STI LT-1UL User manual
STI LATCHING/TIMER MODEL LT-1UL
NOTE
It is important to read, understand and follow all instructions provided with this product. It is the installer’s responsibility to
comply with NFPA 70, 72 & 101, NEC, mounting specifications according to ADA and other applicable codes. This product
is not to be used in place of panic hardware. To avoid electrical shock, DO NOT attempt to install this product when power
is on. After installation and testing are complete, provide a copy of this manual to all personnel responsible for testing and
maintenance of this product.
*For access control installations, power for the LT-1UL Timer must be supplied by a power source Listed to UL294. When
used for access control, this device shall be used a part of an access controlled egress door system. It is up to the local AHJ
to allow use of this device in place of an automatic sensor. For higher security installations, lower time limits should be used.
RELAY MODE
N.O. - Relay N.O. -switches with power to circuit - Fail Safe (default)
N.C. - Relay is in same state as with no power to circuit - Fail Secure (cut jumper)
TO CHANGE TIMER SETTINGS (default = 15 seconds): Cut jumpers with “X”, do not cut jumpers with “ “.
If the trigger is activated during a timing cycle, the timer is restarted.
NOTE To ensure jumpers do not reattach or short to other components, cut jumper off completely flush to PCB.
+
-
+
-
x
RELAY ACTIVE LED RED
POWER LED GREEN
1.28 in.
33mm
1.74 in.
44mm
.632 in.
16mm
#6 - 32 x 5/16”
PHILLIPS PAN HEAD SCREW
(2) PROVIDED
CASE BASE
CASE TOP
LT-1PCB
POWER IN
12 - 24 VAC/VDC
TIMER
CONTROL
FORM “C”
DRY CONTACTS
3A, 30VDC
RESET
INPUT COM
TRIGGER
N.C.
COM
N.O.
TIMER START
SWITCH
TIMER OVERRIDE
RESET (OPTIONAL)
*POWER IN
12-24 VAC/VDC
TO MAGNETIC LOCK
(FAIL SAFE MODE)
JUMPERS
15 SEC
RELAY MODE JUMPER
30 SEC 45 SEC LATCH
+
-
*POWER IN
≠≠VAC/VDC, 18 mA
TIMER
CONTROL
FORM “C”
DRY CONTACTS
3A, 30VDC
RESET
INPUT COM
TRIGGER
N.C.
COM
N.O.
19082 #6 - 32 x 5/16”
PHILLIPS PAN HEAD SCREW
(2) PROVIDED
CASE BASE
LT-1PCB
CASE TOP
FAIL SAFE MODE
WIRING DIAGRAM
FAIL SECURE MODE
WIRING DIAGRAM
12-24 VAC/VDC
12-24 VAC/VDC
UB-1/UB-2
UB-1/UB-2
BUTTON LED
CONTACT SET 1
CONTACT SET 2
MESSAGE LED
BUTTON LED
CONTACT SET 1
CONTACT SET 2
MESSAGE LED
NO COM
NO
NC
NC
COM
NO COM
NO
NC
NC
COM
+
–
RST
INPUT COM
TRIG
RELAY NC
RELAY COM
RELAY NO
+
–
RST
INPUT COM
TRIG
RELAY NC
RELAY COM
RELAY NO
LT-1
LT-1
DOOR
LOCK
RESET SWITCH
(OPTIONAL EXCEPT ON
LATCH TIMER SETTING)
DOOR
LOCK
RESET SWITCH
(OPTIONAL EXCEPT ON
LATCH TIMER SETTING)
ILLUMINATING GREEN
ILLUMINATING RED
SHOWN: POWER ON
NORMAL CONDITION
x x
x
ELECTRONIC INSULATION PAPER
IF TRACES ARE INADVERTENTLY CUT,
SOLDER JUMPER WIRES USING
APPROPRIATE HOLES.
RELAY MODE
N.O.
N.C.
NO CUT
CUT
15s
30s
45s
Ltch
Relay
NO
Relay
COM
Relay
NC
Trig Input
Com
Reset Power Input
+
-
12 to 24 Volts
AC or DC
MODEL LT-1
RELAY MODE
N.O.
N.C.
NO CUT
CUT
15s
30s
45s
Ltch
+
-
+
-
x
RELAY ACTIVE LED RED
POWER LED GREEN
1.28 in.
