DART Controls 250G Series User manual

250G CONTROL SERIES
LT67 (0220)
5000 W. 106th Street
Zionsville, Indiana 46077
Phone [phone]
Fax [phone]
www.dartcontrols.com
Instruction Manual
Variable Speed DC Control
CONTROLS
A-5-3263N

1
WARRANTY
Dart Controls, Inc. (DCI) warrants its products to be free from defects in material and workmanship. The exclusive remedy for
this warranty is DCI factory replacement of any part or parts of such product which shall within 12 months after delivery to the
purchaser be returned to DCI factory with all transportation charges prepaid and which DCI determines to its satisfaction to be
defective. This warranty shall not extend to defects in assembly by other than DCI or to any article which has been repaired or
altered by other than DCI or to any article which DCI determines has been subjected to improper use. DCI assumes no respon-
sibility for the design characteristics of any unit or its operation in any circuit or assembly. This warranty is in lieu of all other
warranties, express or implied; all other liabilities or obligations on the part of DCI, including consequential damages, are hereby
expressly excluded.
NOTE: Carefully check the control for shipping damage. Report any damage to the carrier immediately. Do not attempt to operate
the drive if visible damage is evident to either the circuit or to the electronic components.
All information contained in this manual is intended to be correct, however information and data in this manual are subject to
change without notice. DCI makes no warranty of any kind with regard to this information or data. Further, DCI is not responsible
for any omissions or errors or consequential damage caused by the user of the product. DCI reserves the right to make manu-
facturing changes which may not be included in this manual.
WARNING
Improper installation or operation of this control may cause injury to personnel or control failure. The control must be
installed in accordance with local, state, and national safety codes. Make certain that the power supply is disconnected
before attempting to service or remove any components!!! If the power disconnect point is out of sight, lock it in
disconnected position and tag to prevent unexpected application of power. Only a qualified electrician or service
personnel should perform any electrical troubleshooting or maintenance.At no time should circuit continuity be checked
by shorting terminals with a screwdriver or other metal device.
WARRANTY ............................................................................................................................................................................... 1
INTRODUCTION ........................................................................................................................................................................ 2
CONTROL FEATURES .............................................................................................................................................................. 2
HEATSINK DIMENSIONS .......................................................................................................................................................... 2
SPEEDPOT KIT ASSEMBLY ..................................................................................................................................................... 3
MOUNTING PROCEDURE ........................................................................................................................................................ 3
MODEL SELECTION ................................................................................................................................................................. 3
WIRING PROCEDURE & FUSING ............................................................................................................................................ 4
TERMINAL STRIP WIRING ....................................................................................................................................................... 4
CHASSIS & ENCLOSED MODEL HOOK-UP DIAGRAMS .................................................................................................... 5-6
START-UP PROCEDURE & ADJUSTMENTS ........................................................................................................................... 6
TRIMPOT ADJUSTMENT PROCEDURE .................................................................................................................................. 7
TRIMPOT SETTING CHART ..................................................................................................................................................... 7
CONTROL MODIFICATIONS .................................................................................................................................................... 8
TWO SPEED OPERATION ............................................................................................................................................... 18
DYNAMIC BRAKING ........................................................................................................................................................ 18
TACH FEEDBACK & FOLLOWER ................................................................................................................................... 18
INHIBIT INSTRUCTIONS ................................................................................................................................................. 18
OPTION DESCRIPTION ........................................................................................................................................................9-13
-5 OPTION ..................................................................................................................................................................... 9-10
-7 OPTIONS ................................................................................................................................................................... 9-10
-11 / -17B / -29 / -29B / -34A OPTIONS ...................................................................................................................... 10-11
-55H2 / -56H2 CHASSIS OPTIONS & ADJUSTMENT PROCEDURE ............................................................................ 12
-56H2 ENCLOSED OPTION ............................................................................................................................................. 13
IN CASE OF DIFFICULTY ....................................................................................................................................................... 13
SPECIFICATIONS & TYPICAL MOTOR CURRENTS ............................................................................................................. 14
250G SERIES PARTS PLACEMENT & LIST .......................................................................................................................... 14
250G SERIES SCHEMATIC .................................................................................................................................................... 15
REPAIR PROCEDURE & PRODUCT LINE ........................................................................................................ BACK COVER
TABLE OF CONTENTS

2
INTRODUCTION
• The Dart 250G Series variable speed DC motor control is a versatile, general purpose control rated to 2 HP, available in
chassis mount or enclosed configurations; with options for specific applications.
• The 251G model is available with an adjustable HP range of 1/50 thru 1/8 at 120 VAC input.
• The 253G model has a dual voltage input (may accommodate either 120 or 240 VAC). It is available with an adjustable HP
range of 1/8 thru 1 HP for 120 VAC, and 1/4 thru 2 HP for 240 VAC input.
• Designed for DC Permanent Magnet, Shunt Wound, and some Universal (AC/DC) motors in the above horsepower ranges.
• IncomingACvoltageis also converted to adjustablefullwaverectifiedDCvoltage(viaapackagedbridge)tooperatetheDC
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 and an AC fuse for protection. It
features adjustable minimum and maximum speeds along with adjustable acceleration and IR Compensation. Tach feedback
is accomplished thru a connection to a pin (P2) on the printed circuit board.
• The 250G Series has a linear acceleration/deceleration ramp.
• The control also has a barrier type terminal strip for all power and control wiring.
• The enclosed model uses a gasketed cover assembly that is rated NEMA 4/12.
• cULus Listed.
HEATSINK DIMENSIONS
FOR CHASSIS VERSION: Allow 1.55" for height clearance, 7.00" for overall length.
FOR ENCLOSED VERSION: Allow 3.50" for height clearance, 7.40" for overall length.
MIN. SPEED (minimum speed) - Allows adjustment of the motor speed when the speedpot is set at minimum (CCW). This
permits the user to eliminate the “deadband” on the main speed control permitting zero calibration. Clockwise rotation of “MIN”
trimpot increases minimum motor speed.
MAX. SPEED (maximum speed) - provides for 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.
ACCEL (acceleration) - allows adjustment of the motor acceleration from a minimum of 0.5 seconds to approximately 8.0 sec-
onds. The deceleration time depends on the ACCEL setting. For DECEL time equal to ACCEL time, see -17B option.
IR COMP (speed regulation) - adjusts the control output to compensate for speed changes caused by varying motor loads. As
the motor load is increased, IR COMP increases the voltage output of the control. 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. Current limit adjustment (CUR LIM)
is set at 125% of the rated motor current (torque) based on horsepower. Clockwise rotation of the “CUR LIM” trimpot increases
the current (torque) the control will provide.
INHIBIT TERMINAL PIN (P2) - 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 8).
TERMINAL STRIP - allows for connection of AC lines, motor leads, motor field (if needed), and speed potentiometer.
CONTROL FEATURES
5.500
7.000
.750
5.125
7/32 SLOTS (4)
TYP. .350 DEEP
5.530

