NI PXI-8423 Isolated 2-Port RS485 Interface for PXI

NI PXI-8423 Isolated 2-Port RS485 Interface for PXI

Product Overview

The NI PXI-8423 module provides two separate, isolated RS485 interfaces that allow PXI systems to communicate with other RS485 protocol-based devices. The module enhances system reliability and stability through its isolation feature, especially in environments where electrical noise or ground potential differences exist.

Technical Specifications

Interface standard: conforms to RS485 interface standard and supports differential signal transmission, featuring strong noise resistance and long transmission distance.

Number of ports: Provide two independent RS485 interface ports.

Isolation characteristics: electrical isolation between the interface and between the interface and the PXI system, effectively preventing electrical noise and ground potential difference on the system.

Transmission rate: support a variety of transmission rates, depending on the configuration of the RS485 network and the type of cable used.

Operating Voltage: Usually support a certain voltage range, such as 24Vdc/120Vac, to adapt to different application scenarios.

Size and Weight: Size and weight vary depending on the specific model, but usually meet the standard size requirements of PXI systems.

Functional Features

High Reliability: Improved system reliability and stability through electrical isolation and differential signal transmission.

Flexibility: Supports a wide range of transmission rates and configuration options that can be customised to meet specific needs.

Easy to integrate: As part of a PXI system, the NI PXI-8423 module is easy to integrate with other PXI modules and systems.

Wide range of application scenarios: suitable for industrial automation, process control, data acquisition and communication.

Application Scenarios

Industrial automation: In industrial automation systems, NI PXI-8423 modules can be used to connect a variety of RS485 protocol-based devices, such as sensors, actuators and controllers.

Process control: In process control systems, the module can be used to monitor and control a variety of process parameters, such as temperature, pressure and flow rate.

Data Acquisition: In a data acquisition system, the NI PXI-8423 module can be used to collect data from remote devices and transfer it to a PXI system for processing and analysis.

Communication system: In the communication system, the module can be used to achieve data communication and signal transmission between devices.

Price and Purchase

The price of the NI PXI-8423 module varies by supplier, purchase quantity and region.

Summary

The NI PXI-8423 is a powerful, easy-to-integrate and highly reliable isolated 2-port RS485 interface module. It is suitable for a variety of application scenarios, such as industrial automation, process control, data acquisition and communication. Through its isolation characteristics and differential signal transmission capability, the module can effectively improve the reliability and stability of the system.

OTHER INFORMATION

• Works with all FieldPoint I/O modules (the FP-TB-3 is designed specifically to work with thermocouple I/O modules) 

• V and C terminals provide external supply voltages common to all channels 

• DIN-rail mounting or panel mounting 

• 32 terminals available for field connections (FP-TB-3 has 16) 

• Available with screw terminals (FP-TB-1 and FP-TB-3) or spring terminals (FP-TB-2) 

• Isothermal construction (FP-TB-3) minimizes temperature gradients when using thermocouples 

• –40 to 70 °C operation

Maintenance and Troubleshooting

Periodic Checks:

Periodically check the status of the LEDs on the board to ensure that all signals are functioning properly.

Check that jumpers are configured correctly to ensure proper operation of the board.

Cleaning and Maintenance:

Keep the surface of the circuit board clean and dry to avoid dust and moisture damage to the board.

Regularly check the connection of power and signal cables to ensure that the connection is firm and reliable.

Troubleshooting:

If a fault occurs, you can troubleshoot the problem by checking the LED indicators, jumper configurations, power and signal cables.