Introduction; Control Features; 125D Series Heatsink Dimensions - DART Controls 125D Manuel D'instructions

• The 123D variable speed control is available in a range of 150mA through 5.5 ADC (or up to 10 ADC if using a
suitable external heatsink) at 24 through 36 VAC input.
• The 125D variable speed control is available in a range of 150mA through 1/4 H.P. at 120/240 VAC input.
• The 125DV variable speed control is available in a range of 1/8 through 1 H.P. at 120/240 VAC input. With
-HS(125D) or suitable external heatsink (where 125D extrusion temperature does not exceed 70° C.), maximum
U.L. rating can be increased to 2 H.P. and 10 Amps DC.
• The control is designed for DC Permanent Magnet, Shunt Wound, and some Universal (AC/DC) motors in the
above horsepower ranges.
• Incoming AC voltage is converted to adjustable full wave rectified DC voltage to operate the DC motor. Also, a
full wave field voltage is provided for shunt wound motors (see page 4 for voltages).
• The control incorporates transient voltage protection with adjustable current limit which fits into a compact
package. It features adjustable minimum and maximum speeds along with adjustable IR compensation and an
inhibit function.
• Options are available to change ACCEL/DECEL time (see page 8, -15 / -K options).
• cULus Recognized under, U.L. File # E78180.
MINIMUM SPEED - Allows adjustment of the motor speed when the speedpot is set at minimum (CCW). This permits the user
to eliminate "Deadband" on the main speed control, permitting zero calibration. Clockwise rotation of "MIN" trimpot increases
speed.
MAX SPEED (Maximum Speed) - Allows adjustment of the motor speed when the speedpot is set at maximum (CW). This
permits the user to eliminate the top end "Deadband", which will provide full speed at maximum rotation. Rotation of the "MAX"
trimpot in the clockwise direction increases the maximum motor speed.
IR COMP (Speed Regulation) - This allows for adjustment of the circuitry that controls the speed regulation of the motor. The
circuitry controls armature speed by changing the armature voltage to compensate for increased or decreased motor loading.
Clockwise rotation of the "IR COMP" trimpot will increase compensation.
CUR. LIM. (Current Limit) - Provides protection from excessive armature current by limiting the maximum armature current
the control can provide. This enables adjustment of the maximum torque the motor can deliver. Torque adjustment (Cur. Lim.) is
preset at 125% of rated motor torque (current) based on horsepower. Clockwise rotation of the "CUR. LIM." trimpot increases the
torque (current) the control will provide.
INHIBIT TERMINAL PIN - Allows the user a choice of stopping and starting hard (fast) or stopping hard with a soft start through
an adjustable acceleration ramp, without breaking the AC lines (see page 6).
TERMINAL STRIP - Allows for connection of AC lines, motor leads, motor field (if needed), and speed potentiometer

125D SERIES HEATSINK DIMENSIONS

AUXILIARY HEATSINK -HS(125D)
.6875
5.625
.6875
1.375

INTRODUCTION

CONTROL FEATURES

.218
5.625
6.250
STANDARD HEATSINK
MIN
.188" DIA.
(6 SLOTS)
MAX
IR COMP
11/32"
SLOT
CUR LIM
DEPTH
.249"
2
4.250"
P1
-8
P2
ADDER BOARD
-7
CONNECTOR
-6
-5
-4
P3
-3
INHIBIT
PIN
-2
-1
3.750"
.694"
1.750"
3.625"
1.300"
.380"