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DHC-300
DETECTION FEATURE). 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-300 will retain the
setting as the defined closed position.
Upon selecting the CLOSE function, the DHC-
300 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% automat-
ically 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-300 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-300 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-300 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
6
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-300 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.
tion, the DHC-300 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
figure the command signal input for either 4-20mA, 1-5V,
0-5V, 0-10V, or Digital so as to match the type of com-
mand 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 advance the unit to the LOSS
OF COMMAND function.
LOSS OF COMMAND
for the command signal, the DHC-300 will detect when
the command signal is lost or out of range. A loss of com-
mand condition is detected whenever the input is discon-
nected, the input becomes less than 0.75V or 3mA, or the
input becomes greater than 5.5V or 22mA. If the DHC-
300 detects a loss of the command signal, the Fault indica-
tor will flash and the actuator will be moved to one of
three preset positions: the open position, the closed posi-
tion, or the position last attained prior to losing the com-
mand signal. The LOSS OF COMMAND function is used
to set the desired default position.
lected, the adjust buttons are used to set the default posi-
tion. The DHC-300 indicates the selected default setting
by flashing the Open function indicator for the open de-
fault position, or it will flash the Close function indicator
for the closed default position. When neither indicator is
on, then the "last position" default is selected.
loss of command signal cannot be detected. Therefore, if
the unit is configured for a 0-5V or 0-10V command sig-
nal (see COMMAND INPUT), the MODE button will not
select the LOSS OF COMMAND function.
U.S. Patent 7,466,100 applies to this product
Upon selecting the AUX OPEN OUTPUT func-
The COMMAND TYPE function is used to con-
When using 1-5V, 4-20mA, or a Digital input type
When the LOSS OF COMMAND function is se-
When a 0-5V or 0-10V command signal is used, a
PEAKTRONICS
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