3
WARNING
1. Be sure the control housing is properly grounded.
2. Arm connections must not be switched or broken while the control is on. Serious damage may result.
3. For non-speedpot applications,the input connectionsto the Lo-Wiper-Hileads mustnotbegrounded.Serious
control damage may result from a grounded input.
SPEEDPOT KIT ASSEMBLY
MOUNTING PROCEDURE
CAUTION: Do not mount control where ambient temperature is outside the range of -10oC. (15oF.) to 45oC. (115oF.)
1. Four 7/32" diameter slots are provided for control mounting.
2. The chassis of the control can be used as a template.
3. Use standard hardware to mount.
4. The enclosed version has two threaded holes (1/2" NPT) provided on the bottom side endplate near the terminal strip to
facilitate wiring.
MODEL SELECTION
The 251G will operate a 90 VDC motor in the H.P. range of 1/50 through 1/8 H.P., using different trimpot settings. The 253G will
operate a 90 VDC motor in the H.P. range of 1/8 through 1 H.P., and a 180 VDC motor in the range of 1/4 through 2 H.P., using
different trimpot settings.
* Not available with 120 VAC input - Input voltage determines maximum allowable H.P.
INPUT OUTPUT OUTPUT CHASSIS ENCLOSED
HORSEPOWER VOLTAGE VOLTAGE AMPS DC MODEL MODEL
1/50
1/20 120 VAC 0-90 VDC 1.2A 251G-12C 251G-12E
1/8
1/8
1/4
1/3
1/2
3/4
1.0
1.5*
2.0*
120/240 VAC 0-90/0-180 VDC 10.8A 253G-200C 253G-200E
Note: The minimum current rating for all 250G controls is 150mA.
240 VAC 0-180 VDC 10.8A 253G-200C 253G-200E
SPEEDPOT
(5K 1/2W)
CUSTOMER'S
MOUNTING BRACKET
DIALPLATE
2.00" dia.
LOCK
WASHER
HEX NUT
SPEEDPOT
KNOB
SPEEDPOT LO (CCW) (ORANGE)
SPEEDPOT WIPER (RED)
SPEEDPOT HI (CW) (WHITE)
.437
3/8
DIA.
5/32
DIA.
SPEEDPOT LOCATOR HOLE DIMENSIONS
.250 Dia.
.500 .370 .370
1.240
1.250

4
P1-7 (-FIELD) DO NOT USE for permanent magnet motor. Connect minus (-) Field wire of SHUNT WOUND MOTOR.
P1-8 VERY IMPORTANT !!! Refer to “FUSING”, shown above.
P1-9 CHASSIS VERSION: (SPARE) Make no connection to P1-8 or P1-9
ENCLOSED VERSION: (AC) 120VAC - Connect incoming hot AC (black wire) to P1-9 and Neutral (white wire) to
P1-8. Connect ground (green wire) to Chassis Ground, as shown in
diagram - page 5.
240VAC - Connect both hot sides, one to P1-8 and one to P1-9. Also connect
ground wire to Chassis Ground.
P1-10 VERY IMPORTANT !!! Refer to “FUSING”, shown above.
P1-11 CHASSIS VERSION: (AC) 120VAC - Connect incoming hot AC (brown or black wire) to P1-11 and Neutral (white
or yellow wire) to P1-10. Connect ground (green wire) to Chassis Ground.
240VAC - Connect both hot sides, one to P1-10 and one to P1-11. Connect ground
wire to Chassis Ground.
ENCLOSED VERSION: (SWITCHEDAC) No connectionstoP1-10andP1-11.Thisisfor switchedACoutput.Note
“FACTORY WIRING” (page 5). Pilot lights can be connected between these
terminals. The voltage present at these terminals is AC input voltage.
FIELD VOLTAGE TABLE
VAC INPUT 120 240
VDC FIELD 100 200
}
}
P1-1 (SPEEDPOT LO) Connects to low side (orange wire) of the 5K speedpot (normally the CCW end). This input is raised
and lowered by the MIN. trimpot. Electronic speed input (voltage follower) may be referenced to speedpot LO if the MIN
trimpot adjustments are to be active. Otherwise, inputs may be referenced to -ARM, which will bypass the MIN trimpot.
NOTE: INPUT MUST NOT BE GROUNDED!!
P1-2 (SPEEDPOT WIPER) Connects to wiper (red wire) of the 5K speedpot (center lead). For voltage follower applications,
this INPUT MUST NOT BE GREATER THAN +12 VOLTS MAXIMUM AND MUST NOT BE GROUNDED!
P1-3 (SPEEDPOT HI) Connects to high side (white wire) of the 5K speedpot (CW end). This is internal +12 volts. For start-
stop applications, the connection between this terminal and speedpot HI can be opened and closed by a SPST switch.
NOTE: INPUT MUST NOT BE GROUNDED!!
P1-4 (-ARM) Connects to minus (-) Armature wire (A2) on motor. For voltage follower applications where the MIN trimpot is
bypassed, connect minus (-) of the follower to this terminal.
P1-5 (+ARM) Connects to plus (+) Armature wire (A1) on motor. 0-90 VDC for 120 VAC input OR 0-180 VDC for 240 VAC
input. See “SPECIFICATIONS” for output rating.
P1-6 (+FIELD) DO NOT USE for permanent magnet motor. This supplies +Field voltage for a SHUNT WOUND MOTOR.Refer
to Field Voltage table. For motors with dual voltage field (i.e. 50/100V or 100/200V), make sure highest value is connected.
WIRING PROCEDURE
1. Size all wires which carry armature or line current to handle currents as specified by national, state, and/or local codes. All
other wires may be #18 AWG or smaller as permitted by local code.
2. Separate control wires from all the Armature and AC line wires when routed in conduits or in wire trays. The enclosed
version has two threaded holes (1/2" NPT) in one endplate, located near the terminal strip, for this purpose.
The 250G Series has an 11 position terminal strip for ease of connection.
TERMINAL STRIP WIRING
FUSING
The 250G is provided with a fuse in AC line 1 (P1-11).This fuse is sized to open in the event of a shorted armature or if an arma-
ture line is shorted to earth ground. As long as 120 VAC input is connected properly, there is no additional fusing needed.
For 240 VAC applications, an external fuse may be used in AC line 2 (P1-10).This fuse should be a Bussman ABC10 or LittleFuse
314-010. This added fuse will provide protection on both AC legs to the 250G. If you desire not to fuse both legs, the fuse in the
control will open in the event of excessive armature currents.
Note: AC current is determined by motor characteristics. In some applications it may be necessary to increase fuse value.
120/240 VAC 0-90/0-180 VDC 10.8A 253G-200C 253G-200E
240 VAC 0-180 VDC 10.8A 253G-200C 253G-200E

