Light Engineered Displays TA Series - Digital Countdown Timer - Manual (Page 2)

TA
SERIES
TIMER / ABORT STATION
DIGITAL COUNTDOWN
The digital countdown timer is activated by contact closure and requires 24VDC power (filtered and regulated power recom-
mended but not required).
Panel operated ABORT contact may be connected to either reset or halt time.
The digital countdown timer uses its own internal clock and must be programmed to coincide with the time delay on the
control panel that powers it. Its use is for the reference of the time remaining between the start and finish of the suppression
system control unit time delay period. It is not an integral part of the suppression system control unit and does not affect the
control unit time delay settings. Load terminals may not be parallel linked. Each load is only capable of triggering its own,
independant load.
Operation
Switches S1 - S4 are used to set the initial count down time of the TA-123. Each is set to the digit of the initial count in the
format of MM:SS where MM is the minutes to count and SS is the seconds to count. You may set minutes to count on S1
and S2 (S1 is 19 min and S2 is 1 min) from 0 to 99 minutes. S3 and S4 set the seconds to count from 0 to 59 seconds. If
S1 and S2 are set to 00 minutes then S3 and S4 may be set from 0 to 99 seconds.
Time Setting Switches
J2 - Sonalert Enable. When enabled, the sonalert beeps once each second while the TA-123B is counting down. When the
count reaches 00:00 the sonalert changes from a beep to a solid tone until the trigger signal is removed.
J3 changes the RESET and HALT to respond to some 3rd part requirements. When J3 is not enabled, RESET will stop the
count, and when released, reset to the S1-S4 initial count time. When enabled, RESET will respond the same UNLESS the
count is at 10 seconds or less. When the count is 10 seconds or less, RESET will cause the count to stop and resume at 10
seconds when released. When J3 is enabled, HALT will count down UNTIL the count reaches 10 seconds at which point it
will hold. After HALT is released, the count will resume as normal from 10 seconds.
Optional Jumpers & Wiring
TRIG
RESET
HALT
GND
LOAD+
LOAD-
TRIG
ABORT
HALT
GND
LOAD+
LOAD-
TRIG
ABORT
+
-
+
-
+
-
+
-
HALT
GND
LOAD+
LOAD-
SINGLE
ABORT
MULTIPLE
ABORTS
IMPUT
ABORT ZONE
24vdc
POWER INPUT
2ND ZONE CONTACT
RESET
HALT
PANEL OPERATED
ABORT CONTACT
HOOKUP DIAGRAMS FOR
SINGLE AND MULTIPLE
TIMER/ABORT STATIONS
1 2 3
Shown
Enabled
J2
J3
}