Peaktronics DHC-301 User manual

U.S. Patent 7,466,100 applies to this product
PEAKTRONIC
S
The Peaktronics DHC-301 is a 2nd generation high
performance digital positioner intended to control 3-phase
actuators, providing up to 450 points of resolution with
quarter turn actuators ranging from 5 sec to 120 sec and
rated for 25% duty or more. The DHC-301 has many au-
tomatic advanced features that will enhance any actuator
while making it easy to install and set up.
The simple three button control is used to configure
all parameters the unit needs for a wide variety of applica-
tions, and allows the open and closed positions to be easily
set for direct or reversing acting without any rewiring. The
unit can be configured for various command types (4-
20mA, 1-5V, 0-5V, 0-10V, 2-10V, or a Digital command)
and its default operation upon loss of command.
Various option modules are easily plugged into the
unit, providing other features such as a position feedback
signal (current or voltage), auxiliary switches, fault relay
contact, or digital communications. A wide range of data is
accessible through a digital communications module,
providing additional control or information.
The unit is of single solid construction and is easily
mounted with two screws. The DHC-301 is a Peaktronics
standard size positioner and directly replaces 1st generation
DHC-300 controllers.
DHC-301
Digital High-Resolution
3-Phase Controller
DHC-301 117VAC
FEATURES
 Can position to ±0.1, and can be used with quarter-turn actuators ranging from 5 sec to
120 sec.
 Adaptive Control feature continuously adjusts for load and actuator conditions and
eliminates calibration procedures and auto-cal operations.
 Three button control provides easy setup and eliminates the need for instrumentation.
 Polarity Detection feature allows direct or reverse acting operation without re-wiring.
 Stall Detection feature protects actuator motor from a stall condition.
 Automatic Duty Cycle Control feature prevents shutdown of a process due to a ther-
mal overload of the actuator motor, and allows actuators rated for 25% duty or more to
be safely used.
 Operating temperature range of 0 to 60C

DHC-301
2 U.S. Patent 7,466,100 applies to this product PEAKTRONICS
OUTLINE
DHC-301 117VAC
1
2
CONTROL 1 OUT
to Solid State Relay
+15V OUT
1
2
3
4
5
6
8
+5V OUT
VOLTAGE CMD (+)
4-20mA CMD (+)
SIGNAL GND ( )
EARTH GND
L1 LINE
L2 NEUTRAL
to AC Power
to Signal
ELECTRICAL
CONNECTIONS
J1
J2
7
J3
OPTION MODULE
CONNECTOR
+2.5V
1
2
3
WIPER
GND
to Feedback Pot J6
CONTROL 2 OUT
1
2
OVERRIDE INPUT
to Auto/Manual Station J7
GND
J2J6 8765432132121
J3
FUSE
3.50" 0.25"
0.25"
#6 clear hole
(2) places
1.36"
1.36"
*1.32"
J1
J7
* Add 0.04" when option module installed.
FRONT PANEL
AUTO
MANUAL / FB POT CAL
CLOSE
OPEN
AUX CLOSE OUTPUT
AUX OPEN OUTPUT
COMMAND TYPE
LOSS OF COMMAND
DIGITAL
4-20mA
1-5VDC
0-5VDC
0-10VDC
LAST
MODE
Digital High Resolution
(BOTH OFF)
PEAKTRONICS
POSITION OUT CAL
FAULT
2-10VDC