33mm
1.74 in.
44mm
.632 in.
16mm
#6 - 32 x 5/16”
PHILLIPS PAN HEAD SCREW
(2) PROVIDED
CASE BASE
CASE TOP
LT-1PCB
POWER IN
12 - 24 VAC/VDC
TIMER
CONTROL
FORM “C”
DRY CONTACTS
3A, 30VDC
RESET
INPUT COM
TRIGGER
N.C.
COM
N.O.
TIMER START
SWITCH
TIMER OVERRIDE
RESET (OPTIONAL)
*POWER IN
12-24 VAC/VDC
TO MAGNETIC LOCK
(FAIL SAFE MODE)
JUMPERS
15 SEC
RELAY MODE JUMPER
30 SEC 45 SEC LATCH
+
-
*POWER IN
≠≠VAC/VDC, 18 mA
TIMER
CONTROL
FORM “C”
DRY CONTACTS
3A, 30VDC
RESET
INPUT COM
TRIGGER
N.C.
COM
N.O.
19082 #6 - 32 x 5/16”
PHILLIPS PAN HEAD SCREW
(2) PROVIDED
CASE BASE
LT-1PCB
CASE TOP
FAIL SAFE MODE
WIRING DIAGRAM
FAIL SECURE MODE
WIRING DIAGRAM
12-24 VAC/VDC
12-24 VAC/VDC
UB-1/UB-2
UB-1/UB-2
BUTTON LED
CONTACT SET 1
CONTACT SET 2
MESSAGE LED
BUTTON LED
CONTACT SET 1
CONTACT SET 2
MESSAGE LED
NO COM
NO
NC
NC
COM
NO COM
NO
NC
NC
COM
+
–
RST
INPUT COM
TRIG
RELAY NC
RELAY COM
RELAY NO
+
–
RST
INPUT COM
TRIG
RELAY NC
RELAY COM
RELAY NO
LT-1
LT-1
DOOR
LOCK
RESET SWITCH
(OPTIONAL EXCEPT ON
LATCH TIMER SETTING)
DOOR
LOCK
RESET SWITCH
(OPTIONAL EXCEPT ON
LATCH TIMER SETTING)
ILLUMINATING GREEN
ILLUMINATING RED
SHOWN: POWER ON
NORMAL CONDITION
x x
x
ELECTRONIC INSULATION PAPER
IF TRACES ARE INADVERTENTLY CUT,
SOLDER JUMPER WIRES USING
APPROPRIATE HOLES.
RELAY MODE
N.O.
N.C.
NO CUT
CUT
15s
30s
45s
Ltch
Relay
NO
Relay
COM
Relay
NC
Trig Input
Com
Reset Power Input
+
-
12 to 24 Volts
AC or DC
MODEL LT-1
RELAY MODE
N.O.
N.C.
NO CUT
CUT
15s
30s
45s
Ltch
+
-
+
-
x
RELAY ACTIVE LED RED
POWER LED GREEN
1.28 in.
33mm
1.74 in.
44mm
.632 in.
16mm
#6 - 32 x 5/16”
PHILLIPS PAN HEAD SCREW
(2) PROVIDED
CASE BASE
CASE TOP
LT-1PCB
POWER IN
12 - 24 VAC/VDC
TIMER
CONTROL
FORM “C”
DRY CONTACTS
3A, 30VDC
RESET
INPUT COM
TRIGGER
N.C.
COM
N.O.
TIMER START
SWITCH
TIMER OVERRIDE
RESET (OPTIONAL)
*POWER IN
12-24 VAC/VDC
TO MAGNETIC LOCK
(FAIL SAFE MODE)
JUMPERS
15 SEC
RELAY MODE JUMPER
30 SEC 45 SEC LATCH
+
-
*POWER IN
≠≠VAC/VDC, 18 mA
TIMER
CONTROL
FORM “C”
DRY CONTACTS
3A, 30VDC
RESET
INPUT COM
TRIGGER
N.C.
COM
N.O.
