Altronix PT2724 Installation Instructions

PT2724 - Two (2) Channel
365 Day 24 Hr. Timer/Controller

Overview:

This unit is an extremely versatile two channel 365 Day 24 Hour Timer / Controller designed to
support a wide range of applications. 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 operations on a daily and/or weekly schedule. The block programming
feature enables repeating an event on any combination of consecutive 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.

• Stand-by current: 10mA (relay off) 50mA for each channel (relay on).

• Two (2) form “C” relay contacts are rated 10 amp @120VAC/28VDC.

• Tandem relay mode - allows both channels to activate simultaneously for all events.

• 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.

• Ten (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) (Altronix part # LB2032).

• User friendly programming.
Board dimensions (approximate): 5.25”W x 3.5”L x 1.5”D

Installation Instructions:

1. Mount PT2724A in desired location.

Carefully Review:
Basic Operation (pg. 2)
Terminal Identification Table (pg. 2)
Push Button Layout and Description (pg. 3)
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, pgs. 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 programmed 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.
Disable - Used to cancel an existing programmed event.
Pulse - Momentarily energizes the relay for a selectable time period of 1 sec. to 15 secs.
Time is displayed in 24 hr. military format.

Terminal Identification Table:

Terminal Legend Function/Description

NO, C, NC, CH A Dry Contact outputs used to switch controlled devices. When these relays
NO, C, NC, CH B are energized (ON) the NC and C terminals are open and the NO and C

+ DC -- AC or DC Input 12 to 24 volt. When using DC carefully observe polarity.

~ AC ~

+ BAT -- 12VDC stand-by battery input (battery leads provided).
12VDC

FM When this terminal is connected to DC neg. (-) the “First Man in” feature

terminals are closed. When this relay is de-energized (Off) the NC and C
terminals are closed and the NO and C terminals are open.

is enabled. Both relays will remain in their present position until this
connection is terminated. At that time relays will resume normal
operation and latest scheduled events will occur.

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SET

ENTER

UP

DWN

FM

+

BAT ---

12VDC

+

DC ---

AC

SW2

SW3

NO C NC NO C NC

RELAY ON
SU 01:01

SET

ENTER

UP

DWN

Fig. 1

12-24 Volt

AC/DC input

3V Lithium Battery Socket

(Altronix part # LB2032)

Push Button Layout:

Push Button Description Table:

Push Button Function/Description

SET Scrolls thru program fields. Escapes out of existing programming.

ENTER Accepts programmed data.

UP Scrolls up through data selections.

DWN Scrolls down through data selections.

UP and DOWN keys can be used to select data entries. After scrolling to the correct entry,
depress ENTER to accept.

SW2 clip SW Selects tandem or individual relay operation.

SW3 slide SW Selects channel to be programmed.

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