STULZ E
2
SERIES CONTROLLER FOR PERIMETER SYSTEMS OPERATION MANUAL
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Dual Power
A/Preferred Power OK
B/Alternate Power OK
Press ( ) or ( ) Key
5.2.21 Dual Power
If the controller is programmed to monitor dual power operation, a display screen is
provided which indicates the status of the power sources. The screen message “OK”
indicates the controller senses that both sources of power are available.
Dual Power
Delay A to B 10s
Delay B to A 10s
Primary A
A_In OK A_Out On
B_In OK B_Out Off
Press ( ) or ( ) Key
5.2.21.1 Dual Power with UPS
If the controller is programmed to manage the dual power auto transfer sequence,
a display screen is provided which indicates the programmed delay periods for the
auto power transfer sequence to begin. This screen also indicates which power
source is currently operating the unit. The status of the power sources appears at
the bottom of the display. The On/Off status of the control output signals to the
switching relays also appears.
Dual Power
Delay Pre to Alt 10s
Delay Alt to Pre 10s
Primary Preferred
Select switch at
Pre In OK Pre Out On
Alt In Err Alt Out Off
Press ( ) or ( ) Key
5.2.21.2 Special Dual Power
An alternate menu may be selected in Factory>Options>Misc. Confi g. The only
difference is the text displayed: Preferred or Alternate instead of A or B. Otherwise,
the values are one for one to 5.2.21.1.
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