DHC-301
PEAKTRONICS U.S. Patent 7,466,100 applies to this product 3
BLOCK DIAGRAM
POWER / SIGNAL
NOTE: See input signal
configurations for more
information.
WIPER
2
+2.5V
1GND
3
8
7
6
5
4
+15V OUTPUT
+5V OUTPUT
SIGNAL GND
3
2
1
L2 NEUTRAL
EARTH GND
L1 LINE
2
1
DHC-301
SOLID STATE
RELAY
BLOCK
FEEDBACK POT
J6
J1
J2
AUTO/MANUAL
STATION
OVERRIDE MOTOR
J7
2
1GND
OVERRIDE
INPUT
3-PHASE POWER
L2 L3L1 L1
L2
L3
See Output Configurations
See Special Applications
MOTOR
4-20mA CMD (+)
VOLTAGE CMD (+)
CONTROL 1 OUT
CONTROL 2 OUT
CLOSE LIMIT
OPEN LIMIT
DESCRIPTION
The DHC-301 is powered by a secondary source of
117 VAC 10%. The unit is easily mounted with 2 screws
and is equipped with removable screw terminals that pro-
vide for easy field wiring. The unit's size and mounting are
compatible with Peaktronics standard positioners and can
be mounted with any Peaktronics mounting kit for standard
positioners.
The simple three button control (MODE, ▲, and
▼) allows the user to perform a complete set-up from the
unit itself without the need for any instrumentation. The
adaptive control feature of the DHC-301 eliminates the
need for any calibration steps. In the simplest application,
only the closed and open positions need to be set and the
unit automatically and continuously sets all other parame-
ters when placed in the AUTO mode.
CAUTION ! These units are intended to be
mounted in an appropriate enclosure to avoid
electrical shocks. High voltages are present
on the outside of the unit when power is ap-
plied. AC power should be disconnected
prior to any wiring of these units. A heater
and thermostat should be used where conden-
sation may occur.

DHC-301
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 and is provided by a secondary AC
source separate from the 3-phase motor power. The fuse
installed on the unit is rated for safe operation of the unit.
Replacement fuses should be of an equivlent size and
type. Other fuse types can be used - consult the factory
for appropriate substitutes.
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-301 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.
MOTOR (J1)
The motor control outputs, Control 1 Out (pin 1)
and Control 2 Out (pin 2), provide a digital signal (in re-
spect to J6-1) for driving 3-phase solid state relays that are
used to control the motor. Pin 1 is set to approximately
+4V to turn the motor on toward open, and pin 2 is set to
approximately +4V to turn the motor on toward closed.
Both outputs are set to 0V to turn the motor off. See Out-
put Configurations for details on wiring and recommended
components.
When the ▲ and ▼ buttons are used to control
the actuator, pin 1 is set to +4V when the ▲ button is
pressed, while pin 2 is set to +4V when the ▼ button is
pressed. See MANUAL/FB POT CAL for more details.
FEEDBACK POT (J6)
The feedback potentiometer is connected to J6 as
shown in the Block Diagram. The feedback potentiometer
wiper must be connected to pin 2, while one end is con-
nected to pin 1 and the other end to pin 3. The Polarity
Detection feature of the DHC-301 automatically deter-
mines which motor direction 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.
OVERRIDE (J7)
J7 provides a simple 2-wire connection that can
override the DHC-301 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-301 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 is 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-

