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 models.
• Fuses for short circuit protection on chassis-mount controllers (optional).
• 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 high performance.
• 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 wiring room.
• 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 HP.
• Adjustable current limit (10-150% of full load).
• IR (load) compensation adjustable to suit individual motor characteristics.
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 equipment.
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.
•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.
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.
normal operation, the motor will coast-to-rest.
The dual-function plug-in card provides the PACEMASTER drive with both the tech feedback and tech follower (non- isolated) functions.
another motor or rotating machinery permitting the drive to follow at an adjustable ratio.
*Line driver output to provide a speed signal to a follower drive also equipped with this option.
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 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 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.
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.
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.
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.
PACEMASTER drive. Separate adjustment potentiometers for accel and decel are supplied on the option card.
Same as above except a terminal strip is provided for connecting external adjustment potentiometers. Potentiometers are not included.
command to enter the drive. Anti-plug protection is also provided with this option.
Contactor option (MO-02576 or M0-02587 for PACEMASTER 1, or MO-02866 for PACEMASTER 2) for proper operation.
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.
function at a speed other than controller speed. This jog action is momentary, causing motor rotation when the RUN switch is depressed.
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.
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.