SARGENT Timer Model - TMR2 Multi-Function User Manual
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4.4 SW5: INPUT VOLTAGE SETTING
In the factory set (off) position this switch selects 24 volt (high) operation. Turning it on
selects 12 volt (low) operation. If the switch is in the "on" (low) position, the timer can be
damaged if operated on 24 volts.
5. RESET AND FLASH OUT TERMINALS
Terminal R is for reset. When it is momentarily connected to terminal "+", the unit resets
and goes into a condition equal to when it is first powered. When Dip Switches are
changed, the timer must be reset, either via terminal R or by unpowering and
repowering it. If this is not done, the changed Dip Switch settings may not be
read. The reset function is also useful to terminate a timing cycle early from an external
switch.
The F terminal (flash out) permits connection of an external LED. See Figure 3 for the
proper way to connect an external LED. The external LED will operate in the same way as
the LED on the board.
The LED provides a unique type of annunciation which depends on the operating mode
selected for the unit. For the modes which include timing, the LED will flash at an increasing
rate as the delay expires. An externally mounted LED can therefore provide a visual
indication for how much time remains. This is particularly useful for the longer time
ranges. For the operating modes which do not include timing (pulse output and toggle), the
LED follows the relay status. It is on when the relay is energized. This is also a useful
external visual indication.
FIG. 3: FLASH OUT CONNECTIONS TO EXTERNAL LED
When the time is set to zero in the cyclic mode, the flash out can be employed as an LED
flasher to annunciate some condition on a panel (see section 6.5). The F terminal can
only operate a resistive load of less than 60 mA or the board will be damaged. It
can not operate any incandescent lamp.
R
T
F
RESISTOR
LED
DIODE
RESISTOR
LED
AC C
O
NNECTION
DC CONNECTION
IF THE TIMEMASTER IS POWERED FROM A DC SOURCE, USE THE CONNECTIONS SHOWN AT THE LEFT.
IF IT'S POWERED FROM AN AC SOURCE, A DIODE MUST BE ADDED AS SHOWN ON THE RIGHT.
RESISTOR VALUE MUST BE CALCULATED
TO SUIT INPUT POWER AND LED TYPE.