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SECURITRON MODEL UNL-12, UNL-24 UNLATCH
ELECTRONIC STRIKE INSTALLATION AND OPERATING INSTRUCTIONS
1. DESCRIPTION
Securitron's UnLatch is a revolutionary new type of electric strike which eliminates the
necessity to perform a routing operation on the door frame for installation. The motor
driven UnLatch also presents a fully concealed appearance on the door which not only
enhances the architectural appeal of the installation but improves security over a conventional
electric strike as an intruder is less able to determine the type of security device present on the
door. The UnLatch functions with cylindrical dead latches or spring latches and includes a
latch status output which reports when the door is in latched (secure) condition or is open.
Product Specifications are:
(UNL-24), +20%, -10%. Current: At rest: 40 mA (either voltage). When operating- 3 Amp
input surge @ 12 VDC; 1.5 Amp input surge @24 VDC for 100 milliseconds and 300 mA @ 12
VDC or 200 mA @ 24 VDC thereafter. Operating Temperature: -10 F to 125 F.
4.87
4.12
3.37
3.38
2. PHYSICAL INSTALLATION
2.1 SURVEY
The installer must first be sure that the latch is of
the cylindrical type with or without the deadlatch
function. See Figure 2. Most North American latches
are of this type which is also called tubular. Examples
of latch types on which the UnLatch will not
function include many panic bar latches and rim
latches (rim latches are on the surface of the door
rather than being mortised into the middle of the
door). The UnLatch also will not function on mortise
latches.
These are heavy duty rectangular units
similar in appearance to the drawing on the right.
After determining that there is a cylindrical latch, the
installer must determine whether there is a wooden,
or hollow metal (steel) door frame and whether the type of strike present on the frame is of the
ANSI 2 3/4" type (found on many residential doors) or the ANSI 4 7/8" strike (commercial).
© Copyright, 2011, all rights reserved
Securitron Magnalock Corp.
Tel 800.624.5625
Input Voltages:
FIG 1: UNLATCH DIMENSIONS (INCHES)
1.245
www.securitron.com
techsupport@securitron.com
12 VDC (UNL-12), +20%, -10%.
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1.50
VOLT/OHM METER
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CRIMP PLIERS
1.33
Page 1
ASSA ABLOY, the global leader
in door opening solutions
®
MOTORIZED
24 VDC
MORTISE LATCHES
WILL NOT FUNCTION
WITH THE UNLATCH
PN# 500-18300
Rev. D, 08/11
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Summary of Contents for Assa Abloy Securitron UNLATCH UNL-12
- Page 1 Securitron Magnalock Corp. www.securitron.com ASSA ABLOY, the global leader Tel 800.624.5625 techsupport@securitron.com in door opening solutions ® SECURITRON MODEL UNL-12, UNL-24 UNLATCH MOTORIZED ELECTRONIC STRIKE INSTALLATION AND OPERATING INSTRUCTIONS 1. DESCRIPTION Securitron’s UnLatch is a revolutionary new type of electric strike which eliminates the necessity to perform a routing operation on the door frame for installation.
- Page 2 FIG. 2: IDENTIFICATION OF CYLINDRICAL DEADLATCH AND SPRINGLATCH CYLINDRICAL DEADLATCH CYLINDRICAL SPRINGLATCH SPRINGLATCH DEADLATCH PIN 2.2 HOLLOW METAL (STEEL) FRAME MOUNTING Most steel door frames include a 4 7/8” ANSI strike. This type of door preparation allows simple installation of the UnLatch. Remove the existing strike plate (it will be discarded) and experimentally try to fit the UnLatch in the resulting cavity.
- Page 3 FIG. 3: MOUNTING ON WOOD DOOR WITH ANSI 2 3/4” STRIKE SET THE HORIZONTAL POSITION OF THE UNLATCH SO THAT THE SEPARATION DRAW VERTICAL LINE ANSI 2 3/4" OF THE TWO PLUNGERS IS THROUGH EDGE OF STRIKE 1/16" FARTHER FROM THE 1/16"...
-
Page 4: Operation
If the amount of slack or rattling is less than 1/16-1/8”, you have a “tight” door and the ability of the door to close and latch reliably is in question. To adjust for this, first check to see if the stop has “silencers” on it. These are cylindrical rubber bumpers which quiet the noise of a closing door but also have the effect of making the door close earlier. - Page 5 FIG 5: UNLATCH VIEW FROM ABOVE IN REST (SECURE) POSITION SPRING LATCH PLUNGER DEAD LATCH PLUNGER DOOR STOP DOOR FRAME DEAD LATCH DOOR SPRING LATCH IN THE REST (SECURE) POSITION, THE SPRING LATCH IS ALLOWED TO COME OUT BY THE SPRING LATCH PLUNGER THEREBY SECURING THE DOOR.
- Page 6 4. WIRING 4.1 GENERAL ELECTRICAL CHARACTERISTICS The UnLatch is a six wire device. Power (12 or 24VDC depending on the model) is applied to the red and black wires observing polarity and power should be continuously present on these wires. If you connect power in reverse, the UnLatch will not operate but it will be damaged if left connected for an extended period of time.
- Page 7 Note: The addition of the zener diodes is only required when using the UNL-24 with 24VAC transformer and bridge rectifier. When using the UNL-12 with 12VAC transformer and bridge rectifier the zener diodes are not necessary. Power supply capacity, however, is ideally 3 Amps @ 12 VDC or 1.5 Amps @ 24 VDC for best operation.
- Page 8 of the door depends on it receiving constant power. Any time power is cut to the UnLatch, it will report the door as secure regardless of whether it is latched or not. The UnLatch uses the information as to whether the door is latched or not for a second purpose. The UnLatch will not operate unless the latch is in the secure position (the spring latch plunger is pushed in).
-
Page 9: Appendix A: Troubleshooting
APPENDIX A: TROUBLESHOOTING PROBLEM-- Unit will not operate when trigger wire is connected to +V. On a new installation, make sure that DC power (12 or 24 volts depending on the model) is connected to the red and black wires with correct polarity. When this is confirmed note that the UnLatch will never operate unless the springlatch plunger is pushed in by the springlatch (see Section 3.3). - Page 10 TEMPLATE FOR CUTTING OUT ANSI 2 ¾” STRIKE PREPARATION AND INSTALLING UNLATCH ON WOODEN FRAME 1 1/4" PN# 500-18300 Page 10 Rev. D, 08/11...
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