19082 #6 - 32 x 5/16”
PHILLIPS PAN HEAD SCREW
(2) PROVIDED
CASE BASE
LT-1PCB
CASE TOP
FAIL SAFE MODE
WIRING DIAGRAM
FAIL SECURE MODE
WIRING DIAGRAM
12-24 VAC/VDC
12-24 VAC/VDC
UB-1/UB-2
UB-1/UB-2
BUTTON LED
CONTACT SET 1
CONTACT SET 2
MESSAGE LED
BUTTON LED
CONTACT SET 1
CONTACT SET 2
MESSAGE LED
NO COM
NO
NC
NC
COM
NO COM
NO
NC
NC
COM
+
–
RST
INPUT COM
TRIG
RELAY NC
RELAY COM
RELAY NO
+
–
RST
INPUT COM
TRIG
RELAY NC
RELAY COM
RELAY NO
LT-1
LT-1
DOOR
LOCK
RESET SWITCH
(OPTIONAL EXCEPT ON
LATCH TIMER SETTING)
DOOR
LOCK
RESET SWITCH
(OPTIONAL EXCEPT ON
LATCH TIMER SETTING)
ILLUMINATING GREEN
ILLUMINATING RED
SHOWN: POWER ON
NORMAL CONDITION
x x
x
ELECTRONIC INSULATION PAPER
IF TRACES ARE INADVERTENTLY CUT,
SOLDER JUMPER WIRES USING
APPROPRIATE HOLES.
RELAY MODE
N.O.
N.C.
NO CUT
CUT
15s
30s
45s
Ltch
Relay
NO
Relay
COM
Relay
NC
Trig Input
Com
Reset Power Input
+
-
12 to 24 Volts
AC or DC
MODEL LT-1
RELAY MODE
N.O.
N.C.
NO CUT
CUT
15s
30s
45s
Ltch
All manuals and user guides at all-guides.com
INSTRUCTIONS FOR MOUNTING
1. Locate suitable mounting position
in a listed gang box.
2. Using case base as a template,
mark and drill (2) 7/64” holes.
3. Attach case base with 2 thread
forming screws (included).
4. Install insulation paper.
5. Snap circuit board into place with
terminal strip toward case edge
with arrow.
6. Snap on case top.
7. Wire devices.
+
-
+
-
x
RELAY ACTIVE LED RED
POWER LED GREEN
1.28 in.
33mm
1.74 in.
44mm
.632 in.
16mm
#6 - 32 x 5/16”
PHILLIPS PAN HEAD SCREW
(2) PROVIDED
CASE BASE
CASE TOP
LT-1PCB
POWER IN
12 - 24 VAC/VDC
TIMER
CONTROL
FORM “C”
DRY CONTACTS
3A, 30VDC
RESET
INPUT COM
TRIGGER
N.C.
COM
N.O.
TIMER START
SWITCH
TIMER OVERRIDE
RESET (OPTIONAL)
*POWER IN
12-24 VAC/VDC
TO MAGNETIC LOCK
(FAIL SAFE MODE)
JUMPERS
15 SEC
RELAY MODE JUMPER
30 SEC 45 SEC LATCH
+
-
*POWER IN
≠≠VAC/VDC, 18 mA
TIMER
CONTROL
FORM “C”
DRY CONTACTS
3A, 30VDC
RESET
INPUT COM
TRIGGER
N.C.
COM
N.O.
19082 #6 - 32 x 5/16”
PHILLIPS PAN HEAD SCREW
(2) PROVIDED
CASE BASE
LT-1PCB
CASE TOP
FAIL SAFE MODE
WIRING DIAGRAM
FAIL SECURE MODE
WIRING DIAGRAM
12-24 VAC/VDC
12-24 VAC/VDC
UB-1/UB-2
UB-1/UB-2
BUTTON LED
CONTACT SET 1
CONTACT SET 2
MESSAGE LED
BUTTON LED
CONTACT SET 1
CONTACT SET 2
MESSAGE LED
NO COM
NO
NC
NC
COM
NO COM
NO
NC
NC
COM
+
–
RST
INPUT COM
TRIG
RELAY NC
RELAY COM
RELAY NO
+
–
RST
INPUT COM
TRIG
RELAY NC
RELAY COM
RELAY NO
LT-1
LT-1
DOOR
LOCK
RESET SWITCH
(OPTIONAL EXCEPT ON
LATCH TIMER SETTING)
DOOR
LOCK
RESET SWITCH
(OPTIONAL EXCEPT ON
LATCH TIMER SETTING)
ILLUMINATING GREEN
ILLUMINATING RED
SHOWN: POWER ON
NORMAL CONDITION
x x
x
ELECTRONIC INSULATION PAPER
IF TRACES ARE INADVERTENTLY CUT,
SOLDER JUMPER WIRES USING
APPROPRIATE HOLES.