DHC-301
PEAKTRONICS U.S. Patent 7,466,100 applies to this product 5
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.
Controlling the DHC-301 from the Override Input
is accomplished by connecting a specific resistance to se-
lect a specific operation. The table below defines the op-
erations and their associated resistance. See Special Ap-
plications for details on using the Override Input for an
Auto/Manual Station.
RESISTANCE OPERATION
> 4.3K ohms OFF
3.3K ohms ±5% LATCH
2K ohms ±5% OPEN
1.2K ohms ±5% CLOSE
510 ohms ±5% STOP
The OPEN function will operate the motor in the
open direction as set by the OPEN mode, while the
CLOSE function operates the motor in the closed direction
as set by the CLOSE mode. The LATCH function will
maintain the previously selected function; this allows
momentary switches to be used for the OPEN and CLOSE
functions. The OFF and STOP functions turn the motor
off, which also unlatches the OPEN or CLOSE functions.
Note that the OPEN and CLOSE functions may
work in reverse until the open and closed positions are set
by the OPEN and CLOSE modes. The DHC-301 will au-
tomatically turn the motor off when the open or closed
positions are reached. However, if a feedback fault occurs
(see FAULT INDICATORS), the motor will be turned on
for a period of 15 minutes in the selected direction. For
this reason, limit switches should be used when using the
OVERRIDE mode, and should be set to a position ac-
ceptable for the application. The 15 minute period can
also be terminated using the OFF or STOP function.
The motor is also automatically turned off if the
DHC-301 detects a stall (see STALL DETECTION). An
OPEN or CLOSE operation can be attempted again after
switching to the OFF, LATCH, or STOP functions first.
AUTO
The AUTO function is the normal mode of opera-
tion for the DHC-301; all the other functions are used to
set up the unit. While in AUTO, the unit can be controlled
by various external signals, some of which can be selected
by the COMMAND TYPE function. When the unit is not
in the AUTO mode, all external controls described below
will be disabled.
Once the open and closed positions have been set,
the AUTO mode will control the position of the actuator
according to the command input signal. For an input sig-
nal of 0V (for 0-5V or 0-10V input), 1V (for 1-5V input),
2V (for 2-10V input), 4.0 mA (for 4-20mA input), or 0%
(for a Digital input), the DHC-301 will position the actua-
tor to the closed position as set by the user. Conversely,
an input of 10V, 5V, 20mA, or 100% will position the
actuator to the defined open position.
When the DHC-301 is configured to use a 0-5V,
0-10V, 1-5V, 2-10V, or 4-20mA command, the command
signal should be connected to the appropriate pin on J2 -
note that the unused input pin must be left unconnected.
When the DHC-301 is configured for a Digital command
type, an appropriate communications option module must
be installed. A communications module may be installed
when using one of the analog command types and can be
used to override the analog command. The AUTO indica-
tor will flash whenever the unit is being controlled by the
communications module.
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 with-
in the DHC-301. When the ▲ button is pressed, the Con-
trol 1 output (J1-1) will be +4V in respect to J6-1. When
the ▼ button is pressed, the Control 2 output (J1-2) will
be +4V in respect J6-1. The FB POT CAL feature pro-
vides an indication of the feedback potentiometer's setting.
When the MANUAL/FB POT CAL function is selected,
the Manual/FB Pot Cal indicator will turn on - it may flash
or be on steady, depending on the actuator position. The
indicator will be on steady whenever the DHC-301 detects
that the feedback potentiometer is at midrange of its rota-
tion. As the actuator moves, causing the feedback poten-
tiometer to move away from midrange, the indicator will
begin to flash, and the indicator will flash at a decreas-
ingly 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/FB POT CAL), and the limit switches
should be set outside of the operating range (see STALL

DHC-301
6 U.S. Patent 7,466,100 applies to this product PEAKTRONICS
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-301 will retain the
setting as the defined closed position.
Upon selecting the CLOSE function, the DHC-
301 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, 2V, 4mA, or 0% au-
tomatically 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-301 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-301 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-301 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-301 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-301 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 con-
figure the command signal input for either 4-20mA, 1-5V,
0-5V, 0-10V, 2-10V, or Digital so as to match the type of
command signal being used. Upon selecting the COM-
MAND TYPE function, the Command Type 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
When using 1-5V, 2-10V, 4-20mA, or a Digital
input type for the command signal, the DHC-301 will de-
tect when the command signal is lost or out of range. A
loss of command condition is detected whenever the input
is disconnected, the input becomes less than 0.75V (for 1-
5V input), 1.5V (for 2-10V input) or 3mA, or the input is
connected backwards. An out of range condition is de-
tected whenever the input becomes greater than 5.25V (for
1-5V input), 10.5V (for 2-10V ipnut), or 21mA. If the
DHC-301 detects a loss of the command, a fault will be
indicated (see FAULT INDICATORS), and the actuator
will be moved to one of three preset positions: the open
position, the closed position, or the position last attained
prior to losing the command signal. The LOSS OF
COMMAND function is used to set the desired default
position.
When the LOSS OF COMMAND function is se-
lected, the adjust buttons are used to set the default posi-
tion. The DHC-301 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.
When a 0-5V or 0-10V command signal is used, a
loss of command signal cannot be reliably detected.
Therefore, if the unit is configured for a 0-5V or 0-10V
command signal (see COMMAND TYPE), the MODE
button will not select the LOSS OF COMMAND function.

