140ERT85420 SCHNEIDER

Item Function

1 Preference A/B Button Press to set a preferred source: the first press sets source A, the second 

press sets source B, and the third press sets no preference.

2 Source A and B LEDs Indicate preferred source. If no source is preferred, both LEDs are 

illuminated. You can also see preferred source on the LCD Display.

3 Input Connector LEDs Provide information about input voltage from each source. If the RMS 

input voltage and measured frequency are within the selected tolerance 

range, the corresponding indicator will be illuminated. In a normal 

operating condition (full source redundancy) both sets of LEDs are 

illuminated.

4 Output Connector LEDs Indicate which source is being used for the output (only one path will be 

illuminated at any time). Together, the Source Preference LEDs, the 

Connector LEDs, and the Output LED show the power flow through the 

ATS.

5 Output LED Shows that voltage is available at the output of the ATS.

6 LCD Display View ATS status, settings, and product information. See “Front Panel 

Screens” on page 12 for more information on LCD display screens.

7 Display navigation buttons On the LCD Display, icons indicate the purpose of adjacent buttons.

 Home: Press to move through monitor screens or return to monitor 

screens from sub-menus. 

 Down: Press to move through monitor screens or menu items.

 Select: Press to select menu items or navigate to the main menu from 

monitor screens.

8 Load Status LED See “Load Status LED” on page 11

9 Network Status LED See “Network Status LED” on page 11

: 10/100 Base-T Connector Connects the ATS to the network.

; 10/100 Status LED See “10/100 Status LED” on page 11.

< USB port Use USB drives for firmware upgrades.

= Serial port Connect your computer to the ATS for local access to the command line 

interface. Use the supplied Serial Communication cable (Schneider 

Electric part number 940-0144A).

> Reset switch Restarts ATS network and serial communication.