INSIDE OF COVER
SPEEDPOT
DPST SWITCH
(black)
(black
or brown)
Endplate with holes for 1/2" NPT conduit
-11 -9-8-4 -5 -6 -7-1 -2 -3
P2
Inhibit
Pin
P1
Pot Lo
Wiper
Pot Hi
-Arm
+Arm
P1_6
P1_7
AC
AC
motor
armature ac input
field*
chassis
ground
Switched AC Switched AC
Min Max Accel
IR
Comp
Cur.
Lim. LO (orange)
HI (white)
WIPER (red)
(white)
(white
or yellow)
-10
5
250G SERIES ENCLOSED HOOK-UP DIAGRAM
250G SERIES CHASSIS HOOK-UP DIAGRAM
In the 250G enclosure kit (250GCK) you will find 2 endplates,
a cover assembly (containing speedpot, DPST switch, gasket
and wiring), and 8 screws.Install both endplates using (4) #5
screws, and the cover assembly, using (4) #6 screws.Before
screwing down cover assembly, route wiring through conduit
holes in endplate by terminal strip.
* Used for shunt wound motors only! No connection is made to
these terminals when using permanent magnet motors.
* Used for shunt wound motors only! No connection is made to these terminals when using permanent magnet motors.
AC AC
-11
-5
motor
armature
ac input
-8
-9-8 -10
field*
chassis
ground
-4 -5 -6 -7
orange white
red
-1 -2 -3
Customer Installed
Speedpot
(factory provides 8"
leads)
P2
Inhibit
Pin
Min Max Accel
IR
Comp
Cur.
Lim.
P1
Pot Lo
Wiper
Pot Hi
-Arm
+Arm
P1_6
P1_7
Spare
Spare

6
The trimpot adjustments, MIN, MAX, IR COMP, and CUR LIM are checked at the factory using a typical motor at 240 VAC input.
Use the TRIMPOT SETTING CHART on page 7 to preset the trimpots for the proper setting for your application. The remaining
trimpot - ACCEL, is a variable acceleration and should be set for your particular application.
The trimpot chart is approximate. The chart is valid when using the speedpot or a 0-10/12 VDC input signal to set speed.
These adjustments are permanent; periodic readjustment is normally not needed. Operation of the control beyond ±10% of normal
line voltage could result in readjustments.
ADJUSTMENTS
WARNING: ALL POWER MUST BE TURNED OFF BEFORE PROCEEDING !!!
1. Recheck all wiring. Accidental grounds, loose or pinched wires on armature or speedpot wires may damage the control
when power is applied.
2. Check to see that incoming service is of correct voltage.
3. Turn speedpot to zero (fully CCW).
4. Turn power on and advance speedpot while observing motor.
WARNING: POWER MUST BE OFF BEFORE STEP 5 CAN BE ACCOMPLISHED!
5. If motor rotation is incorrect, turn power off at external disconnect and reverse +ARM and -ARM connections.
6. Check for satisfactory operation throughout the speed range.
7. If operation is satisfactory, no readjustments are needed.
8. If instability or surging is observed, or maximum speed is higher than desired, see section “TRIMPOT ADJUSTMENT”.
9. For other problems, consult section “IN CASE OF DIFFICULTY”.
START-UP PROCEDURE
Warning: Do not attempt to perform a Hi-Pot test across AC lines with control in circuit.
This will result in immediate or long term damage to the control.
INSIDE OF COVER
SPEEDPOT
DPST SWITCH
(black)
Endplate with holes for 1/2" NPT conduit
-11
-9-8-4 -5 -6 -7-1 -2 -3
P2
Inhibit
Pin
P1
Pot Lo
Wiper
Pot Hi
P1_6
P1_7
AC
AC
motor
armature ac input
field*
chassis
ground
Switched AC Switched AC
Min Max Accel IR Comp Cur. Lim. LO (orange)
HI (white)
WIPER (red)
(white)
-10
-Arm
+Arm
(brown)
(yellow)
(purple)
(gray)
(blue)
(red)
-1 -2
P3
250G SERIES -29 HOOK-UP DIAGRAM
Inthe250Genclosure kit(250GCK29)youwillfind2endplates,
a cover assembly (containing speedpot, DPST switch, gasket
and wiring), and 8 screws.Install both endplates using (4) #5
screws, and the cover assembly, using (4) #6 screws.Before
screwing down cover assembly, route wiring through conduit
holes in endplate by terminal strip.
* Used for shunt wound motors only! No connection is made to
these terminals when using permanent magnet motors.

IR IR
7
1. CW rotation increases time of acceleration.
ALLOWS ADJUSTMENT OF ACCELERA-
TION by user.
1. TURN DRIVE POWER OFF !!
2. Connect a DC ammeter between A1 on the motor and
+ARM on the control. This is in series with the motor.
3. Turn power on.
4. Set speedpot at the 50% position.
5. Set CUR LIM trimpot fully CCW.
6. Apply friction braking to the motor shaft until motor is
stalled (zero RPM).
7. While motor is stalled, set current at 125% of rated
nameplate motor armature current by adjusting the
CUR LIM trimpot.
LIMITSDCMOTOR ARMATURECURRENT
(Torque) to prevent damage to the motor
or control.The current limit is set for the
rated motor current. CW rotation of this
trimpot increases the armature current
(or torque produced).
1. Set speedpot at 50%,
2. Observe motor speed at no load condition.
3. Apply a full load to the motor.
4. Adjust IR COMP trimpot CW to obtain the same motor
speed as with no load.
CALIBRATES SPEED REGULATION - Pro-
vides a means of improving motor speed
regulationinthearmaturefeedbackmode.
If a slowdown due to load change is of no
concern, rotate this trimpot fully CCW.
1. Set speedpot to zero (fully CCW).
2. Rotate MIN trimpot CW until motor rotates.
3. Slowly rotate MIN trimpot CCW until motor stops. NOTE:
If motor rotation at zero is desired, rotate MIN trimpot
CW until desired minimum speed is reached.
SETS MINIMUM MOTOR SPEED when
speedpot is set at zero. CW rotation will
increase minimum motor speed.
1. TURN DRIVE POWER OFF!!
2. Connect DC Voltmeter: + to +ARM, - to -ARM.
3. Set meter voltage range: (90VDC or 180VDC).
4. Turn power on. Set speedpot at 100%.
5. Adjust MAX trimpot to rated motor armature voltage as
shown on meter.
NOTE: A tachometer or strobe may be used in lieu of a meter.
Follow above steps, except adjust MAX trimpot to rated
motor base speed indicated by tachometer or strobe.
SETS MAXIMUM MOTOR SPEED when
speedpotisset atmaximum(100%rotation
CW).CWrotationof MAXtrimpotincreases
maximum motor speed.
TRIMPOT FUNCTION ADJUSTMENT
MAX
MIN
IR
COMP.
CUR.
LIM.
ACCEL
TRIMPOT ADJUSTMENT PROCEDURE

