DHC-100
4 U.S. Patent 7,466,100 applies to this product PEAKTRONICS
POWER / SIGNAL (J2)
Power is connected to pins 1, 2, and 3 as shown in
the block diagram. The fuse installed on the unit is rated
for maximum output current that can be safely delivered
by the AC outputs. Replacement fuses must not exceed
the maximum rating to prevent damage to the unit.
Smaller fuse sizes can be used with smaller motors - con-
sult the actuator manufacturer for appropriate fuse size
and type.
An appropriate command signal, either 0-5V, 0-
10V, 1-5V, 2-10V, or 4-20mA, should be connected to pin
5 or 6 (as shown in the Block Diagram) while using pin 4
as the return signal ground. The DHC-100 must be con-
figured for the type of command signal that is to be used
(see COMMAND TYPE).
Pin 7 of J2 provides an auxiliary +5V output
which can be used to connect a command potentiometer.
By connecting one end of a potentiometer to pin 7, the
other end to pin 4, and the wiper to pin 6, a local control
knob can be implemented. Pin 8 provides an auxiliary
+15VDC output which can be used to power an input or
output 4-20mA transmitter.
ACTUATOR (J1)
The actuator motor and feedback potentiometer
are connected to J1 as shown in the Block Diagram. The
Motor Neutral wire must be connected to pin 2, while one
motor winding is connected to pin 1 and the other winding
to pin 3. The feedback potentiometer wiper must be con-
nected to pin 5, while one end is connected to pin 4 and
the other end to pin 6. The Polarity Detection feature of
the DHC-100 automatically determines which motor
winding to control based on where the open and closed
positions are set; this feature also eliminates the need to
rewire the unit for direct or reverse acting applications.
When the ▲ and ▼ buttons are used to control
the actuator, the ▲ button will turn on the motor winding
connected to pin 1, while the ▼ button will turn on the
motor winding connected to pin 3. See MANUAL/FB
POT CAL for more details.
OVERRIDE (J7)
J7 provides a simple 2-wire connection that can
override the DHC-100 to perform a variety of external
control functions. Using an appropriate interface module,
commonly used auto/manual station switches are easily
implemented with low voltage/low current switches. See
Special Applications for more details. The factory in-
stalled jumper between pins 1 and 2 enables normal opera-
tion of the DHC-100 and must be installed if the external
override functions are not used.
MODE
The MODE button is used to select the desired
function of operation. When the MODE button is pressed,
the unit will switch to the next function and the appropri-
ate LED indicator will turn on to let the user know which
function is selected. Except for the MANUAL/FB POT
CAL mode, the associated mode indicator will be steady
on; for some of the modes other indicators will flash to
indicate specific settings associated with the mode. Each
of the modes are described in more detail in the following
sections.
If a 0-5V or 0-10V command signal is used, the
LOSS OF COMMAND function cannot be used. The
MODE button will skip over the LOSS OF COMMAND
mode when the unit is configured for a 0-5V or 0-10V
command signal (see COMMAND TYPE). When the
OVERRIDE mode is enabled (see OVERRIDE MODE),
the MODE button is disabled and the Manual/FB Pot Cal
indicator will turn on steady.
ADJUST UP (▲) and ADJUST DOWN (▼)
The adjust up (▲) and adjust down (▼) buttons
are used to adjust the setting of any given function. When
a function is selected by the MODE button, the adjust but-
tons will affect that function only. Note, that the AUTO
mode does not have any adjustable settings, and therefore,
the adjust up (▲) and adjust down (▼) buttons have no
effect. Also, the adjust buttons are disabled in the
OVERRIDE mode.
OVERRIDE MODE
The OVERRIDE mode is not selected by the
MODE button and can be enabled at anytime by connect-
ing a resistance greater than 250 ohms to the Override In-
put (J7 pin 1 and pin 2). While the OVERRIDE mode is
enabled, the MODE button and adjust buttons are disa-
bled, and the Manual/FB Pot Cal indicator will turn on
steady to indicate that the unit is being controlled by the
Override Input. Shorting J7 pin 1 to pin 2 returns the unit
to normal operation and the previously selected mode.
Note that earlier models may not have connector J7, and
therefore do not have the OVERRIDE mode feature.
Controlling the DHC-100 from the Override Input
is accomplished by connecting a specific resistance to se-
lect a specific operation. The table below defines the op-
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