Differences Between EtherCAT Slaves NI 9144 and NI 9145

Publish Date: Feb 14, 2018 | 1 Ratings | 5.00 out of 5 | Print

Overview

This article explains the differences between the NI 9144 and the NI 9145.

1. Introduction

The NI 9145 is a replacement for the NI 9144 and the core functionalities and the appearance remain the same.

  • The NI 9145 is only supported in EtherCAT 16.1 and later. The NI 9144 is also supported in earlier versions of the driver.
  • The NI 9145 has more memory and FPGA resource from a hardware perspective.
  • On the software side, the NI 9145's core functionalities are same as the NI 9144. You can set up and use the NI 9145 with exactly the same procedures as the NI 9144.

 

However, with upgrading the hardware, you will get the performance improvement mentioned below with the NI 9145:

PDO (Process Data Object) size improvement

EtherCAT Chassis PDO Input PDO Output
NI 9144 512 Bytes 512 Bytes
NI 9145 7500 Bytes 7500 Bytes

 

HSI (High Speed Interface) module support

The NI 9144 only support HSI modules on the first 4 slots; however, the NI 9145 can support HSI modules on all 8 slots.

EtherCAT Chassis HSI Support
NI 9144 Slot 1-4
NI 9145 Slot 1-8

 

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2. Additional Resources

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