Securitron DT-7 - Manual (Page 2)

PN# 500-11800
Page 2 Rev. C, 02/11
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. Note the terminal strip
with 6 terminals marked "C", "NC", and "NO" for each pole. Devices to be controlled by the
Prime Time should be connected to these terminals which are isolated (dry) relay contacts.
Note on the display that the term "off" appears to the left of the hours display. This indicates
that the relay is off or deenergized. Note finally the long push button on the timer module with
a hand symbol printed next to it that is situated below the "H+" and "M+" push buttons.
Pressing this button while the unit is in operating mode (time is showing) will allow you to
manually energize and de-energize the relay. As you do this the display will change from "off"
to "on" and back again. This is useful for testing and for temporarily changing the state of the
relay.
4. PULSE MODES
Moving the jumper block to position "J2" selects the double pulse mode. In this mode, when
the display module executes an "on" or "off" instruction, the relay pulses (energizes) for 1
second and then returns to a deenergized state. This is useful for controlling devices that
require a momentary pulse to turn on and off such as many alarm panels. In the pulse modes,
the test button function and relay connections are the same as in the toggle mode described in
the previous section. As you use the test button, the display will change from "on" to "off" (and
back), and you will be able to see and hear the relay contacts switching for one second.
Remember, the pulse modes affect what the relay does, not how the display changes.
Moving the jumper block to position "J3" selects the single pulse mode. In this mode, the
relay will pulse when an "on" instruction executes (display changes from "off" to "on") but not
when an "off" instruction executes. This allows sending a pulse signal once a week- to test a
dialer for example. When working with any of the modes, liberal use of the test button will
permit easier understanding.
5. PROGRAMMING
To program the on/off times, depress the push button marked "timer" once. This enters the
programming mode. The display will now change and indicate "timer 1 on". Pressing the timer
button again will display "timer 1 off". If you continue to depress the timer button, you will step
through 6 "on" timers and 6 "off" timers. These represent a total of 12 program instructions. At
start up, all of the instructions are inactive, which is indicated by the fact that they do not show
any time or day but merely show horizontal lines. To make any of the 12 instructions active,
you must input an hour, minute, and day by pressing the "H+", "M+" and day buttons just as
you did when you first set the time. If, however, a day of the week is not input, the
instruction will be executed daily. This is how to use the Prime Time to execute the same
program each day.
When an "on" instruction executes in the toggle mode, it will energize the relay on the time and
day selected. In the double or single pulse mode the relay will energize for 1 second. An "off"
instruction will deenergize the relay in the toggle mode, pulse it in the double pulse mode and
have no effect in the single pulse mode. If the display is already "on" and an "on" instruction
executes, nothing will happen. Programmed instructions only function when they change the
state of the display. The relay then responds according to the mode selected. All 12 instructions
may, if desired, be used during the same day or be spread out throughout the week which is
more common. The fact that the instruction sets are labeled 1 through 6 has no significance.
The instructions will be executed whenever the time and date of the instruction occurs.
It is important to understand how the unit works in terms of executing its program. Think of the
programmed "on" and "off" instructions as markers on a 7 day schedule. Then think of the
digital clock as moving through this 7 day period, minute by minute. When the clock encounters
an instruction, it will execute the instruction by turning on or off (if it is not already in the state
called for in the instruction). Sometimes, we get the following type of question from an installer
on initial set-up: "I put in an 'on' instruction for 8:00 am today. It's now 10:00 am and the