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


OPTION DESCRIPTION
-5 option Field or Factory Installed
Isolated 4-20 ma.Signal Follower Available on Chassis Only*
9
-7-6-5-4-3-2-1
P1
-11-9 -10-8
CURRENT
SOURCE
LINEARITY/GAIN ADJUSTMENT
+-
P16
250/500
125
(250G TERMINAL STRIP)
-7 option Enclosed - Factory Installed only
Isolated 4-20 ma. Signal Follower Chassis - Factory or Field Installed
with Auto/Manual Switch Chassis - switch & wiring are customer provided
DO NOT USE TRIMPOT CHART TO ADJUST MIN AND MAX TRIMPOTS ON MAIN BOARD. IF
ADJUSTMENT IS NEEDED THEN REFER TO THE SETUP PROCEDURE BELOW.
The -5 option is a 4-20 mA isolated signal card that replaces the speedpot to control speed. The 4-20 mA signal input can be
either grounded or ungrounded. The board sets on spacers screwed to the pot HI, Wiper, and LO terminals on the main board
using long screws. The current source connects to the + and - two position terminal strip (P16-1 and -2) on the -5 option board.
The Linearity trimpot on the -5 option board is set at the factory for proper linearity, however this trimpot may need to be re-
set after tuning the Max and Min trimpot settings on the control for your specific application. If needed then refer to the setup
procedure below.
The -7 option is also a 4-20 mA isolated signal card but it allows the control to be run in either the Manual mode via a speed
pot or the Auto mode via the 4-20 mA signal. This option also includes a Balance trimpot which is used to scale the maximum
speed in the Manual mode. It is factory set so the maximum speed in Manual mode equals the maximum speed in Auto mode.
The Linearity trimpot on the -7 option board is set at the factory for proper linearity, however this trimpot may need to be re-set
after tuning the Max and Min trimpot settings on the control or if the Balance trimpot on the –7 must be reset for your specific
application. If needed then refer to the setup procedure below.
-7-6-5-4-3-2-1 P1
AUTO
MANUAL
RED
LO
HI
W
from P1-2 of 250G
-11-9
YELLOW
3PDT
SWITCH
-10-8
CURRENT
SOURCE
LINEARITY/GAIN
ADJUSTMENT
+-
P16
WHITE
RED
ORANGE
SPEEDPOT
AC AC
250/500
125
BALANCE
ADJUSTMENT
(250G TERMINAL STRIP)
JU1
JU3
JU2
-5 and -7 option Hookup Procedure

10
The following is the recommended procedure to set up the -5/-7 option on the 125/250/500 Series:
1) With the 125/250/530 oriented so that trimpots are along the top, adjust Min trimpot to minimum (full CCW) and Max trimpot
to 50%. The voltage is set below the typical motor voltage to make certain the drive is NOT in saturation before setting the -5/-7
board saturation point.
2) Set the Linearity/gain pot on the -5/-7 full CW. This is a 20 turn pot and you should hear a clicking with each turn when fully
up or just count 20 turns.
3) Make certain your motor is connected to +/-ARM output of the drive, the AUTO / MAN switch is in AUTO mode for -7
options, and source power for the control is turned on. (Note: For proper tuning this setup is best done on an unloaded motor.)
4) With power applied and a voltmeter monitoring motor output Vdc, apply 4mA to -5/-7 board. Check voltmeter reading and
adjust the Linearity/gain trimpot, R16, on the -5/-7 board CCW until motor output voltage is less than 0.1Vdc.
5) Now apply 20mA to the -5/-7 board and adjust the Max trimpot to a voltage that is 5 volts (15 volts for the 250G series
controls) above the final desired max motor voltage output. Adjust the Linearity/gain trimpot on the -5/-7 board CCW until the
motor output voltage decreases to the desired max voltage set point.
6) Now, apply 4mA to the -5/-7 board again and adjust the Min trimpot to deadband or the desired minimum motor voltage
output. The deadband point is where you are at 0Vdc and any further increase of the Min trimpot would result in an output to
the motor. Re-apply 20mA to the -5/-7 board and verify max output has not changed. A small adjustment may be needed to the
Max trimpot to reset to desired max output.
7) Adjust 4-20 input to 12mA. If tuned properly the output voltage of an unloaded motor should be within a few volts of ½ output
(based on max output setting above).
-7 option only: With 20mA applied to the -7 in Auto mode, move AUTO/MANUAL switch to MANUAL.
8) In manual mode turn the speedpot full CW, note motor voltage output reading on voltmeter. If not equal to output at 20mA in
Auto Mode, adjust the Balance trimpot on the -7 board (CW or CCW) until the same reading is achieved. The motor output Vdc
should not change more than 1 Vdc when flipping back and forth between AUTO and MANUAL position.
-17B option Factory Installed Only
Acceleration Time Changes Available on all Models
Standard acceleration is variable from 0.5 to 8.0 seconds with the trimpot. The deceleration is between 0.06 and 0.8 seconds.
This option extends the maximum acceleration so the range is between 0.8 and 20.0 seconds. Furthermore, this option has the
deceleration time equal to the acceleration time, so deceleration range is also 0.8 to 20.0 seconds (depends on Accel setting,
not an independent setting).
USE STANDARD HOOK-UP INSTRUCTIONS

MIN MAX ACCEL IR COMP
CURRENT LIMIT
orange
red
white
-4-1 -2 -3
1 ohm 3.9K ohm
P1
P1-4 P1-5 P1-10 P1-11
ARM 1 ARM 2ACAC
AC INPUTARM INPUT
-7
-6
-3
-2
-1
P1
4PDT
-4
-11
-10
-5
-9
-8
ARM
ARM
AC
AC
P3-1 P3-2 P1-8 P1-9
P1-4 P1-5 P1-10 P1-11
AC INPUTARM INPUT
-7
-6
-3
-2
-1
P1
4PDT SWITCH
P3
-4
-11
-10
-5
-2
-1
-9
-8
ARM
ARM
AC
AC
black
white
brown
yellow
red
blue
purple
or brown
gray or
yellow
brown
yellow
purple
or brown
gray or
yellow
11
-29 and -29B options -29 Enclosed Factory Installed Only
Manual Reversing -29B Chassis *able on Chassis
Permits reversing of motor.This is accomplished using a 4PDT blocked center switch.When switched between the forward/reverse
positions, a delay is encountered due to the blocked center position, which protects the control from any voltage that may be at
the armature terminals. The center position is OFF/NEUTRAL.
THE MOTOR MUST COME TO A COMPLETE STOP BEFORE CHANGING DIRECTIONS. IF THE MOTOR DOES NOT COME
TO A COMPLETE STOP, SERIOUS DAMAGETOTHE CONTROL MAY RESULT. BYPASS OF THE CENTER BLOCK OFTHE
SWITCH MAY RESULT IN DAMAGE TO THE CONTROL.
-29 (ENCLOSED VERSION) A 4PDT blocked center-off switch is factory installed into the cover assembly. The two position
terminal strip (P3) is factory installed on the main board (below). The output on P3 is the switched (FWD/REV) output and the
output of terminals P1-4 and P1-5 is not switched.
-29B (CHASSIS VERSION) * 250G control with a 4PDT switch (factory provided).The customer provides interconnecting wiring.
-34A option Factory Installed Only
Torque Control Available Enclosed Only
The TORQUE (CURRENT LIMIT TRIMPOT) is controlled by the faceplate mounted potentiometer.Thus, the internally mounted
MIN trimpot becomes the Speedpot.This speedpot may be moved to a remote location by removing the fixed resistors connected
on P1-1 through P1-3, and installing a standard 5K 2W potentiometer.
DO NOT USE TRIMPOT SETTING CHART !

