Overview:
The SignalGuys.com Start/Stop Work Timer
SS
PT724A
is an
extremely versatile 24 Hour 365 Day Event Timers designed to
support a wide
range of applications. Such applications include:
Start/Stop Work Time,
Home and Building Automation,
Security, Lighting
Control, Etc.
The
PT724A
timer board is
equipped with an independently controlled form “C” relay contact
that
provides many latching and/or momentary operations during a program schedule of your choice. The EE prom memory
allows for programming of unit prior to/or during field installation. Events may be set for single or multiple operations
on a daily and/or weekly schedule. The block programming feature enables repeating an event on any combination of
consecutive days. PT724A
will compensate for daylight savings time if desired. Individually select-
ed holiday exceptions can be programmed to over-ride regularly scheduled events.
Specifications:
• 12
0
volts AC operation
as wired from Factory.
• Standby current: 10mA (relay off) 50mA (relay on).
• Form “C” relay contacts are rated 10amp @120VAC/28VDC
-factory wired for 120 Vac output on contact closure
.
• EE Prom memory protects against loss of programming due to power failure.
• Accurate crystal controlled clock.
• Momentary and/or Latching Events.
• 50 individually programmed daily/weekly events.
• Block programming capacity can accommodate a total of 350 events per week.
• 10 programmable Holiday dates.
• “First man in” option.
• Alphanumeric LCD display simplifies programming.
• Standard or Daylight Savings Time settings.
• Automatic compensation for leap year.
• Lithium battery backup
optional --
maintains clock.
Enclosure Dimensions (approximate):
7.
5”H x 7.5”W x
5
”D
Installation Instructions:
1. Mount
Unit
in desired location.
Carefully Review:
Basic Operation
(pg. 2-3)
Terminal Identification Table
(pg. 3)
Push Button Layout and Description(pg. 3)
Programming Instructions
(pgs. 4-6)
2. Connect 12
0
volts AC
using AC power cord, or hardwire as desired.
.
3.
Do Not
Connect 12VDC battery (optional
, for unique applications
) to terminals marked [+ BAT -- 12VDC].
4.
L
ithium battery
is
optional--purchase battery 2032 locally
--only maintains clock time during a 120 vac power loss
.
5. Connect
horn
to be controlled to
the 120 Volt AC
outputs
labeled
"120 Vac Out"-- white and black wire with butt splices
.
Note:
Th
e
device is wired for 120 Volt AC output to Horns, etc, When
DC powered electromechanical devices such as
Mag Locks, Electric Strikes, Relays, etc.
are to be
install
ed, install
a catch diode across the pos (+) and neg (-) terminals
of the device. Connect diode as close to
the device as possible with the banded side fac
i
ng the pos (+) terminal.
This will reduce
i
nterference.
R
emove the
factory installed
120 VAC connections to the
N.O. and Common terminals.
6. Program clock and desired event schedule
(see programming instructions pg. 4-6)
.
Basic Operation:
PT724A controls an independently operated dry form “C” relay output. Relay can be programmed
to: turn on (latch), turn off (release latch) or pulse (momentary toggle)
, the PULSE is used for start stop work timer applications
at a specified time and day (this is referred to as
an event). Events are programmed via the push buttons and LCD display.
Events may be programmed to occur on any
day of the week at any time. In addition, events may be repeated at a specific
time on two (2) or more consecutive days
(i.e. M-F, Sun-Th, etc) Multiple combinations of individual and block events
may be programmed. Holiday exceptions
are individually selected by date and will over-ride all regularly scheduled events.
- 2 -