PT2724
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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 events that 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 override all regularly
scheduled events.
Output Relay Modes:
Mode
Status
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
NO, C, NC, CH B
Dry Contact outputs used to switch controlled devices. When these relays 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 ~
AC or DC Input 12 to 24 volt. When using DC carefully observe polarity
+ BAT –
12VDC
12VDC stand-by battery input (battery leads provided).
FM
When this terminal is connected to DC neg. (–) the “First Man in” feature is enabled. The
relay will remain in its present position until this connection is terminated. At that time
the relay will resume normal operation and latest scheduled events will occur.
Fig. 1
SET
ENTER
UP
DWN
FM
+ BAT –
12VDC
+ DC –
AC
SW2
SW3
NO C NC NO C NC
RELAY ON
SU 01:01
ON
3V Lithium Battery Socket
(Altronix part # LB2032)
12-24 Volt
AC/DC input
