Safety Technology International STI Latching/Timer Module Data Sheet
ACCESS HOUSING
STI LATCHING/TIMER
MODULE
LT- 1
SEE REVERSE
FOR DETAILS
LT-1UL
PRODUCT OVERVIEW
Our 12-24 VAC/VDC digital timer is a reliable and highly accurate simple solution to many
complex timing applications. A momentary contact closure begins the timing cycle (15,
30, 45 seconds or ∞) and latches a set of Form “C” dry contacts. The compact design
makes it versatile for many applications.
For example, when used on an egress door, the supervised contacts can be set to either
‘Fail Safe’ or ‘Fail Secure’ mode. A built-in reset feature allows the circuit to reset after a
single operation or a single door open and close (single passage) before timing expires.
This prevents re-entry of any unauthorized personnel.
KEY FEATURES
General Information
· Latching and/or timing module.
· Can be used as a latching module
for momentary buttons.
· Supervised relay drops out when
power is removed.
· Digital timing circuit 15, 30, 45
seconds or ∞.
· Easy to set modes.
· LT-1UL converts a momentary
button to a button with timing
options.
· Made in U.S.A.
· One year guarantee.
D
esign
· Compact size (1.28”H x 1.74”W
x .632”D) will fit inside Stopper
Stations or in a handi box behind a
flush mounted button.
LT-
·
1UL is designed to function with
any momentary access button.
Construction
· The LT-1UL Latching/Timer Module
is compatible with all UL Listed
Momentary Stopper® Station
buttons. It can also be used with
any UL Listed momentary button.
Installation
· Two modes ‘Fail Safe’ or ‘Fail
Secure’ installation.
· Supplied with double sided pad for
installation.
· All instructions are marked on the
board for easy installation or field
adjustment.
Electronics
· 12 to 24 volts AC/DC operation,
Form “C” contact rating 3A @
30VDC 125VAC.
Options
· Offers single reset operation when
installed with N.C. contact, unit will
automatically reset without waiting
for the timer to expire.
STI Latching/Timer Module
IF TRACES ARE INCORRECTLY CUT,
SOLDER JUMPER WIRES USING
APPROPRIATE HOLES.
RELAY MODE
N.O.
N.C.
POWER IN
N.C.
COM
N.O.
+
-
RESET
TRIGGER
IF TRACES ARE INADVERTENTLY CUT,
SOLDER JUMPER WIRES USING
APPROPRIATE HOLES.
RELAY MODE
N.O.
N.C.
RelayNORelay
COM
RelayNCTrig Input
Com
ResetPower Input
+
-
12 to 24 Volts
AC or DC
MODEL LT-1
RELAY MODE
N.O.
N.C.
NO CUT
CUT
15s
30s
45s
Ltch
Dimensions and Technical Information
MODELS AVAILABLE
LT-1 Latching/Timer Module
LT-1U L Latching/Timer Module UL Listed
Specs:
Dry Contacts
Circuit Requirements 12-24 VAC/VDC < 15mA
1.3 in.
(33mm)
3A 125 VAC
3A 30 VDC
POWER “ON” GREEN LED
RELAY ACTIVE RED LED
APPROVALS & WARRANTY
TESTING
LT-1UL has been tested and approved or listed by:
· UL/cUL Listed to UL 294
WARRANTY
One year guarantee on electro mechanical and electronic
components.
1.75 in.(44mm)
.65 in.
(16mm)
Printed in U.S.A., © 1987-2020 Safety Technology International, Inc.
08 /15Subject to change without notice.
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