P3-1 P3-2 P1-8 P1-9
P1-4 P1-5 P1-10 P1-11
AC INPUTARM INPUT
-7
-6
-3
-2
-1
P1
4PDT SWITCH
P3
-4
-11
-10
-5
-2
-1
-9
-8
ARM
ARM
AC
AC
black
white
brown
yellow
red
blue
purple
or brown
gray or
yellow
brown
yellow
purple
or brown
gray or
yellow
-55H2 OPTION (CHASSIS)
This option card allows for the use of either a grounded or
non-grounded remote DC signal such as 0 to 5 through 0
to 250Vdc, 4-20mA current, or a remote speed pot. The DC
input signal type can be selected for voltage (Vin) or current
(4-20mA) via the JP2 jumper clip. There is a Hi/Lo range
jumper (P4) selection that should be set to the (Lo) setting
when using a 4-20mA signal or voltage ranges of 0-5 through
0-25Vdc. When using voltage ranges of 0-25 through 0-250
this jumper must be set to (Hi). The GAIN trimpot is used to
set full linear output in reference to the input signal range. The
output of this remote signal isolation board is a linear signal
that is proportional to the remote input signal being supplied.
(FOR SHUNT WOUND MOTOR, SEE PAGE 4 OF MANUAL
FOR FIELD CONNECTIONS).
CAUTION: DO NOT use TRIMPOT ADJUSTMENT CHART. Set
pots using directions in following SET-UP PROCEDURE.
-56H2 OPTION (CHASSIS)
The -56H2 option is identical to the -55H2 option with the
added ability to have remote Auto/Manual switching.
See -55H2 for more further detail.
(FOR SHUNT WOUND MOTOR, SEE PAGE 4 OF MANUAL
FOR FIELD CONNECTIONS).
CAUTION: DO NOT use TRIMPOT ADJUSTMENT CHART.
Set pots using directions in the previous SET-UP
PROCEDURE.
-55H2 and -56H2 options Factory or Field Installed
Isolated Voltage Input Chassis Version
ADJUSTMENT PROCEDURE FOR -55H2 & -56H2 OPTIONS
1. With NO power at the control, connect a DC voltmeter (meter must not be grounded) to control outputs as follows: Meter
COMMON to the -ARM terminal; Meter POSITIVE to the +ARM terminal. Select correct meter range (0-90V or 0-180V).
2. Preset GAIN trimpot (option board) fully CCW, place range jumper clip in proper position.
3. Preset control as follows: MIN and IR COMP. fully CCW, MAX at 50%.
4. Apply desired AC voltage to control and option board.
5. With 0 volts into option board, adjust MIN trimpot on control to eliminate deadband. To do this, increase MIN fully CW,
then adjust CCW until meter reads 0 volts.
6. Apply maximum input voltage to option board input.
7. Adjust GAIN until no further change in voltage output occurs and turn CCW until a 5V drop occurs, then set control MAX
to 90VDC (180VDC for 240V input).
8. For Closed Loop systems the IR COMP. should remain fully CCW. For Open Loop systems, set IR as per set-up procedure.
9. Some interaction between trimpots may occur. Recheck the Min trimpot setting and repeat steps 5 through 7 as needed.
12
AC1 AC2
-ARM +ARM
CUSTOMER
SIGNAL
CUSTOMER
COMMON
MIN MAX ACCEL IR COMP CUR LIM
JU2
POT LO
AC
P1
P2
JU4
P4
P3
JP2
-1
-2
-3
4-20
Vin
-1 -2 -3
ORANGE
RANGE
JUMPER
CONNECTOR GAIN
TRIMPOT
Vin or 4-20mA
CONNECTOR
AC1 AC2
-ARM +ARM
CUSTOMER
SIGNAL
CUSTOMER
COMMON
MIN MAX ACCEL IR COMP CUR LIM
JU2
POT LO
AC
P1
P2
JU4
P4
P3
P5
JP2
-1
-2
-3
4-20
Vin
-1 -2 -3
ORANGE
RANGE
JUMPER
CONNECTOR GAIN
TRIMPOT
AUTO
MANUAL
1
2
3
yellow
white
1/2 OF DPDT
SWITCH
CONNECTS
UNDER WIPER
SCREW P1-2
DPDT CENTER-OFF SWITCH
TERMINAL DESIGNATION
(BACKSIDE VIEW)
1
3
2
6 - NO CONNECTION
4 - NO CONNECTION
5 - NO CONNECTION
orange
Vin or 4-20mA
CONNECTOR
INPUT IMPEDANCE:
1.2M ohm on high scale
150K ohm on low scale

3PDT Switch
motor ac input
CUSTOMER SUPPLIED WIRING
(INSIDE OF COVER)
-56H2 OPTION BOARD
common signal
INPUT IMPEDANCE:
1.2MΩon high scale
150KΩon low scale
NOTE:
SOME FACTORY
WIRING IS NOT
SHOWN FOR CLARITY
-4 -5 -6 -7
P2
Inhibit
Pin
P1
Pot Lo
Wiper
Pot Hi
-Arm
+Arm
P1_6
P1_7
AC AC
Switched AC Switched AC
Min Max Accel
IR
Comp
Cur.
Lim.
-11-9-8 -10-1 -2
Speedpot
(white)
(red)
(yellow)
(brown)
(black)
(blue)
(black)
(red)
(brown)
(yellow)
P2
P4
P3
P5
JP2
-1 -2 -3
4-20 Vin
RANGE
JUMPER
CONNECTOR*
GAIN
TRIMPOT
(white)
(orange)
CUSTOMER
SUPPLIED
WIRING
(orange)
(white)
BALANCE
TRIMPOT
(white)
Vin or 4-20mA
CONNECTOR
-1 -3
13
(continued)
IN CASE OF DIFFICULTY
If a newly installed control will not operate, it is possible that a terminal or connection is loose. Check to make sure that all con-
nections are secure and correct. If control still doesn't operate, refer to the following chart.
replace fuse
install proper service
adjust speedpot CW to start
replace motor brushes
check that motor or load is connected
to armature terminals
check that speedpot low wire is connected
check - should be above 108V
reduce load
replace motor brushes
see ADJUSTMENT PROCEDURE
see ADJUSTMENT PROCEDURE
see ADJUSTMENT PROCEDURE
current must be greater than 150 mA D.C.
see ADJUSTMENT PROCEDURE
reduce speed
check - should be above 108V
reduce load
replace
replace
call Dart Distributor or Representative
check TERMINAL STRIP WIRING for correct
wiring instructions (note AC line
connection in particular)
check wiring
call Dart Distributor or Representative
Motor doesn't operate
Armature output voltage
cannot be adjusted, output
is a constant DC level
Motor stalls, or runs very
slowly with speedpot
turned fully CW
Motor hunts
Repeated fuse blowing
Motor runs but will not
stop
- blown fuse
- incorrect or no power source
- speedpot set at zero
- worn motor brushes
- no motor or load connected
- speedpot low connection open
- low voltage
- overload condition
- worn motor brushes
- max speed set incorrectly
- too much IR Comp.
- motor is in current limit
- motor not pulling enough current
- max trimpot set too high
- motor speed is above rated speed
- low voltage
- overload condition
- worn motor brushes
- defective motor bearings
- defective electrical component
- incorrect wiring (enclosed version)
- defective wiring
- defective component
PROBLEM POSSIBLE CAUSE(S) CORRECTIVE ACTION(S)
If control still will not operate, consult your Dart Distributor or Representative.
-56H2 option Factory Installed Only
Isolated Voltage Input Enclosed Version
Note: Balance Trimpot factory set
- Do NOT re-adjust.
*Jumperclip is used to selectinput
voltagerange.When installed from
P4-1toP4-2, therangeis0-25VDC
through0-250VDC;wheninstalled
fromP4-2to P4-3,rangeis 0-5VDC
through 0-25VDC.
See -55H2 and -56H2 Adjustment
Procedures.

