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Circuitron Tortoise Switch Machines 5602 TD-1 TIME DELAY CIRCUIT

FDT Low Price: $39.99
Sale Price: $29.99
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Item Number: TOR00005602
Manufacturer: Circuitron Tortoise Switch Machines
Manufacturer Part No: 5602

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The CIRCUITRON TD-1 is designed to connect to the output of any
CIRCUITRON Detection Circuit (the DT-4 is the usual choice) and will provide a variable delay
period which can be used to control accessories, to provide automatic train stops, etc. The output
of the TD-1 is a single pole, double throw relay with 5 amp contacts. These contacts are
adequate for controlling locomotives in any scale, and they can be used to either make a circuit
connection for the time duration, or to break a circuit connection for the time duration. The TD-
1 requires an 11-14 volt DC power source for proper operation. Although the power source does
not need to be regulated, a filtered power source is preferred, and under no conditions should the
input voltage exceed 15 volts. Since the accessory terminals of most power packs will have
outputs in the 14-18 volt range, they are not a good choice for powering the TD-1. The Trigger
Terminals [T1 & T2] on the TD-1 require a momentary or continuous connection to ground [-] to
initiate the timing sequence. This connection can be supplied by CIRCUITRON Detection Unit
outputs, reed switches, track contacts, pushbuttons, etc. Once the timing sequence has been
started, further inputs to the Trigger Terminals will be ignored. Each of the two Trigger Terminals
provided [T1 & T2] can be used interchangeably. The reason we have chosen to provide two
separate terminals is so that closely spaced stopping points can be achieved. The ground signal [-]
to a Trigger Terminal must turn off for a 4-5 second period before that Trigger Terminal will again
respond to the ground signal. This is necessary to prevent unwanted triggering between cars if
the Opto-Sensor becomes partially unshaded. When the TD-1 is used with a detection circuit such
as a CIRCUITRON DT-4, the entire train must be clear of the Opto-Sensor for 4-5 seconds before
retriggering can occur. By utilizing both Trigger Terminals, the TD-1 can be made to delay twice in
quick succession, even before the train clears the first stopping point Opto-Sensor. If this is
confusing to you, just remember to alternate your detector connections to both [T1] and [T2] if
you desire closely spaced stopping points.

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