Maintenance switch

The purpose of the main switch input is to allow a controlled shut-down and restart procedure of the outputs. Typically, contacts from a local isolator next to the fan motor will be used. When the local isolator is switched off, the input "MaintSw" will be 0 and the output "Stage1Cmd" will be switched off without delay. When the maintenance switch becomes 1 again, the plant can be restarted.

The maintenance switch will generate a alarm at the "CommAlarm" output.

With the parameter ALM-01 the user can change the contact type of the maint. switch to NO (normally open) or NC (normally closed).


Description

Default value

ALM-01: maint switch NO/ NC; 1 = NC

1