Altronix PT2724 Installation Instructions - Manual (Page 2)

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
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.
+ 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
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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