Pacemaster 1 & 2 DC Drive
Pacemaster 2 has been Discontinued by the manufacturer
Adjustable-speed Pacemaster DC Drives are robust, rugged and reliable. Pacemaster 1 is available in 1/4 to 2 HP ratings and operates from single phase 115 or 230 volts AC. Pacemaster 2 is available in 3 to 5 HP ratings and operates from single phase 230 VAC. Each drive solution provides linear performance and EMI noise immunity. Both drives are UL Listed and CSA Certified.
• Choice of open chassis or NEMA 4 enclosure.
• Circuit breaker for short circuit protection on NEMA 4 enclosed
• Fuses for short circuit protection on chassis-mount controllers
• Pacemaster 1 is re-connectable for 115 or 230 VAC input.
• Operates on 50 or 60 Hz. for worldwide applications.
• Conservatively rated components selected for long service life.
• Full-wave power conversion for smooth efficient operation and
• Voltage transient protection provided by metal oxide suppressor (MOV) placed across the AC line to minimize the effect of high voltage spikes from the ac power source.
• Power cube contains ail power semiconductors for increased
reliability and minimal maintenance time.
• Control transformer-24 volt secondary isolates all magnetic
control and logic from the AC power source for operator protection.
• Relay in control circuit protects against automatic restarting
after an AC power interruption and improves drive reliability.
• Simple, easy installation with minimum connections and ample
• Jog, by selector switch, to allow momentary motor rotation when
RUN switch is depressed.
• Operator controls can be mounted either in drive controller or
at a remote location.
• Maximum and minimum speed adjustments.
• Adjustable "horsepower"-from 1/4 to 2 HP and 3 to 5
• Adjustable current limit (10-150% of full load).
• IR (load) compensation adjustable to suit individual motor
• UL Listed and CSA Certified.
The Pacemaster Adjustable Speed Drives convert AC line power to
regulated direct current for adjustable speed armature control of
shunt-wound or permanent-magnet DC motors. The Pacemaster 1 drive is
available in ratings from 1/4 to 2 HP and operates from single phase 115 or
230 volts AC. The Pacemaster 2 drive is available from 3 to 5 HP for 230
volts AC operation.
The Pacemaster Controllers are UL Listed and CSA Certified. All
controllers are manufactured to comply with applicable standards established
by National Electrical Code and NEMA for industrial motor and control
Unique design features of the Pacemaster models and an extensive
selection of standard pre-engineered modification option kits make the
Pacemaster Controller a flexible unit for a wide range of industrial
applications. The modification option kits can be ordered factory installed
or they can be easily added in the field.
The Pacemaster Controllers are available in a chassis-mount or NEMA
4 enclosed high voltage spikes from the AC power source.
• ARMATURE CONTACTOR provides positive disconnect of the motor
armature from the rectified power source.
• ARMATURE CONTACTOR with dynamic braking for quick motor stops.
• REVERSING CONTACTORS for change of motor rotation.
• REVERSING WITH DYNAMIC BRAKING provides fast changes of
direction of motor rotation.
• MOTOR SPEED POTENTIOMETER-choice of one-turn or ten-turn for
motor speed adjustments.
• OPTION PLUG-IN CARDS-either single or dual features are
available on each card:
•TACHOMETER FEEDBACK-Allows true speed regulation in response to tachometer feedback signal.
•VOLTAGE FOLLOWER-Allows drive to follow an external tachometer or voltage signal. Available in non-isolated and isolated versions.
• TORQUE TAPER-Allows for changing speed/torque relationship for simple winder applications.
• LINEAR ACCEL AND DECEL-Separate adjustments of acceleration and deceleration times.
• PROCESS FOLLOWER-For applications where drive speed is controlled by a process controller.
• PLC/PUSHBUTTON REVERSING-For reversing applications where a PLC, Reversing Relays or Pushbutton Operators are used.
• JOG AT INDEPENDENT SPEED-Provides a separate speed adjustment for use in a momentary jog mode.
• SPEED INDICATORS-See Data Sheet PSAC.
• ISOLATION TRANSFORMERS-See Data Sheet PSTR.
• DC MOTORS-See Data Sheet PSM1.
|CATALOG NO.||DESCRIPTION OF FUNCTION||
|DESCRIPTION OF FUNCTION|
A two-pole DC magnetic contactor provides
positive disconnect of the motor armature
from the rectified power source for added
|MO-03045||DC TACHOMETER (VOLTAGE)
This option allows the speed of the PACEMASTER to be controlled automatically by a speed reference voltage from a DC tachometer generator. This enables the speed of one motor to follow the speed of a master motor or machine. This option will accept a DC input signal of 10-275 volts at maximum motor speed.
WITH DYNAMIC BRAKING (DB)
Reduces the stopping time of the motor
when the STOP button is depressed. Under
normal operation, the motor will coast-to-rest.