SPECIFICATIONS
AC input voltage .................................................................................................................................. ±10% of rated line voltage
Acceleration ........................................................................................................................ 0.5 to 8.0 seconds (note -17B option)
Amps - DC output ................................................................................................................................ 150 mA to 10.8 Amps D.C.
Controller overload capacity ......................................................................................................................... 150% for one minute
Current limit trimpot range ............................................................... 0.3 to 3.0 Amps D.C. (251G); 1.0 to 15.0 Amps D.C. (253G)
Deceleration (dependent on acceleration time setting) .......................................................................... .06 to .80 second range
Dimensions and weight:
TYPICAL MOTOR CURRENTS
250G SERIES PARTS PLACEMENT & LIST
14
ENGLISH
METRIC
5.53"
5.53"
140mm
140mm
7.25"
7.00"
184mm
178mm
3.50"
1.55"
89mm
39mm
25.50 oz.
16.25 oz.
723 grams
413 grams
WEIGHTHEIGHTLENGTHWIDTH TYPE
enclosed
chassis
enclosed
chassis
RESISTORS
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
15K 8W
2.7K
2.7K
1.2M
180K
82K
470K
15K
250K (ACCEL)
5K SPEEDPOT*
10K
5K (MIN)
470K
300K
5K (C.L.)
4.7K
390K
4.7K
150K
NOTE: ALL RESISTORS 1/2W UNLESS SPECIFIED
* CUSTOMER WIRED SPEEDPOT
DIODES
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
1N4005
1N4005
1N914B
1N5242B
L512FY131
L512FY131
L512FY131
1N914B
1N4005
1N5233B
ACTIVE DEVICES
Q1
Q2
Q3
Q4
Q5
Q6
2N6027
3052 MOC
L512FY131
L512FY131
LM324N IC
275V G-MOV
MISC. PARTS
F1
H1
JU1
JU2
P1
P2
10 AMP FUSE (Bussman ABC or Little Fuse 314
Series ceramic fuses)
S-8201-1X FUSE HOLDER
1.75" - 16GA. SOLID INS. WIRE
2.50" - 16GA. SOLID INS. WIRE
11 POS. TERMINAL STRIP
1/4" SPADE PIN TERMINAL
CAPACITORS
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
10uf 35V
.01uf 100V
.001uf 1KV
.033uf 400V
.1uf 50V
22uf 16V
.1uf 50V
.001uf 1KV
.22uf 250V
.01uf 100V
.01uf 100V
.068uf 250V
(across-the-line)
Q1
P1-1
Q5
D1
D8
C6
C1
R28
C5
C2
Q2
R37
Q6
R12
P1-2 P1-3 P1-4 P1-5 P1-6 P1-7 P1-8 P1-9 P1-10
R22 R9 R23 R15
D2
D9
D4
D10
R1
R29
R30
R31
R21
C10
R32
R8
R4
R17
R20
C3
R19 R27
R36
C8
R35
R2
R5
R6
R7
C7
C9
R34
C11
R33 R18
R14
R13
D3
R11
R16
R3
R25
R26
P1-11
F1
JU2
H1
R24
JU1
GENTRON PKG.
D5, D6, D7, Q3, Q4
P2
C4
C12
R20
R21
R22
R23
R24
R25
R26
R27
R28
R29
R30
R31
R32
R33
R34
R35
R36
R37
1K
1K
50K (MAX)
100Ω(I.R.)
.01Ω5W
390Ω
390Ω
1K
20K 1/4W
10K
180K
390K
47K
470K
100K
470Ω
91K
1Ω
R24 ... .1& 5W
251G-12C CHANGES:
R10... Connect to 3 wires
from R15 position
R15 .. Delete trimpot
-34A CHANGES:
C9 .... 2.2uf 50V N.P.
R28 .. 10K
-17B CHANGES:
ENGLISH
METRIC
5.530"
5.530"
140mm
140mm
7.250"
7.000"
184mm
178mm
3.500"
1.550"
89mm
39mm
23.50 oz.
16.25 oz.
597 gms.
413 gms.
WIDTH LENGTH DEPTH WEIGHT
Enclosed
Chassis
Enclosed
Chassis
TYPE
0.26
0.20
-----
-----
.70
.50
-----
-----
1.80
1.40
-----
-----
3.50
2.70
1.80
1.40
1/50 1/20 1/8 1/4
Horsepower
Typical AC Amps (120VAC)
Typical Arm Amps (120VAC)
Typical AC Amps (240VAC)
Typical Arm Amps (240VAC)
4.40
3.40
2.20
1.70
1/3
6.50
5.00
3.30
2.50
1/2
9.30
7.20
4.80
3.70
3/4
13.20
10.20
6.50
5.00
1.0
-----
-----
9.70
7.50
1.5
-----
-----
12.90
9.90
2.0
Drive service factor ................................................................................................................................................................... 1.0
Efficiency ..................................................................................................................................................................... 85% typical
Input frequency ....................................................................................................................................................... 50 or 60 Hertz
Max. trimpot speed range ................................................................................................................. 66% to 110% of base speed
Min. trimpot speed range .............................................................................................................. 0% to 30% of maximum speed
Minimum external impedance (pot hi to pot low) ............................................................................................................. 5K ohms
Power devices ....................................................................................................................................... packaged full wave bridge
Shunt field voltage .........................................................100VDC for 120VAC input; 200VDC for 240VAC input; 1 amp maximum
Speed control ......................................................................... via 5K ohms 2W linear potentiometer or 0-10VDC isolated signal
Speed range ........................................................................................................................................................................... 50:1
Speed regulation ............................................................................................................................................ ±1% of base speed
Temperature range ............................................................................................................. -10oto 45oC. ambient (15oto 115oF. )
Transient protection ............................................................................................................................................................ G-Mov
Type ramp of accel/decel ...................................................................................................................................................... linear

