Overview:
Model PT2724 is an extremely versatile two channel 365 Day 24 Hour Timer / Controller designed to support a wide range of appli-
cations. Such applications include: Home and Building Automation, Security, Access Control, Lighting Control, Etc.
The PT2724 is equipped with two 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 oper-
ations on a daily and/or weekly schedule. The block programming feature enables repeating an event on any combination of consec-
utive days. PT2724 will compensate for daylight savings time if desired. It automatically adjusts for leap year and individually
selected holiday exceptions can be programmed to over-ride regularly scheduled events.
Specifications:
• 12 to 24 volts AC or DC operation
• Standby current: 10mA (relay off) 50mA for each channel (relay on).
• Two (2) form “C” relay contacts are rated
10amp @120VAC/28VDC.
• Tandem relay mode (converts 2 SPDT contacts to 1 DPDT contact).
• EE-Prom program memory protected against power loss.
• Accurate crystal controlled clock.
• Momentary and/or Latching Events.
• 50 individually programmed daily/weekly events per channel.
• Block programming capacity can accommodate a total of 350 events per week per channel.
• 10 programmable Holiday dates per channel.
• “First man in” option.
• Alphanumeric LCD display simplifies programming.
• Standard or Daylight Savings Time settings.
• Automatic compensation for leap year.
• Built-in charger for 12VDC sealed lead acid or gel type batteries (Max charge current 100mA).
• Lithium battery backup maintains clock (optional).
• User friendly programming.
Board dimensions: 5.25” x 3.5” x 1.5”
Installation Instructions:
1. Mount PT2724A in desired location / enclosure.
Carefully Review:
Basic Operation
(pg. 2)
Terminal Identification Table
(pg. 3)
Push Button Layout and Description
(pg. 3-4)
Programming Instructions
(pgs. 4-7)
2. Connect 12 to 24 Volts AC or DC to terminals marked [+ DC -- ~AC~ ]. (when using DC carefully observe polarity).
3. Connect 12VDC battery (optional) to terminals marked [+ BAT -- 12VDC].
4. Insert lithium battery (optional/not included. Order part LB2032) in battery
holder as shown in fig. 1 pg. 3. with the + positive side facing up.
5. Connect devices to be controlled to the dry relay outputs of either Channel A or Channel B.
Note: It is important when connecting DC powered electromechanical devices such as Mag Locks, Electric Strikes, Bells, Relays,
etc. to 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 facing the pos (+) terminal. This will reduce the possibility of interference.
6. Program clock and desired event schedule (see programming instructions pg. 4-7).
Basic Operation:
PT2724 controls two independently operated dry form “C” relays. Relays can be programmed to: turn on (latch), turn off (release
latch) or pulse (momentary toggle) 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 pro-
grammed as a block event which repeat at a specific time on two (2) or more consecutive days (i.e. MO-FR, SU-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.
The four (4) output relay modes consist of:
Relay OFF - De-energizes the relay until a relay ON event is detected
Relay ON - Energizes the relay until a relay OFF event is detected.
PT2724 - Two Channel
365 Day 24 Hr. Timer/Controller
IIPT2724-Rev. 060500
Altronix is not responsible for any typographical errors. Product specifications are subject to change without notice.
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