ES2700 DC Drive

HP	INPUT VOLTS AC	ARM VOLTS DC	FIELD VOLTS DC	100% DC ARMATURE CURRENT	PART NUMBER
1/4 - 1	120	90	100	17	2700-8000
1 1/2 - 2	120	90	100	28	2700-8001
1/2 - 1 1/2	240	180	200	17	2700-8000
3 - 5	240	180	200	35	2700-8001

High Performance in 2 Models Programmable for:

Input Voltage and Frequency
Tach or Armature Voltage Feedback
Torque or Speed Regulation
Horsepower (Maximum Current)

GENERAL DESCRIPTION

The ES2700 DC Drive is a high performance, non-regenerative DC motor control. Included are many standard features that are available only as options on many other single-phase non-regenerative drives. Accessibility to all important internal regulator points is provided by terminals on the control. This permits the ES2700 to be used in custom engineered applications, as well as in standard speed regulated applications. The ES2700 DC Drive was designed to control a DC motor's speed or torque by varying the DC voltage applied to the motor's armature.

Single phase AC input is converted to variable voltage DC output power by the ES2700 DC Drive. The DC output voltage varies as a function of an input reference voltage in speed regulated applications. Changing the speed reference results in a motor speed change. The DC output current varies as a function of an input reference voltage in torque regulated applications. Changing the torque reference changes the current supplied to the motor and results in a change in motor torque output.

The ES2700 DC Drive is a versatile control. Simple jumpered programming allows the ES2700 DC Drive to operate from either 120 or 240VAC input power at 50 or 60 Hz. Additional jumpers program the control to operate as either a speed regulator with armature voltage or DC tachometer feedback or as a torque regulator with armature current feedback.

Two control models handle the entire 1/4 to 5HP range of application. Calibration of drive current limit and inverse time overload protective circuits for rating within this range is by means of a jumper change in the main printed circuit board.

Included in the ES2700 DC Drive control are many built-in features not available on competitive units. Field economy and separately adjustable rates of acceleration and deceleration are included as standard. If desired, the built-in Accel/Decel control ramps can be bypassed completely without any change to the control, and current compounding can be added to the speed regulation by changing the position of a jumper. Current limit is normally set by a potentiometer located on the he main printed circuit board, but if desired, it can be adjusted using a remote mounted potentiometer or customer supplied voltage signal. The ES2700 also includes an ammeter output for use with one of the ES2700 DC Drive ammeter kits. No additional ammeter shunt is required.

On occasion, customer requirements may dictate that the operator's devices be mounted on the door of the enclosure.

STANDARD FEATURES

Circuit Board Indicators - Light emitting diodes (LEDs) of the main circuit board indicate: DC overload, Field Loss, Instantaneous Over-current Trip, Run Mode, Jog Mode, SCR's Being Gated.
Solid State Full Wave Power Bridge - Uses generously rated power semiconductors for maximum reliability and long life.
Isolated Control Circuitry - Provides complete isolation of the control and regulator circuitry from the AC power bus for protection in the event of a ground fault. The ammeter, speed potentiometer, and tachometer are not at line potential. Complete system capability is also possible without additional isolation accessories.
Power Supplies - Each ES 2700 contains and internal 115 VAC power supply to power the DC loop contractor and drive logic relays. Internal ±24 VDC, ±15 VDC and a regulated ±10 VDC power supply are also included.
Ammeter Output - Motor current can be indicated with the simple addition of a remote meter.
Field Economy - Insures longer life for wound field DC motors. May be easily bypassed or time delayed to meet specific application requirements.
Remote Current Limit - Available by the simple addition of a potentiometer or DC voltage input.
Negative IR Compensation- Available by jumper connection. Allows use of control in jumper applications.
Current (Torque) Regulator - 1% accuracy armature current regulator allows the operator to control motor torque instead of speed.
Speed Regulator - 2% accuracy using armature voltage feedback with IR compensation or 1% accuracy with tachometer feedback. Regulation may be improved by selecting the proper motor mounted tachometer.
Separately Adjustable Linear Accel/Decel Control - Two ranges: 0.2 - 4 seconds or 2 - 30 seconds.
Inner Current Loop Regulator - Inherent high band width capability for fast response.
AC Line Filter and Transient Voltage Suppression Network - Eliminates interaction between other drives or AC equipment.
SCR Trigger Circuits - Pulse transformer isolated, hard firing, high frequency "burst" type pulse train output from individually grated oscillators insures SCR conduction regardless of the effects of the notching or incoming AC power line.
Standard Adjustments - Maximum speed, minimum speed, acceleration time, deceleration time, IR compensation, current limit, jog speed, velocity stability, speed rate and current stability.
Jog at Preset Speed - Separately adjustable from zero to plus or minus 50% of base speed.
Exclusive Static Adjustable Current Limit - Allows static setting of the desired current limit value without applying DC power and without a connected output load whenever the optional test meter in connected.
Common Control Circuit Boards - All ES 2700 series controls utilize the same PC board regardless of HP, voltage, frequency, or control mode.
Instantaneous Over-current Protection - Senses armature fault current quickly to protect both semiconductors and motors against damaging current levels.

OPTIONS

Test Meter - this modification consists of a digital panel meter and multi-position selector switch. It provides the capability to monitor nine critical drive parameters. The test meter kit easily connects.
Ammeter Kit - the ES2700 DC control includes circuitry to drive an external ammeter without the addition of an ammeter shunt. This external meter can be calibrated in either percent load or in amperes.
Speed Potentiometers - kits includes a high quality industrial grade pot, adjustment knob and associated mounting hardware.

SPECIFICATIONS

Operating Conditions:

Rated Line Voltage: 120 or 240 VAC AC Single Phase
Line Voltage Variations: ±10%
Rated Line Frequency: 50/60Hz (±2Hz)
Ambient Temperature: 0-40o C (32o F to 140o F)

Environmental Conditions:
Altitude: Sea Level to 3300 Feet
Ambient Temperature: (Enclosed Control) 0oC to 40oC
Ambient Temperature: (Chassis Mount Control) 0oC to 55oC
Storage Temperature: -30oC to 65oC
Relative Humidity: 0 to 95%

*Operation at elevated temperature and higher altitudes requires derating of the control

Adjustments:
Min Speed: 0-30% of rated speed
Acceleration Time: 0.2 to 4 sec. or 2-30 sec. linear
Deceleration Time: 0.2 to 4 sec. or 2-30 sec. linear
Jog Speed: 1 to 50% rated speed
IR Compensation: 0 to 15% rated voltage
I Limit: 0 to 150% of selected range
Max Speed: 70-130% of rated speed

Performance:
Control Speed Range: 20:1 for basic control. May be extended to 200:1 by modification.
Speed Regulations: 1% of maximum speed with any DC tachometer;
For a 95% load change:
All Other Variables:
Overload Capacity: 150% of rated current for 1 minute
Service Factor: 1.0

Field Data:
Voltage: 100VDC with 120 VAC input200VDC with 240VAC input
Current: 3 amperes max.

MOUNTING DIMENSIONS FOR CHASSIS ES2700 DC Drive