If a dynamic braking kit has been added, when the STOP button is depressed the motor functions as a generator, and the rotating mechanical energy is turned into
electrical energy which is dissipated as heat in the dynamic braking resistor. Dynamic braking is not a holding brake, and will not keep a motor at rest from rotating. The kit consists of a contactor and dynamic braking resistor.
|MO-03047||DC TACHOMETER FEEDBACK
& DC TACHOMETER (VOLTAGE) FOLLOWER
The dual-function plug-in card provides the PACEMASTER drive with both the tech feedback and tech follower (non- isolated) functions.
|MO-02575||ARMATURE CONTACTOR WITH DYNAMIC BRAKING
& ANTI-PLUG RELAY
The kit consists of a contactor, dynamic braking resistor and an anti-plug relay. The anti-plug relay inhibits restarting the
controller until the braking cycle is complete, thereby avoiding a potentially damaging electrical surge and mechanical stress.
|MO-03508||PULSE TACHOMETER FEEDBACK
& PULSE TACHOMETER FOLLOWER
This option allows the use of a magnetic pulse pick-up on the
motor for accurate speed control and accepts a pulse input from
another motor or rotating machinery permitting the drive to follow at an adjustable ratio.
|MO-02867||DYNAMIC BRAKING RESISTOR
This option provides dynamic braking for the PACEMASTER 2. The kit must be used with the armature contactor (MO02865) or
reversing contactors (MO-02866).
|MO-08437|| DIGITAL PULSE TACHOMETER FEEDBACK
& DIGITAL PULSE TACHOMETER FOLLOWER
This option provides the following functions to the PACEMASTER drive:
* Digital Pulse Tachometer Feedback from CMC Model 70
*Digital Pulse Tachometer Follower from CMC Model 70 Tachometer
*Line driver output to provide a speed signal to a follower drive also equipped with this option.
*Line driver output for digital speed display
*Isolated Digital speed reference input
This option is ideal for applications that require one drive (slave) to closely follow (±¼) the speed of another drive (master) either at the same speed or at a constant ratio.
This option inhibits restarting the PACEMASTER 2 Controller until the braking cycle is complete. The kit must be used with contactor option MO-02865 or MO-02866.
|ISOLATED DC TACHOMETER (VOLTAGE) FOLLOWER
This option is functionally the same as the non-isolated tachometer follower. The difference is that a control isolation transformer is supplied with the plug-in card, to isolate the incoming reference voltage from the controller. The option will accept a DC input signal of 5-275 volts at maximum motor speed.
This option consists of two 2-pole contactors and provides full armature reversing.
|ISOLATED DC TACHOMETER (VOLTAGE)
FOLLOWER & DC TACHOMETER FEEDBACK
This option is a dual-function printed circuit board which is inserted into the PACEMASTER control assembly PC board. The option board can be used to function as a tachometer feedback and as an isolated tachometer follower. The option will accept an input signal from a DC tachometer generator with an output voltage range of 10- 275 volts at maximum motor speed for feedback.
This option is not available for reversing applications.
|MO-02587||REVERSING WITH DYNAMIC BRAKING
This option kit offers a convenient method to change the direction of motor rotation. By adding this kit, the operator can select the direction of rotation by depressing the FOR or REV selector switch The kit consists of FORWARD and REVERSE contactors and dynamic braking resistor.
|MO-03319||ISOLATED DC TACHOMETER (VOLTAGE)
FOLLOWER & PULSE TACHOMETER FEEDBACK
This option is a dual-function printed circuit board which is inserted into the PACEMASTER control assembly PC board. The option board can be used to provide magnetic pulse pick-up feedback and isolated tachometer follower functions. The option card will accept a DC input signal of 5-260 volts at maximum motor speed for the follower function.
|MO-02577||REVERSING WITH DYNAMIC BRAKING &
This option consists of FORWARD and REVERSE contactors, dynamic braking resistor and an anti-plug relay.
|MO-02538||PROCESS FOLLOWER (NON-ISOLATED)
This option enables the PACEMASTER to automatically follow a milliampere signal from a process controller. Typical applications are those where motor speed must be controlled as a function of a process variable such as temperature, pressure, weight, fluid flow, etc. The kit consists of a small PC card which plugs into the PACEMASTER control assembly PC card. The card will accept a 0-5,1-5,0-20,4-20,0-50, or 10-50 mA ungrounded input signal.
|SOLID STATE DYNAMIC BRAKING
This option provides the PACEMASTER 1Controller a means of dynamic braking of the motor without the use of an armature contactor. The dynamic braking function allows the motor to act as a generator; the rotating mechanical (kinetic) energy is converted into electrical energy that is
dissipated in the form of heat by the dynamic braking resistor. Not available for reversing applications.
