3
OPERATION WITH AUTOMATIC DOOR OPERATOR
The 781N is provided with two outputs (one output associated with DEVICE ONE and the other
output associated with DEVICE TWO) for controlling separate automatic door operators. Each
output consists of normally open relay contacts that are field wired directly to the "DOOR
ACTIVATION" input of the automatic door operator. These outputs are activated within a moment
after activation of their corresponding devices to allow time for the doors to be fully unlatched before
automatic opening begins.
Time delay pots R2 and R4 are factory set at 5 seconds, which are appropriate when using this
controller with automatic door operators. When the delay times out, power is removed from the exit
device and the signal to the auto door operator input is terminated, thus allowing the operator's
"DOOR HOLD OPEN" delay to time out and close the door.
NOTE: When using the single system latch pullback method with automatic door operator interface
and both devices are being used, the operator control input must be wired to the 781N
automatic door operator output for DEVICE TWO (TB3, terminals 9 and 10).
OPERATION WITH FIRE ALARM
The 781N can be wired to the fire alarm relay normally closed contacts. When a fire alarm occurs,
any door that is currently unlatched, whether by momentary time delay or by maintained switch, will
immediately latch secure. During the time that the fire alarm is active, electronic control of the
automatic door opening system by wall switch, card reader, keypad, etc., is disabled. The door then
can only be opened manually.
The 781N comes from the factory set up for use without fire alarm interface. If the fire alarm is to be
used with this controller, move the program jumper PJ2 from between the middle post and the end
post, marked "FA DIS" (Fire Alarm Disabled), to between the middle post and the end post, marked
"FA EN" (Fire Alarm Enabled).
NOTE: The current drawn through fire alarm relay contacts will be 120mA @ 24VDC
AUXILIARY POWER SOURCE OUTPUTS
Two constant, power limited auxiliary outputs are provided for powering keypads, motion sensors,
annunciator panels, electromagnetic door holders, relays, LEDs, etc. Choose between auxiliary
output #1 or auxiliary output #2.
Auxiliary Output #1 Range: 26.7V - 28.0V, Nominal
Auxiliary Output #2 Range: 12.6V - 16.5V, Nominal
NOTE: Both auxiliary outputs can be used at the same time for loads requiring different voltages (for
a combined maximum load current of 500mA). However, do not tie the aux. output #2 ground
(TB3, terminal 18) common to the aux. output #1 ground (TB3, terminal 16). Both of these
power sources must be isolated from each other.
CAUTION: IT IS RECOMMENDED TO USE OUTPUT #2 WITH EQUIPMENT THAT HAVE INPUTS
RATED FOR 12 - 24 VOLTS, AC OR DC. CHECK WITH THE MANUFACTURER
BEFORE CONNECTING 24VDC RATED EQUIPMENT ACROSS OUTPUT #1 TO
ENSURE THE HIGHER VOLTAGE WILL NOT CAUSE ANY DAMAGE.
An ASSA ABLOY Group brand
80-9477-0781-010 (01-13)
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