RELAY MODE
N.O.
N.C.
NO CUT
CUT
15s
30s
45s
Ltch
Relay
NO
Relay
COM
Relay
NC
Trig Input
Com
Reset Power Input
+
-
12 to 24 Volts
AC or DC
MODEL LT-1
RELAY MODE
N.O.
N.C.
NO CUT
CUT
15s
30s
45s
Ltch
Printed in USA LT-1PCB OCT2018
+
-
+
-
x
RELAY ACTIVE LED RED
POWER LED GREEN
1.28 in.
33mm
1.74 in.
44mm
.632 in.
16mm
#6 - 32 x 5/16”
PHILLIPS PAN HEAD SCREW
(2) PROVIDED
CASE BASE
CASE TOP
LT-1PCB
POWER IN
12 - 24 VAC/VDC
TIMER
CONTROL
FORM “C”
DRY CONTACTS
3A, 30VDC
RESET
INPUT COM
TRIGGER
N.C.
COM
N.O.
TIMER START
SWITCH
TIMER OVERRIDE
RESET (OPTIONAL)
*POWER IN
12-24 VAC/VDC
TO MAGNETIC LOCK
(FAIL SAFE MODE)
JUMPERS
15 SEC
RELAY MODE JUMPER
30 SEC 45 SEC LATCH
+
-
*POWER IN
≠≠VAC/VDC, 18 mA
TIMER
CONTROL
FORM “C”
DRY CONTACTS
3A, 30VDC
RESET
INPUT COM
TRIGGER
N.C.
COM
N.O.
19082 #6 - 32 x 5/16”
PHILLIPS PAN HEAD SCREW
(2) PROVIDED
CASE BASE
LT-1PCB
CASE TOP
FAIL SAFE MODE
WIRING DIAGRAM
FAIL SECURE MODE
WIRING DIAGRAM
12-24 VAC/VDC
12-24 VAC/VDC
UB-1/UB-2
UB-1/UB-2
BUTTON LED
CONTACT SET 1
CONTACT SET 2
MESSAGE LED
BUTTON LED
CONTACT SET 1
CONTACT SET 2
MESSAGE LED
NO COM
NO
NC
NC
COM
NO COM
NO
NC
NC
COM
+
–
RST
INPUT COM
TRIG
RELAY NC
RELAY COM
RELAY NO
+
–
RST
INPUT COM
TRIG
RELAY NC
RELAY COM
RELAY NO
LT-1
LT-1
DOOR
LOCK
RESET SWITCH
(OPTIONAL EXCEPT ON
LATCH TIMER SETTING)
DOOR
LOCK
RESET SWITCH
(OPTIONAL EXCEPT ON
LATCH TIMER SETTING)
ILLUMINATING GREEN
ILLUMINATING RED
SHOWN: POWER ON
NORMAL CONDITION
x x
x
ELECTRONIC INSULATION PAPER
IF TRACES ARE INADVERTENTLY CUT,
SOLDER JUMPER WIRES USING
APPROPRIATE HOLES.
RELAY MODE
N.O.
N.C.
NO CUT
CUT
15s
30s
45s
Ltch
Relay
NO
Relay
COM
Relay
NC
Trig Input
Com
Reset Power Input
+
-
12 to 24 Volts
AC or DC
MODEL LT-1
RELAY MODE
N.O.
N.C.
NO CUT
CUT
15s
30s
45s
Ltch
2306 Airport Rd • Waterford, MI 48327, USA
Phone: 248-673-9898 • Fax: 248-673-1246
Taylor House • 34 Sherwood Road • Bromsgrove, Worcestershire • B60 3DR • England
CONTACT RATINGS
Models: UB-1, UB-2, SS2xx4, SS2xx5, SS2xx7 and
SS2xxB ending with LTUL Form “C” Conacts are
rated 30 VDC, 3A.
WARRANTY
One year guarantee on electro mechanical and
electronic components.
Electronic warranty form at www.sti-usa.com/wc14.
UL294 Performance Levels:
Line Security: I
Attack: I
Endurance: IV
Standby Power: I
All manuals and user guides at all-guides.com
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