DHC-301
PEAKTRONICS U.S. Patent 7,466,100 applies to this product 7
However, the DHC-301 can detect when a 0-5V or 0-10V
command signal is out of range (i.e., greater than 5.25V or
greater than 10.5V) or connected backwards. When an
out of range condition is detected for a 0-5V or 0-10V in-
put, the motor is turned off (leaving the actuator in its "last
position") and a fault will be indicated (see FAULT IN-
DICATORS).
POSITION OUT CAL
The POSITION OUT CAL function is used to
calibrate an optional feedback transmitter output. An ap-
propriate transmitter option module is required to use this
feature. When the POSITION OUT CAL function is first
selected (by pressing the MODE button while in the LOSS
OF COMMAND function), the CLOSE indicator will
flash, and the voltage or current associated with the closed
position will appear at the option module output. If de-
sired, the output can be adjusted (using the adjust buttons)
to any value from 0 to 10V (for a voltage output) or 4 to
20mA (for a current output). The new setting is saved
when the MODE button is pressed.
Pressing the MODE button again will leave the
unit in the POSITION OUT CAL function except that the
OPEN indicator will flash, and the output voltage or cur-
rent associated with the open position will appear at the
option module output. Like the closed setting, the output
can be adjusted to any voltage (from 0 to 10V) or current
(from 4 to 20mA), and the new setting is then associated
with the open position.
FAULT INDICATORS
The DHC-301 detects various fault conditions that
prohibit the unit from controlling the actuator. A combi-
nation of the three Fault indicators (red, yellow, and
green) will turn on or flash to indicate a specific detected
fault. If an appropriate relay option module is installed,
the Fault relay output on the option module will turn off
(indicating a fault) when any of the Fault indicators turn
on or flash. A communications option module can also
read the specific conditions causing a fault. Note that a
fault condition DOES NOT disable the motor outputs
when manually controlling the actuator with the adjust
buttons; while useful for troubleshooting, care should be
exercised when operating the motor under a fault condi-
tion. The OVERRIDE mode can also operate the motor
when a fault condition exists - see OVERRIDE MODE for
details.
Note that the indicators may not indicate all the
fault conditions that may exist. This means that when the
indicated fault is corrected, the unit may display another
fault that has not been corrected. The following table pro-
vides a summary of the Fault indications which is fol-
lowed by a description of each fault.
RED YEL GRN FAULT
ON flash OFF Motor 1 No Motion (Stall)
ON OFF flash Motor 2 No Motion (Stall)
ON flash flash Double No Motion (Stall)
OFF OFF flash Feedback Alarm
OFF flash OFF Loss of Command
OFF ON OFF Command Out of Range
OFF flash flash Feedback Alarm and
Loss of Command
OFF ON flash Feedback Alarm and
Command Out of Range
Motor 1 No Motion (Stall) - A fault condition is detected
when no actuator motion is detected while the Motor 1
output is turned on. The fault condition will disable the
Motor 1 output only, and the fault is cleared when the
DHC-301 detects a motion greater than 1.5 in either di-
rection. The fault can be cleared if 1) the command signal
commands a Motor 2 operation, 2) manual operation with
the adjust buttons results in a motion greater than 1.5, or
3) a mechanical manual override forces the 1.5 motion,
provided the mechanical motion is monitored by the feed-
back pot.
Motor 2 No Motion (Stall) - A fault is detected when no
actuator motion is detected while the Motor 2 output is
turned on. The fault can be cleared in the same manner as
a Motor 1 Stall (see above).
Double No Motion (Stall) - If the DHC-301 detects no
actuator motion in either direction, both motor outputs
will be disabled. The command signal cannot clear this
condition; only manual operation or a mechanical over-
ride can clear the fault. Alternatively, the DHC-301 can
be powered off and then on to temporarily clear the fault;
however, this practice should be avoided without perma-
nently correcting the cause of such a fault.
Feedback Alarm - A fault condition is detected whenever
the feedback signal is out of range (that is, less than 5% of
the potentiometer value or more than 95% of the potenti-
ometer value), or when any of the potentiometer connec-
tions are broken. Normal operation resumes when the
potentiometer is reconnected or back in range.
Loss of Command - If the command signal is disconnect-
ed, the fault indication will remain on until the signal is
reconnected. See LOSS OF COMMAND for details.

