2
A7408B
Smoke Detector Operation and Application
The closer/holder unit includes a 4-wire, photoelectric type smoke
detector. It provides: smoke detection, door holder solenoid control,
N.O. alarm contact, N.C. supervisory contact and interconnection to
other smoke detectors. Field option: one form C auxiliary contact (cut
jumper wire between 11 and 12).
Terminal Inputs and Outputs
•
24VDC input power is applied to terminals 3 (-) and 14 (+) by the
adjacent circuit board. Red LED flashes every 8 seconds
•
Terminals 1 and 2 provide a normally open (alarm) contact. This
contact closes when smoke is detected. Red LED illuminates
continuously
•
Terminals 5 and 13 provide a normally closed supervisory (trouble)
contact. This contact opens when power is lost to the detector
circuity. Red LED stops flashing
•
Terminals 9 and 6 provide rectified, unfiltered 24VDC to the door
holder solenoid. This power is cut in alarm and the door closes
•
Terminals 7 and 8 provide rectified, unfiltered 24VDC to auxiliary
devices when the detector alarms
•
Terminal 10 is rail + output. It is a continuous, rectified, unfiltered
24VDC used for remote detector interconnect applications
•
Terminals 8, 9 and 10 may be field configured to a dry form contact
by cutting jumper between terminal 11 and 12. Terminal 10 is
Common, 9 is N.C. and 8 is N.O. If this is done, Aux.+ is lost;
solenoid power must be supplied by a separate source.
•
Terminals 15 and 4 provide interconnections to other detectors (See
diagram Pg. 4). Up to five smoke detectors may be interconnected.
When a single detector alarms, terminal 15 goes high and any
interconnected smoke detector will close its doors. The unit that
initiated the alarm will have its LED on. The other interconnected
units’ LEDs will flash as normal. Refer to interconnection wiring
diagram for connections.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Detector Specifications (Part# 63-3210, Revision D)
Type: Photo-Electric Smoke Detector
Complies with UL 228 and UL 268 standards
Power Requirements: 24VDC +/- 10%
Nominal Sensitivity: 2.325 +/- 1.055%/FT
Contact Ratings
Alarm and/or Accessory
2.0 AMPS Max. @ 24VDC
(Resistive load)
0.6 AMPS Max. @ 120 VAC
Trouble Contact
0.5 AMPS Max. @ 24VDC
(Resistive load)
Connection List
Function
Terminal
24VDC input
3 (-), 14 (+)
Alarm contacts
1, 2
So
9
Solenoid -
6
Aux +
8
Aux -
7
Interc
15
Interconnect -
4
Trouble contacts
13, 5
+24VDC output (unfiltered) 10
NOTE: Terminals 4, 6 and 7 are same point.
