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POWR-UPS Model
2745-3 motor controls are full wave, full regenerative (four quadrant)
modules that control the speed and direction of motor torque for
shunt wound or permanent magnet DC motors. These exceptionally rugged
controls are available for either digital or analog isolated inputs,
and feature fully static (solid state) switching and thyristor phase
angle control, for applications of up to 3 horsepower.
These motor controls are available in open frame construction suitable
for OEM use in user provided enclosures. Power connections are made
with a heavy duty barrier block. A field removable barrier block
is provided for signal connections. Holes are provided for bottom
mounting.
Model 2745-3 controls operate from either 115 VAC or 230 VAC lines
at 50 Hz or 60 Hz. Power line fuses are incorporated on the bottom
of the board. These controls operate in conjunction with an auxiliary
transformer to drive motors with an armature rating of 24, 48, 90,
130 and 180 VDC. A field voltage supply producing either 50, 100
or 200 VDC is also incorporated for shunt field motors.
OPTIONS
Model p/n 2745-06
plug-in adjustable accel/decel board permits control of clockwise
and counterclockwise acceleration and deceleration with four independent
adjustments.
Model 2745-3 COVER (perforated metal cover).
DIGITAL INPUT: Model 2745D-3
for applications up to 3 horsepower
These controls are easily interfaced to either microprocessors or
10-bit parallel TTL logic level sources. Motor speed and direction
are determined by the value of a 10-bit parallel input: one bit
for direction and 9 bits for motor speed. Unused bits in lower resolution
applications may be tied off. Logic input signals are isolated from
the motor and power line with a minimum isolation voltage of 1500
VDC, reducing the possibility of grounding, noise or safety problems.
In addition, a failsafe circuit de-energizes the motor if the input
control power is not present. Use Model 2745D or 2745DL for applications
under 1 HP (see separate data sheet). Diagnostic LEDs for user interface
and setup.
ANALOG INPUT: Model 2745A-3
for applications up to 3 horsepower
These controls are easily interfaced to low level analog circuitry.
Motor speed and direction are determined by amplitude and polarity
(5 volts full scale) of input signal. Input signals are isolated
from the motor and power line with a minimum isolation voltage of
1500 VDC. This reduces the possibility of grounding, noise or safety
problems. In addition, a failsafe circuit de-energizes the motor
if the input control power is not present. Use Model 2745D or 2745DL
for applications under 1 HP (see separate data sheet). Programmable
jumper used for ±10 Volt analog input applications.
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