15
250G SERIES SCHEMATIC
ALL RESISTORS 1/2W UNLESS NOTED OTHERWISE
Q2 .................................. 3052 MOC Q3, Q4, D5, D6, D7 ....... L512FY131 GENTRON Q5 .................................. LM324N IC F1 * ................................ BUSS ABC-10 or LITTLEFUSE 314010
NOTES:
WIPER
P1-2
+12V
9
10
8
+
-
5 6
7
+
-
R30
180K
ACCEL
R9
250K
R29
10K
C10
.01uf
100V
R33
470K
R34
100K
C9
.22uf
250V
Q5-2
Q5-3
R31
390K
LO
P1-1
HI
P1-3
R35
470
OHM
MIN
R12
5K
R32
47K
REMOTE
SPEEDPOT
R10
5K
+12V
13 12
14
+
-
Q5-4
4
11
3 2
1
+
-
Q5-1
+12V
A
AC2
P1-11
B
Q4
L512F
Q3
L512F R25
390 OHM
F1 *
R27
1K
R26
390 OHM
+ARM
P1-5
-ARM
P1-4
MOTOR
R19
150K
R20
1K
R21
1K
MAX
R22
50K
R17
390K
+TACH
D7
L512F
R24
.01 OHM
5W
R8
15K
-FIELD
R7
470K
R11
10K
D3
1N914B
C7
.1uf
50V
R4
1.2M
C5
.1uf
50V
R6
82K
R5
180K
C4
.033uf
400V
C2
.01uf
100V
C6
22uf
16V
R18
4.7K
R16
4.7K
R13
470K
IR COMP.
R23
100 OHM
CUR. LIM.
R15
5K
R14
300K
D5
L512F D6
L512F
B
A
Q1
2N6027
C1
10uf
35V
D4
1N5242B
D8
1N914B
R1
15K
8W
R2
2.7K
P1-6
D2
1N4005
B
D1
1N4005
A
+FIELD
P1-7
SENSE RES.
P2
AC1
P1-10
Q6
275V
G-MOV
JU1
C3
.001uf
1KV
R3
2.7K
1 2
Q2-1
3052 MOC
4 6
R36
91K
C8
.0047uf
1KV
Q2-2
3052
MOC
D10
1N5233B
D9
1N4005
C11
.01uf
100V
R28
20K 1%
1/4W
+12V
+12V
SPARE
P1-9
SPARE
P1-8
R37
1 OHM
JU2
+12V
C12
.068uf
250V

16
NOTES:

1-Sp
GARANTIA................................................................................................................................................................................... 1
INTRODUCCION.......................................................................................................................................................................... 2
CARACTERISTICAS DE CONTROL........................................................................................................................................... 2
DIMENSIONES DISIPADOR TERMICO....................................................................................................................................... 2
ENSAMBLE DEL JUEGO DE POTENCIOMETRO DE VELOCIDAD "SPEEDPOT" ................................................................. 3
PROCEDIMIENTO DE MONTAJE ............................................................................................................................................... 3
SELECCION DE MODELO.......................................................................................................................................................... 3
PROCEDIMIENTO DE ALAMBRADO Y FUSIBLES................................................................................................................... 4
ALAMBRADO DE LA BANDA DE TERMINALES ...................................................................................................................... 4
DIAGRAMAS DE CONEXION PARA MODELOS DE CHASIS Y UNIDAD CERRADA ...........................................................5-6
PROCEDIMIENTO DE ARRANQUE Y AJUSTE ........................................................................................................................ 6
PROCEDIMIENTO DE AJUSTE DEL POTENCIOMETRO REGULADOR "TRIMPOT" ........................................................... 7
CUADRO DE AJUSTE DEL POTENCIOMETRO REGULADOR "TRIMPOT" ........................................................................... 7
MODIFICACIONES DEL CONTROL ........................................................................................................................................... 8
OPERACION DE DOS VELOCIDADES ................................................................................................................................ 8
FRENADO DINAMICO ........................................................................................................................................................... 8
RETROALIMENTACION DEL TACOMETRO ......................................................................................................................... 8
INSTRUCCIONES PARA EL INHIBIDOR .............................................................................................................................. 8
DESCRIPCION DE LAS OPCIONES .....................................................................................................................................9-13
OPCIONES -5....................................................................................................................................................................9-10
OPCIONES -7....................................................................................................................................................................9-10
OPCIONES -11/ -17B/ -29/ -29B/ -34A ...........................................................................................................................10-11
EN CASO DE DIFICULTAD ....................................................................................................................................................... 13
ESPECIFICACIONES ................................................................................................................................................................ 14
CORRIENTE TIPICA DE LOS MOTORES................................................................................................................................. 14
LISTA DE PARTES DE REPUESTO DE LA SERIE 250G ........................................................................................................ 14
DIBUJO ESQUEMATICO DE LA SERIE 250G ......................................................................................................................... 15
PROCEDIMIENTO DE REPUESTOY LINEA DE PRODUCTOS ................................................................. CONTRAPORTADA
(1) "speedpot" = Potenciómetro de Velocidad
(2) "trimpot" = Potenciómetro Regulador
CONTENIDO
GARANTIA
Dart Controls Inc. (DCI) garantiza que sus productos están libres de defectos de materiales y mano de obra. El único derecho
que otorga esta garantía es que la fábrica DCI reemplace cualquier parte o partes del producto que dentro del término de doce
(12) meses a partir de la entrega del producto al comprador la parte o partes defectuosas sean devueltas a la fábrica de DCI con
todos los costos de transporte prepagados, y las cuales DCI encuentre a su satisfacción que en realidad son defectuosas. Esta
garantía no cubre los defectos en montaje por personas distintas a DCI, ni ningún articulo que haya sido reparado o alterado por
personas distintas a DCI, ni cualquier artículo que DCI determine que ha sido usado en forma indebida. DCI no asume ninguna
responsabilidad por las características de diseño de ninguna unidad o su operación en un circuito o ensamblaje. Esta garantía
sustituye cualquier otra garantía expresa o implícita. Por lo tanto cualquier otra responsabilidad u obligación de parte de DCI,
incluyendo daños consecuenciales quedan aquí expresamente excluidos.
NOTA: Revise cuidadosamente el control para detectar daños sufridos en el transporte.Avise inmediatamente de cualquier daño
a la compañía transportadora. No trate de operar el drive si es evidente que ha sufrido daños en el circuito o en cualquiera de
sus componentes electrónicos.
Toda la información contenida en este manual se considera correcta, sin embargo datos e información que aparecen en el
manual están sujetos a cambio sin aviso previo. DCI no garantiza en ninguna forma esta información o datos. Más aún, DCI
no es responsable por omisiones o errores o daños consecuenciales causados por el usuario del producto. DCI se reserva el
derecho de hacer cambios de fabricación que pueden no estar incluidos en este manual.
ADVERTENCIA
La instalación u operación inadecuadas de este control pueden causar lesiones al personal o fallas de control. El
control debe instalarse de acuerdo con los Códigos de Seguridad nacionales, estatales y locales. Asegúrese de que la
corriente de alimentación está desconectada antes de tratar de dar mantenimiento al control o remover cualquiera de
sus componentes!!! Si el punto de desconexión de la corriente no está a la vista,asegúrelo en posición desconectada y
coloque un aviso para evitar una aplicación inesperada de la corriente. Unicamente electricistas calificados o personal
de mantenimiento calificado deben realizar tareas de mantenimiento o reparación eléctricos. Nunca debe verificarse la
continuidad de un circuito haciendo corto circuito en los terminales con un destornillador o herramienta metálica.