DHC-301
8 U.S. Patent 7,466,100 applies to this product PEAKTRONICS
Command Out of Range - If the command signal goes
out of range, the fault indication will remain on until the
signal is back in range. See LOSS OF COMMAND for
details.
STALL DETECTION FEATURE
The Stall Detection feature of the DHC-301 (see
FAULT INDICATORS) essentially performs a similar
function as commonly used torque switches; however, the
differences should be considered before eliminating the
torque switches. The DHC-301 feature does not measure
torque, but rather motion; if the load is sensitive to exces-
sive torque, the torque switches may be desirable. Since
common torque switches are mechanical devices, they can
provide a fail safe feature in the event of electrical failures
(such as shorted wires or damage to the DHC-301).
The Stall Detection feature is useful for detecting
when any of the motor wires become disconnected. How-
ever, limit switches employed in actuators essentially dis-
connect one of the motor windings. The DHC-301 will
detect this as a motor stall. To avoid this condition, the
limit switches must be set outside of the operating range
set by the CLOSE and OPEN functions.
DUTY CYCLE CONTROL FEATURE
The Duty Cycle Control feature of the DHC-301
allows actuators rated at 25% duty or more to be safely
used in automated valve applications. The DHC-301 ac-
curately monitors the relative heating of the motor and
automatically duty cycles the unit at a safe level when a
process becomes unstable, or if a control loop is not
properly set. While the thermal switch in the motor pro-
tects the motor from overheating, thermal switches can
shutdown the actuator for ten minutes or more. Further,
typical thermal switches do not activate until temperatures
inside the actuator become too high for other components
in the actuator.
The Duty Cycle Control feature allows continu-
ous operation of the motor until it detects an excess heat
build up in the motor (usually well below the limit of the
thermal switch). At that time, duty cycle operation is au-
tomatically enabled and continues until the motor cools
enough to resume continuous operation. The duty cycle
period is approximately 2 seconds with an on time that
automatically varies depending on the heating of the mo-
tor. While this operation slows down the actuator's opera-
tion, it does not impact the resolution performance of the
DHC-301, and it prevents disruption of a process due to a
thermal switch shutdown.
SPECIFICATIONS
POWER REQUIREMENTS
117VAC 10%, 50/60 Hz
12 VA typical
Fuse Type: 0.5A TR5 Time Delay (replaceable)
COMMAND SIGNAL INPUT
Input Impedance
20K ohms (VOLTAGE CMD (+) Input)
251 ohms 1% (4-20 mA CMD (+) Input)
Loss of Command threshold
< 0.75V (1-5 VDC input)
< 1.5V (2-10 VDC input)
< 3mA (4-20mA input)
Command Out of Range threshold
> 5.25V (0-5 VDC, 1-5 VDC input)
> 10.5V (0-10 VDC, 2-10 VDC input)
> 21mA (4-20mA input)
FEEDBACK SIGNAL INPUT
Input Voltage: 0 to 2.5 VDC
External Feedback Potentiometer: 1K ohm

