01-22-04 PRELIMINARY INFORMATION
DHC-100
PEAKTRONICS
U.S. Patent 4,803,481 applies to this product; other patents pending
5
MANUAL/FB POT CAL
The MANUAL/FB POT CAL function allows
manual operation of the actuator by using the adjust but-
tons (▲ and ▼) without affecting any other settings within
the DHC-100. When the ▲ button is pressed, the motor
winding connected to J1-1 is turned on while the ▼ button
turns on the J1-3 winding. Whether the actuator moves
toward the open or closed position depends on which mo-
tor winding is connected to J1-1 and J1-3.
The POT CAL feature provides an indication of
the feedback potentiometer's setting. When the MANU-
AL/POT CAL function is selected, the Manual/Pot Cal
indicator will turn on - it may flash or be on steady, de-
pending on the actuator position. The indicator will be on
steady whenever the DHC-100 detects that the feedback
potentiometer is at midrange of its rotation. As the actua-
tor moves, causing the feedback potentiometer to move
away from midrange, the indicator will begin to flash, and
the indicator will flash at a decreasingly slower rate as the
actuator moves further away from midrange.
By using the adjust buttons to position the actua-
tor to midstroke (half way point between the desired open
and closed positions), the feedback potentiometer can then
be adjusted until a steady light occurs. This insures that
the feedback potentiometer has maximum range to reach
the open and closed positions.
CLOSE
The CLOSE function is used to set the desired
closed position; however, prior to doing this, the feedback
potentiometer should be checked for optimum position
(see MANUAL/POT CAL). In the CLOSE function, the
adjust buttons are used to set the actuator to any desired
position, and upon pressing the MODE button (to select
the next function, OPEN), the DHC-100 will retain the
setting as the defined closed position.
Upon selecting the CLOSE function, the DHC-
100 will begin moving the actuator to the previously set
closed position; it is not necessary to make an adjustment
if the unit has been previously set to the desired position.
A command signal input of 0V, 1V, 4mA, or 0% auto-
matically corresponds to the defined closed position.
OPEN
The OPEN function works the same way as the
CLOSE function with the exception that the adjust buttons
are used to set the desired open position. As with the
CLOSE function, upon selecting the OPEN function, the
actuator will move to the previously set open position.
Once the desired position is set, the DHC-100 will auto-
matically correspond a command signal input of 10V, 5V,
20mA, or 100% to the open position.
AUX CLOSE OUTPUT
The AUX CLOSE OUTPUT function is used to
set an optional output setting that is associated with the
closed position - an appropriate relay option module is
required to use this output. The adjust buttons are used to
set the actuator to a desired position. Whenever the actua-
tor position falls between the defined closed position and
the Aux Close position, the Aux Close Output indicator
will flash. Additionally, the DHC-100 will turn on a relay
output on the optional relay module - the output can be
used to drive an alarm or merely act as an auxiliary limit
switch.
Upon selecting the AUX CLOSE OUTPUT func-
tion, the DHC-100 will begin moving the actuator to the
previously set position. It is not necessary to make an ad-
justment if the unit has been previously set to the desired
position.
AUX OPEN OUTPUT
The AUX OPEN OUTPUT function is used to set
an optional output setting that is associated with the open
position - an appropriate relay option module is required
to use this output. The adjust buttons are used to set the
actuator to a desired position. Whenever the actuator po-
sition falls between the defined open position and the Aux
Open position, the Aux Open Output indicator will flash.
Additionally, the DHC-100 will turn on a relay output on
the optional relay module - the output can be used to drive
an alarm or merely act as an auxiliary limit switch.
Upon selecting the AUX OPEN OUTPUT func-
tion, the DHC-100 will begin moving the actuator to the
previously set position. It is not necessary to make an ad-
justment if the unit has been previously set to the desired
position.
COMMAND TYPE
The COMMAND TYPE function is used to
configure the command signal input for either 4-20mA, 1-
5V, 0-5V, 0-10V, or digital so as to match the type of
command signal being used. Upon selecting the
COMMAND TYPE function, the Command Input
indicator will turn on steady, while the indicator for the
selected type will flash Use the adjust buttons (▲ or ▼)
to select the desired input type. The selection will be
saved when the MODE button is pressed, which will also
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