2-Sp
INTRODUCCION
• El control de velocidad variable para motores de CD* de la serie 250G de Dart es un instrumento versátil de aplicación general, clasificado
hasta 2HP de potencia y disponible, montado en chasis o en unidad cerrada con diversas opciones para aplicaciones específicas.
• El modelo 251G se ofrece con un rango ajustable desde 1/50 hasta 1/8 HP con corriente de entrada de 120VCA.
• El modelo 253G tiene voltaje dual de entrada (puede acomodar 120 o 240VCA). Se ofrece con un rango ajustable desde 1/8 hasta 1 HP
para 120VCA y desde 1/4 hasta 2 HP para entrada de 240VCA.
• Los controles están diseñados para motores de imán permanente de CD, de devanado en derivación y algunos motores de tipo Universal
(CA/CD) en los rangos de potencia (HP) especificados arriba.
• El voltaje de CA de entrada también se convierte a onda ajustable completa rectificada de voltaje CD (usando el puente que viene empacado)
para operar el motor de CD. También una onda completa de voltaje de campo se suministra para motores de devanado en derivación (vea
la página 4 donde se listan los voltajes).
• El control incluye una protección para voltaje transiente con límite ajustable de corriente y un fusible de CA para protección.También incluye
velocidades máximas y mínimas ajustables junto con aceleración ajustable y compensación de IR. La retroalimentación de tacómetro se
obtiene a través de una conexión a la clavija (P2) en el tablero de circuito impreso.
• La serie 250G tiene una rampa lineal de aceleración/ desace-leración.
• El control tiene una banda de terminales tipo barrera para todo el alambrado de potencia y control.
• El modelo cerrado usa un ensamble de cubierta empaquetada, clasificada como NEMA 4/12.
• El control está reconocido por U.L. bajo el Standard 508, U.L. File No. E78180 (N).
PARA LA VERSION SOBRE CHASIS: DEJE UNA ALTURA LIBRE DE 3,9 CM Y UNA DISPONIBILIDAD DE LARGO TOTAL DE 18,00 CM
PARA LA VERSION CERRADA: PERMITA UNA ALTURA LIBRE DE 8,9 CM Y UNA LONGITUD TOTAL DE 19,00 CM
CARACTERISTICAS DE CONTROL
MIN. SPEED (velocidad mínima) - Permite el ajuste de la velocidad del motor cuando el "speedpot" se fija en el mínimo (giro total a la izquierda).
Esto permite que el usuario pueda eliminar la "banda muerta" en el control principal de velocidad, permitiendo la calibración a cero. Al girar el
"trimpot" de "MIN" en la dirección de las manecillas de reloj, se aumenta la velocidad mínima del motor.
MAX. SPEED (velocidad máxima) - Permite el ajuste de la velocidad del motor cuando el "speedpot" se ha fijado al máximo (giro máximo a la
derecha). Esta característica permite que el usuario elimine el extremo superior de la "banda muerta", lo cual proporciona velocidad máxima con
rotación máxima. Al girar el "trimpot" de "MAX" en la dirección de las manecillas de reloj se aumenta la velocidad máxima del motor.
ACCEL (aceleración) - Permite el ajuste de la aceleración del motor desde un mínimo de 0.5 segundos hasta aproximadamente 8.0 segundos.
El tiempo de desaceleración depende de la posición fijada en ACCEL. Para igualar el período de desaceleración, DECEL, al de aceleración,
ACCEL, consulte la opción -17B.
IR COMP. (regulación de velocidad) - Ajusta el control de salida para compensar cambios de velocidad causados por variaciones en la carga
del motor. A medida que la carga del motor aumenta, IR COMP. aumenta el voltaje de salida del control. Al girar el "trimpot" "IR COMP" en la
dirección de las manecillas del reloj se aumenta la compensación.
CUR.LIM. (límite de corriente) - Proporciona protección contra corriente excesiva de armadura, limitando la corriente máxima de la armadura que
puede proporcionar el control. Esta característica permite el ajuste del momento de torsión* máximo que el motor puede proporcionar. El ajuste
de límite de corriente (CUR.LIM.) está fijado en 125% de la clasificación de momento de torsión del motor, basado en su caballaje de potencia.
Al girar el "trimpot" "CUR. LIM." en la dirección de las manecillas de reloj se aumenta la corriente (de torsión) que el control puede proporcionar.
* En algunos países el momento de torsión se denomina "par".
TERMINAL INHIBIDOR EN CLAVIJA (P2) - Permite que el usuario pueda arrancar y parar fuertemente (rápidamente), o parar fuertemente con
un arranque suave a través de una rampa ajustable de aceleración, sin interrumpir las líneas de CA (vea la página 8).
BANDA DE TERMINALES - Permite la conexión de líneas de CA, conductores del motor, campo del motor (si es necesario), y potenciómetro
de velocidad.
DIMENSIONES
17,7 CM
13,9 CM
14 CM 13 CM
1,9 CM
4 ABERTURAS DE 5 mm, TIPICAS DE
8 mm DE PROFUNDIDAD

CABALLOS VOLTAJE VOLTAJE AMPS UNIDAD
DE POTENCIA DE ENTRADA DE SALIDA DE SALIDA CC CHASSIS CERRADA
1/50
1/20 120 VCA 0-90 VCD 1.2A 251G-12C 251G-12E
1/8
1/8
1/4
1/3
1/2
3/4
1.0
1.5*
3-Sp
JUEGO DE ENSAMBLE DEL "speedpot"
120/240 VCA 0-90/0-180 VCD 10.8A 253G-200C 253G-200E
ADVERTENCIAS
1. Asegúrese de que la armazón de la unidad de control está conectada a tierra en forma apropiada.
2. Las conexiones de palanca no deben abrirse o cambiarse cuando el control está operando. Esto puede causar
serios daños.
3. En aplicaciones que no usan el "speedpot", las conexiones de entrada a los conductores de LO-WIPER-HI no
deben estar conectadas a tierra. El control puede sufrir serios daños a causa de una entrada conectada a tierra.
SELECCION DE MODELO
1. Encontrará 4 aberturas con un diámetro de 0,5 cm para el montaje del control.
2. El chasis del control puede usarse como templete.
3. Use elementos estándar de ferretería para el montaje.
MONTAJE
240 VCA 0-180 VCD 10.8A 253G-200C 253G-200E
Nota: La corriente mínima para todos los controles 250G es de 150 mA.
* No se ofrece con corriente de entrada de 120VCA - El voltaje de entrada determina la potencia máxima permisible en H.P.
La unidad 251G opera un motor de 90VCD en el rango H.P. de potencia desde 1/50 hasta 1/8 H.P., usando diferentes gradu-
aciones de "trimpot". La unidad 253G opera un motor de 90VCD en el rango H.P. de potencia desde 1/8 hasta 1 H.P., y un motor
de 180VCD en un rango de potencia desde 1/4 hasta 2 H.P., usando diferentes graduaciones de "trimpot".
PRECAUCION: No haga el montaje del control cuando la temperatura ambiente es menor de -10º (15°F)
o mayor de 45º C (115°F).
1,27 0,94 0,94
3,17
0,6
DIA.
1,11
0,40
DIA. 0,95
DIA.
SPEEDPOT
(5K 2W)
SOPORTE DE MONTAJE
DEL USUARIO
PLACA DE CUADRANTE
DE 5,08 cm DE DIAMETRO
ARANDELA
DE CIERRA
TUERCA
HEXAGONAL
BOTON DE
“SPEEDPOT”
3,15
SPEEDPOT LO (CCW) (NARANJA)
SPEEDPOT WIPER (ROJO)
SPEEDPOT HI (CW) (BLANCO)
UBICACION Y DIMENSIONES DE LAS ABERTURAS DEL "speedpot"