Installation Instructions

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Page 1 Rev. D, 10/12

SECURITRON PRIME TIME MODEL DT-7

INSTALLATION AND OPERATING INSTRUCTIONS

1. DESCRIPTION

Securitron's Prime Time is a daily or weekly digital timer which operates on 12 to 24 volts AC or

DC and energizes and deenergizes a 10 Amp double pole, double throw relay according to

instructions set over a week. Toggle, or 2 types of pulsed relay operation may be selected.

2. POWER UP AND TIME SETTING

Identify terminals 1 and 2 marked "12-24 AC/DC". Apply a voltage source in this range to these

2 terminals. If a substantially greater voltage is applied the unit will be damaged.

Current drawn is 160 mA when the unit's relay is energized and 10 mA when the relay is

deenergized regardless of input voltage. Note that if DC voltage is used for power, polarity is

unimportant.

When power has been applied, the liquid crystal display on the rectangular plastic timer module

will come on showing the word "off" and "0000". The next step is to input the current time of

day into the timer module. To set the time of day, push and hold down the button farthest on

the left which shows the clock symbol. While holding this button down, set the hours by

repeatedly pushing the "H+" button. Note that if this button is held down, the hours will

automatically increment. Note also that the unit does not use AM and PM designation for the

hours, but rather employs military time based on a 24 hour system. For example, 22:00 hours

is the same as 10:00 PM.

In similar fashion, set the minutes by depressing the "M+" button while holding down the clock

symbol button. Finally, set the day of the week by pressing the day button while holding down

the clock symbol button. Once the time of day and the day of the week have been entered you

can release the clock symbol button.

FIG. 1: PRIME TIME OVERVIEW

BATTERY CLIP (AA CELL)

BACKS UP DISPLY MODULE

OBSERVE POLARITY

SELECT TOGGLE MODE

SELECT DOUBLE PULSE MODE

SELECT SINGLE PULSE MODE

DRY, DPDT, 10 AMP RELAY CONTACTS

FIRST MAN IN TERMINALS

BOARD POWER

12-24 VOLTS AC OR DC

NOTE: IF JUMPER BLOCK IS

MISSING, UNIT WILL NOT FUNCTION

SEE PARAGRAPH 6

Timer

Day

h+ m+

Reset

Summary of content (7 pages)

PAGE 1
Securitron Magnalock Corp. Tel 800.624.5625 www.securitron.com techsupport@securitron.com ASSA ABLOY, the global leader in door opening solutions SECURITRON PRIME TIME MODEL DT-7 INSTALLATION AND OPERATING INSTRUCTIONS 1. DESCRIPTION Securitron's Prime Time is a daily or weekly digital timer which operates on 12 to 24 volts AC or DC and energizes and deenergizes a 10 Amp double pole, double throw relay according to instructions set over a week.
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3. TOGGLE MODE The toggle mode is selected when the jumper block is set to the "J1" (factory set) position. Note that if the jumper block is missing, the relay will stay energized all the time and the unit will not perform any function. In the toggle mode, the Prime Time is programmed to turn electrical devices on or off at selectable times over a week period. The Prime Time accomplishes this by energizing or deenergizing a 10 Amp DPDT relay.
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relay is showing 'off'. Why doesn't it turn on?" The answer is that the DT-7 does not check what time it is and then look to see if it is "supposed" to be on or off. It just advances its clock, minute by minute, and when it encounters an instruction, it executes the instruction. On initial set-up, use the test button to put the unit in the desired initial state.
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5.1 BLOCK PROGRAMMING A common requirement is that programmed on/off times will be the same each day during the week and differ on the weekend. To achieve this result, it is not necessary to program on/off times separately for each day. Indeed, since there are only a total of 12 instructions, only 6 days can be handled with different on/off times. Block programming is used to handle this common need, which makes the Prime Time quick and easy to program.
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The best way to understand this feature is to use an application as an example. Returning to our example cited in section 5.3, a security system deactivates at 08:00 each morning and resecures at 17:00 hrs. Suppose everyone's late to work one day because (for instance) of bad weather. The facility will be completely unprotected. A better way to operate would be for the first man to arrive each morning to deactivate the system for the day after which it automatically reactivates at the end of the day.
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from other manufacturers will work (be sure to specify a 6 volt DC coil). This relay physical type is very common. FIG. 3: PRIME TIME WIRING EXAMPLES TYPICAL WIRING: TOGGLE MODE POWER SUPPLY 12-24 AC/DC 1 LOAD 3 2 4 NOTE: JUMPER BLOCK SET TOJ1 NOTE: LOAD USES SAME POWER AS DT-7. IF LOAD REQUIRES DIFFERENT POWER, SUCH AS 115 VAC, RELAY CONTACTS SHOULD BE ISOLATED FROM DT-7 POWER.
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8. DAYLIGHT SAVINGS TIME When the time changes twice a year to and from Daylight Savings Time, the time in the unit must be adjusted as with any clock. See section 2. for time setting. 9. POWER FAILURE CONSIDERATIONS If power is removed from the Prime Time, it will lose both the time and its programming and will have to be set up again from the beginning. In a DC application this can be forestalled by using a DC power supply with its own battery backup to operate the Prime Time.