DHC-301
PEAKTRONICS U.S. Patent 7,466,100 applies to this product 9
POWER SUPPLY OUTPUTS
+15V OUT (J2-8): 100mA maximum (not including option module)
+5V OUT (J2-7): 20mA maximum
NOTE: Do not connect these outputs to other power supplies.
CONTROL OUTPUTS
Output Voltage (J1-1/J1-2 to J6-1): 5.1VDC maximum, 4.0VDC minimum
Output Current: 20mA maximum
ENVIRONMENTAL
Operating Temperature Range: 0 C to 60 C
Storage Temperature Range: -40 C to 85 C
Relative Humidity Range: 0 to 90 % (noncondensing)
OPTION MODULES
Various option modules can be plugged into the
DHC-301 option module connector, J3. Option modules
provide additional features such as position feedback sig-
nals, auxiliary switch outputs, or digital communications.
Contact the factory for the latest available modules. Refer
to the diagram below for instructions on installing an op-
tion module.
Plug option module into J3,
lock module in front panel
slots, and retighten front
panel screws.
DHC Series
Option
Module
J3
Loosen front panel screws and lift front panel up to
allow option module to plug in underneath.
Installing an Option Module

DHC-301
10 U.S. Patent 7,466,100 applies to this product PEAKTRONICS
WIRING DIAGRAMS
Input Signal Configurations
4-20mA Input using a self powered transmitter
DHC-301
4-20mA
Sourcing
or
Sinking
output
J2-5
4-20mA
SIGNAL GND
J2-4
135 ohm Slide Wire
using the 4-20mA Input Signal
DHC-301
XMA-108
135 ohm
Slide
Wire
4-20mA
Transmitter
OPEN
+15V OUT
J2-8
4-20mA
J2-5
Voltage Input using digital-to-analog card
DHC-301
VOLTAGE CMD (+)
J2-6
SIGNAL GND
J2-4
0-5V
1-5V
0-10V
or
2-10V
DAC
Remote Command Pot
using the 4-20mA Input Signal
DHC-301
MLT-100A
XMA-104A
Command
Pot
4-20mA
Transmitter
(includes dial and knob)
CW
RED
WHT
BLK
+15V
OUT
J2-8
4-20mA
J2-5

DHC-301
PEAKTRONICS U.S. Patent 7,466,100 applies to this product 11
WIRING DIAGRAMS
Output Configurations
Connecting a solid state relay block
J1-1
DHC-301
L3
L2
L1
3-PHASE
MOTOR
SSD-100
XFR-100
440VAC
380VAC
230VAC
115VAC
3
2
1
M2
M1
L2
L1
J1-2
J6-1
J2-1
J2-2
J2-3 COMMON
CLOSE
OPEN
CONTROL 2
OUT
CONTROL 1
OUT
OPEN
LIMIT OPEN TORQUE
CLOSE
TORQUE
CLOSE
LIMIT
NOTE: When the DHC-301 is in the manual
mode, the button operates Control 1 Out, and
the button operates Control 2 Out.
E
Connecting a position feedback transmitter
OTR-100
OTX-100
DHC-301
OTR-100 only
7 Voltage Output
4 AUX Close Output
3 AUX Open Output
2 Fault Output
6 mA Output
5 GND
1 Common
(Option Module)
J3
mA Feedback Monitor
Voltage Feedback Monitor
NOTE: The Fault Output contact will
open when power is lost or when a
fault condition exists.

DHC-301
www.peaktronics.com
PEAKTRONICS, Inc. 1363 Anderson Clawson, MI 48017 Phone [phone] FAX [phone]-208A
WIRING DIAGRAMS
Special Applications
Connecting an auto/manual station
J7-1
AMM-100
J7-2
1
DHC
Series
OFF (optional)
AUTO
MANUAL
STOP
(optional)
STOP
(optional)
CLOSE
OPEN
SC L
Connect for latching function.
Note, one STOP switch will
be required.
O
AMM-100
J7-2
J7-1
1SCOL
OFF
OFF (optional)
AUTO
MANUAL
OPEN
CLOSE
MECHANICAL
MANUAL OVERRIDE
SWITCH
(optional)
MECHANICAL
MANUAL OVERRIDE
SWITCH
(optional)
DHC
Series
USING
MOMENTARY
SWITCHES
USING
TOGGLE
SWITCHES
Connecting a mechanical manual override switch
DHC
Series
J7-2
J7-1
Mechanical
Manual Override
Switch Manual
Override
Normal
Operation