National Instruments cFP-PWM-520 用户手册

© National Instruments Corp.

[c]FP-PWM-520, it sends initial configuration information to the 
[c]FP-PWM-520. After the [c]FP-PWM-520 receives this initial 
information, the green READY indicator lights and the module is 
in normal operating mode.

In addition to the green POWER and READY indicators, each 
channel has a numbered, green status LED that lights when the 
channel is in the ON state.

You may need to upgrade your FieldPoint firmware when you add 
new I/O modules to your FieldPoint system. For information on 
determining which firmware you need and how to upgrade your 
firmware, go to 

ni.com/info

 and enter 

fpmatrix

.

Read the following information before 

attempting to connect the [c]FP-PWM-520 to any circuits 
that may contain hazardous voltages.

This section describes the isolation of the [c]FP-PWM-520 and its 
compliance with international safety standards. The field wiring 
connections are isolated from the backplane and the inter-module 
communication bus. The isolation barriers in the module provide 
250 V

rms

 Measurement Category II continuous isolation, verified 

by 2,300 V

rms

, 5 s dielectric withstand test. The [c]FP-PWM-520 

provides double insulation (compliant with IEC 61010-1) for 
working voltages of 250 V

rms

1

. Safety standards (such as those 

published by UL and IEC) require the use of double insulation 
between hazardous voltages and any human-accessible parts or 
circuits.

Never try to use any isolation product between human-accessible 
parts (such as DIN rails or monitoring stations) and circuits that 
can be at hazardous potentials under normal conditions, unless the 
product is specifically designed for such an application, as is the 
[c]FP-PWM-520.

1  

Working voltage is defined as the signal voltage plus the common-mode voltage. 
Common-mode voltage is the voltage of the module with respect to ground.