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LED Indicator 

There are 3 LEDs display on the front of HRT-370: 

(1)  PWR: indicates module power status 
(2)  HART: indicates communication status of HART 
(3)  AO: indicates analog output status 

The below table listed the description of LEDs status. 

LED Name 

LED Status

LED Description 

ON 

Module power supply normally 

Power 

OFF 

Module power supply failed 

ON 

HART slave device connected 

HART 

OFF 

HART slave device disconnected

ON 

Analog output loop connected 

AO 

OFF 

Analog output loop disconnected

 

 

 

 

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