GarrettCom ES42 Manual De Usuario

ES42 Series Edge Switches 

 Installation and User Guide (05/05)  

The two screws Alarm Contacts feature, standard on Magnum ES42H and P, 

provides Normally Closed (NC) contacts to which the user can attach one sets of status 

monitoring wires at the green terminal block. When this option is present, the terminal 

block for Alarm Contacts is part of the Power Input panel in the Magnum ES42s case. The 

DC power input connection is in the same panel.  

The NC Alarm Contact is held close 

when there is power on the main board inside of the 

ES42.  This provides a “Hardware operated Alarm” 

because the NC contacts will open when internal 

power is lost, either from an external power down 

condition or by the failure of the power supply inside 

of the Magnum ES42 Switch.  

Useful info about Alarm Contacts in 

ES42H and ES42P:  

 

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