PXI-2565 16-Channel 7 A SPST Power Relay Module
Земля PXI-2565 is a 16-channel PXI power relay module designed for programmable switching of AC line power, DC supplies and medium-current electrical loads. It contains 16 independently controlled, normally open SPST electromechanical relays.
The module supports resistive AC switching up to 7 A at 250 VAC and DC switching up to 5 A at 30 VDC, subject to its complete voltage, current and power limits. Typical applications include power-distribution control, automated load switching, environmental systems and production test equipment.
Key Features of the PXI-2565
- 16 independent SPST normally open channels
- 7 A maximum resistive AC switching current
- 5 A maximum DC switching current at 30 VDC
- 250 VAC or 125 VDC maximum switching voltage
- 1750 VA maximum AC switching power per channel
- 150 W maximum DC switching power per channel
- Nonlatching electromechanical relays
- Field-replaceable, socketed relay construction
- Low initial path resistance
- PXI hardware trigger support
- 1400 Vrms input-to-backplane isolation
- Compatible PXI-TB-2565 screw-terminal accessory
- NI-SWITCH and NI Switch Executive support
PXI-2565 Technical Specifications
| Product Model | PXI-2565 |
|---|---|
| Part Number | 777754-01 |
| Product Type | High-power general-purpose PXI relay module |
| Number of Channels | 16 |
| Relay Configuration | SPST normally open, Form A |
| Relay Operation | Nonlatching electromechanical |
| Maximum DC Voltage | 125 VDC |
| Maximum AC Voltage | 250 VAC, CAT II |
| Maximum DC Switching Current | 5 A at 30 VDC |
| Maximum AC Switching Current | 7 A at 250 VAC, resistive load |
| Maximum DC Switching Power | 150 W per channel |
| Maximum AC Switching Power | 1750 VA per channel |
| Minimum Recommended Load | 10 mA at 5 VDC |
| Initial Path Resistance | Less than 0.03 Ω |
| Typical Operate Time | 5 ms |
| Maximum Operate Time | 10 ms |
| Typical Release Time | 4 ms |
| Mechanical Relay Life | 5 × 107 operations |
| Electrical Life at Maximum Load | 1 × 105 operations |
| Front Connectors | Two 16-position Mini-Combicon connectors |
| Module Format | 3U, two-slot PXI module |
| Operating Temperature | 0°C to 50°C |
PXI-2565 Part Number and Accessories
| Item | Part Number | Описание |
|---|---|---|
| PXI-2565 | 777754-01 | 16-channel high-power SPST relay module |
| PXI-TB-2565 | 761289-16 or 761289-01 | Screw-terminal accessory for PXI-2565 wiring and debugging |
| PXI-2565 Relay Kit | 777880-01 | Replacement kit containing compatible socketed relays |
Confirm the terminal-block revision and connector arrangement before ordering. The external cable, terminal block, wire gauge, fuses and fixture must all be rated for the intended load.
16 Independent SPST Power Channels
Each PXI-2565 channel functions as an independently programmable normally open contact. Closing a relay completes the external circuit, while opening it disconnects the load.
The SPST architecture is useful for individually controlling power supplies, heaters, lamps, fans, solenoids, contactors and other loads in an automated test system.
AC Line and DC Power Switching
The PXI-2565 supports AC line switching as high as 250 VAC and DC signal switching up to 125 VDC. The maximum permitted current depends on the voltage, load type and applicable switching-power limitation.
The 7 A rating applies to supported resistive AC conditions. DC switching at 30 VDC is limited to 5 A. Do not interpret the highest voltage and highest current ratings as values that can automatically be used together.
Inductive and Capacitive Loads
Motors, solenoids and contactor coils can generate high-voltage transients when their current is interrupted. Capacitive loads and lamps can produce inrush current far above their normal operating current.
Use correctly selected flyback diodes, RC snubbers, transient suppressors, current limiting or external contactors when the load characteristics require additional protection.
Field-Replaceable Relays
The electromechanical relays are installed in sockets and can be replaced during module servicing. This can extend the service life of the module in applications where individual channels receive unusually high switching activity.
Before replacing a relay, disconnect all external sources, observe electrostatic-discharge precautions and use the replacement type specified by NI.
Thermal and Power-Dissipation Considerations
Heat dissipation increases as more channels carry current. When many relays are closed simultaneously, confirm the chassis airflow, ambient temperature and applicable current-derating requirements.
The PXI-2565 occupies two chassis slots. Ensure that the chassis has two suitable adjacent slots and that nearby modules do not obstruct cooling.
PXI-2565 Applications
- AC line-power distribution
- DC power-supply switching
- Heater and fan control
- Lamp and indicator testing
- Motor and solenoid control through protected circuits
- Автоматизированное испытательное оборудование
- Environmental and reliability testing
- Production functional test
- Power-path selection
- Load-bank control
NI-SWITCH Software Integration
NI-SWITCH provides programmatic control of each relay. Test applications can open or close individual channels, create scan lists, configure triggers and monitor switching operations.
NI Switch Executive can assign descriptive names to power circuits and relay paths, making large test systems easier to document and maintain.
PXI-2565 Troubleshooting
The relay closes but the load does not operate
Check the external power source, return path, fuse, terminal-block wiring and load continuity. The relay supplies a contact closure but does not generate power.
A relay contact has excessive resistance
Disconnect power and measure the complete path. Inspect the terminal block, connector and fixture before concluding that the internal relay is worn.
A relay fails after switching an inductive load
Check the load’s stored energy and confirm that suitable suppression was installed. Inductive transients can exceed the relay’s contact-voltage rating.
The module becomes unusually hot
Reduce the number of simultaneously loaded channels and check current on every path. Verify chassis fan operation, ambient temperature and wire-terminal tightness.
The module is not detected
Confirm correct installation in two compatible chassis slots and verify NI-SWITCH installation in NI MAX.
PXI-2565 vs PXI-2566
| Функция | PXI-2565 | PXI-2566 |
|---|---|---|
| Конфигурация | 16 SPST relays | 16 SPDT relays |
| Primary Function | High-current on/off switching | Changeover signal and load routing |
| Best Suited For | Power distribution and load control | Selecting between two circuit paths |
Recommended Related Products
- PXI-2564 General-Purpose Relay Module
- PXI-2566 SPDT Relay Module
- PXI-2567 Relay Driver Module
- PXI-2584 Multiplexer Switch
- View More NI PXI Modules
Frequently Asked Questions
What is the PXI-2565?
The PXI-2565 is a 16-channel SPST electromechanical power relay module for software-controlled AC and DC load switching.
What is its maximum AC current?
It supports as much as 7 A at 250 VAC for a supported resistive load.
What is its maximum DC switching current?
The maximum specified DC switching current is 5 A at 30 VDC, subject to the complete switching-power limits.
Are the relays replaceable?
Yes. The PXI-2565 uses socketed, field-replaceable relays.
Does the module supply voltage to a load?
No. It provides isolated relay contacts. The external power source and load must be connected through the test fixture.
What is the PXI-2565 part number?
The commonly listed NI ordering part number is 777754-01.
Request a Quote for the PXI-2565
Contact us for current availability and pricing for the PXI-2565 16-Channel SPST Power Relay Module. We can also help identify terminal blocks, relay kits, PXI chassis and alternative power-switching modules.
