20～70°C

Power Consumption (5 V): Approximately 5 W

Front Panel I/O

37-pin D-SUB (male):

16×SPST mode: 1 COM and 1 NO per channel; 16 independent channels

8×DPST mode: 1 COM and 2 NO per channel; 8 dual-channel switches

Backplane and Driver

Bus Interface: PXI mixed slot (compatible with PXI-1/PXIe)

Power Supply: PXI backplane 5 V power supply

Driver Software: NI-SWITCH, supports LabVIEW, TestStand, CVI, Python, etc.

Software Functions: MAX identification, topology configuration, relay counting, trigger management NI

Core Functions

16 SPST / 8 DPST reconfigurable: Software switch topology, balancing channel density and dual-channel synchronous control NI

High Current / High Voltage Switching Capability: 150 V, 5 A, meeting the switching requirements of most power devices and power paths NI

Low On-Resistance + Low Thermal Offset: suitable for precise current/voltage measurement circuits NI

Hardware Trigger Synchronization: PXI backplane trigger, precise timing accuracy (<1 µs) when multiple modules are synchronized NI

Relay Health Monitoring: On-board closing count, supporting predictive maintenance NI

Field Replaceable Relays: No need for factory return, reducing maintenance costs NI Applicable scenarios

Automotive electronic testing: ECU power circuit, load box, relay/fuse simulation

Military / Aviation: Power distribution, high-power signal routing, electromagnetic coil control

Industrial ATE: Power / load switching in mass production testing, relay module aging test

Energy and power: Battery testing, photovoltaic module testing, high-voltage circuit control

General high-power switches: Replace mechanical switches to achieve automated program-controlled switching

User and maintenance instructions

Installation and configuration

Insert the PXI 3U single slot and fix it.

Install the NI-SWITCH driver, identify the module in MAX and select the topology (16×SPST or 8×DPST).

Connect the 37-pin D-SUB cable, avoid strong pulling and dragging; for high-power circuits, it is recommended to use shielded cables and reliable grounding.

Key operation points

Power limit: Strictly follow the 150 V / 5 A limit; inductive loads (motors, coils) need to be equipped with current-limiting protection to avoid overvoltage breakdown of contacts NI.

Trigger selection:

Low-speed debugging: Software immediate trigger;

High-speed synchronization: PXI hardware trigger (0-7 lines).

Channel independent control: 16 channels can be independently turned on and off, without interference.

Maintenance and calibration

Life monitoring: Read the number of closures through NI-SWITCH, warning for replacement when approaching 1×10⁵ times (full load); NI.

Regular inspection: Check the D-SUB connector for looseness and oxidation every quarter; clean the contacts.

Environmental requirements: Working temperature 0-55°C, humidity 10%-90% (no condensation).

Relay replacement: Replace on-site according to NI manual steps, no professional tools required NI