|ISOLATED PROCESS FOLLOWER
This option enables the PACEMASTER to follow a low level
current signal, typically obtainable from a monitoring device or flow transducer. The standard input ranges are 0-5, 1- 5, 0-20, 4-20, 0- 50 and 10-50 mA. Isolation is provided between the input signal and the controller. Also, use of an external switch with this option will provide for either AUTOMATIC (Follower) or MANUAL (Speed Pot.) modes of operation.
|MO-02569||DC TACHOMETER FEEDBACK
This option card interfaces between a tachometer generator and the PACEMASTER Controller. The option will accept an input signal from a DC
tachometer generator with an output voltage range of 12-275 volts at maximum motor speed. The tachometer signal replaces the IR compensation circuitry in the controller making the unit directly sensitive to motor speed for improved speed regulation. This results in expanded speed range, improved speed regulation with load changes and reduced sensitivity to operating conditions
such as line voltage variations, ambient temperature changes, motor field heating and other operating variables.
& PULSE TACHOMETER FEEDBACK
This dual function plug-in option allows linear accel/decel and pulse tachometer feedback features to be used with the
PACEMASTER drive. Separate adjustment potentiometers for accel and decel are supplied on the option card.
|MO-03309||PULSE TACHOMETER FEEDBACK
This option card interfaces between a magnetic pulse pickup and the PACEMASTER Controller to provide speed feedback. The card will accept input from a 60 pulse per revolution magnetic pulse tachometer. Speed Regulation is defined as 1% of motor base speed over a 25:1 speed range.
||Same as above except a terminal strip is provided for connecting external adjustment potentiometers. Potentiometers are not included.|
|ISOLATED PROCESS FOLLOWER
& DC TACHOMETER FEEDBACK
This option provides the same function as the Isolated Process Follower, and additionally provides for use of tachometer generator feedback to regulate motor speed. The option will accept an input signal from a DC tachometer generator with an output voltage range of 10-275 volts at maximum motor speed for feedback. This option is not available for reversing applications.
|MO-04275||PLC/PUSHBUTTON REVERSING WITH ANTI-PLUG
This option provides the additional logic required to permit the
PACEMASTER Controller to be used with a Programmable Logic Controller, Reversing Relays, or Pushbutton Operators for reversing applications. The option provides the necessary
interlocking so that a Forward and a Reverse command cannot
enter the drive simultaneously. The first command to enter the
drive will take priority until it is removed thus allowing a new
command to enter the drive. Anti-plug protection is also provided with this option.
This option requires the addition of the appropriate Reversing
Contactor option (MO-02576 or M0-02587 for PACEMASTER 1, or MO-02866 for PACEMASTER 2) for proper operation.
|MO-03318||ISOLATED PROCESS FOLLOWER
& PULSE TACHOMETER FEEDBACK
This option provides the same function as the Isolated Process Follower, and
additionally provides for use of magnetic pulse pick-up feedback to regulate motor speed.
|MO-06327||PLC/PUSHBUTTON REVERSING WITH
ANTI-PLUG & DC TACHOMETER FEEDBACK
This dual-function option provides the control logic as described above and tachometer feedback features to be used with the PACEMASTER drive. The option will accept an input signal from a DC tachometer generator with an output voltage range of 12-275 volts at maximum motor speed.
|TORQUE TAPER KIT
This option is designed for simple center-driven winders which require nearly constant tension. This requires the motor current (torque) limit to increase as the motor speed decreases. This option allows fine adjustment of the slope and break point of speed-torque curve.
|MO-02774||JOG AT INDEPENDENT SPEED
This option provides the PACEMASTER Controller with a jog
function at a speed other than controller speed. This jog action is momentary, causing motor rotation when the RUN switch is depressed.
|MO-02537||LINEAR ACCEL/DECEL & DC
TACHOMETER FEEDBACK This dual-function option allows linear accel/decel and tachometer feedback features to be used with the PACEMASTER drive. The option will accept an input signal from a DC tachometer generator with an output voltage range of 12-275 volts at maximum motor speed.
|MO-02775||JOG AT INDEPENDENT SPEED
& DC TACHOMETER FEEDBACK
This dual function option card provides both independent jog
speed and tachometer feedback functions. The option will accept an input signal from a DC tachometer generator with an output voltage range of 12-275 volts at maximum motor speed.
This option permits potentiometer adjustment of the solid-state timing circuits to establish a desired time span to attain a preset speed. Acceleration and deceleration rates are independently adjustable from 2 to 20 seconds. The adjustments are made by potentiometers located on the option card.
Also, external acceleration and deceleration time adjustment can be made by external potentiometers.
|MO-02585||HIGH VOLTAGE FIELD SUPPLY, FULL WAVE KIT
This option provides a full-wave field excitation for shunt-wound DC motors with high voltage fields. The kit supplies 100VDC for 115VAC controllers and 200VDC for 230VAC controllers.
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Microcon Technologies Inc.
1105 Crestlawn Drive, Unit # D8 & D9
Mississauga, Ontario L4W 1A7 Canada
Tel: (905) 602-4770
Fax: (905) 602-4779