AC Tech SCF SERIES User manual

InstallationandOperationManual
SCF Series

Manual Number: IMSF09-e1
TABLE OF CONTENTS
1.0 GENERAL..................................................................................... 1
2.0 SCF DIMENSIONS....................................................................... 2
THROUGH-HOLE MOUNT DIMENSIONS................................. 4
3.0 SCF MODEL DESIGNATION CODE........................................ 6
4.0 SCF SPECIFICATIONS............................................................... 7
5.0 SCF RATINGS............................................................................... 7
6.0 INSTALLATION...........................................................................10
7.0 INPUT AC POWER REQUIREMENTS.....................................11
8.0 POWER WIRING......................................................................... 13
9.0 SCF POWER WIRING DIAGRAM.............................................14
10.0 CONTROL WIRING.................................................................... 15
11.0 SCF CONTROL WIRING DIAGRAMS..................................... 18
12.0 INITIAL POWER UP AND MOTOR ROTATION................... 23
13.0 PROGRAMMING THE SCF DRIVE..........................................25
14.0 PARAMETER MENU...................................................................29
15.0 DESCRIPTION OF PARAMETERS...........................................32
16.0 TROUBLESHOOTING................................................................ 47
17.0 SCF DISPLAY MESSAGES.........................................................49
APPENDIX A - THROUGH-HOLE MOUNT OPTION............51
APPENDIX B - PI SETPOINT CONTROL OPTION................55

INPUT POWER TERMINALS
OUTPUT (MOTOR) TERMINALS
CONTROL
TERMINAL
STRIP
3-DIGIT LED
DISPLAY
ELECTRONIC
PROGRAMMING
MODULE (EPM)
PROGRAMMING
BUTTONS
THE SCF SUB-MICRO DRIVE
GROUND
LUG

1
1.0 GENERAL
1.1 PRODUCTS COVERED IN THIS MANUAL
This manual covers the AC Tech SCF Series Variable Frequency Drive.
1.2 PRODUCT CHANGES
AC Technology Corporation reserves the right to discontinue or make modifications to the design of
its products without prior notice, and holds no obligation to make modifications to products sold
previously. AC Technology Corporation also holds no liability for losses of any kind which may
result from this action.
1.3 WARRANTY
AC Technology Corporation warrants the SCF Series AC motor control to be free of defects in
material and workmanship for a period of twelve months from the date of sale to the user, or eighteen
months from the date of shipment, which ever occurs first. If an SCF motor control, under normal
use, becomes defective within the stated warranty time period, contact AC Technology's Service
Department for instructions on obtaining a warranty replacement unit. AC Technology Corporation
reserves the right to make the final determination as to the validity of a warranty claim, and sole
obligation is to repair or replace only components which have been rendered defective due to faulty
material or workmanship. No warranty claim will be accepted for components which have been
damaged due to mishandling, improper installation, unauthorized repair and/or alteration of the
product, operation in excess of design specifications or other misuse, or improper maintenance.
AC Technology Corporation makes no warranty that its products are compatible with any other
equipment, or to any specific application, to which they may be applied and shall not be held liable
for any other consequential damage or injury arising from the use of its products.
This warranty is in lieu of all other warranties, expressed or implied. No other person, firm or
corporation is authorized to assume, for AC Technology Corporation, any other liability in
connection with the demonstration or sale of its products.
1.4 RECEIVING
Inspect all cartons for damage which may have occurred during shipping. Carefully unpack equipment
and inspect thoroughly for damage or shortage. Report any damage to carrier and/or shortages to
supplier. All major components and connections should be examined for damage and tightness, with
special attention given to PC boards, plugs, knobs and switches.
1.5 CUSTOMER MODIFICATION
AC Technology Corporation, its sales representatives and distributors, welcome the opportunity to
assist our customers in applying our products. Many customizing options are available to aid in this
function. AC Technology Corporation cannot assume responsibility for any modifications not
authorized by its engineering department.

2
2.0 SCF DIMENSIONS
INPUT
HP kW VOLTAGE MODEL H W D P R
0.25 0.20 120/208/240 SF103S 5.75 2.88 3.76 0.80 4.37
208 /240 SF203Y 5.75 2.88 3.76 0.80 4.37
0.5 0.37 120 /208/240 SF105S 5.75 2.88 3.76 0.80 4.37
208 /240 SF205Y 5.75 2.88 3.76 0.80 4.37
400/480 SF405 5.75 2.88 3.76 0.80 4.37
1 0.75 120 /208/240 SF110S 5.75 3.76 5.24 1.90 4.37
208 /240 SF210Y 5.75 2.88 4.56 1.60 4.37
208/240 SF210 5.75 2.88 4.56 1.60 4.37
400/480 SF410 5.75 2.88 4.56 1.60 4.37
480/590 SF510 5.75 2.88 4.56 1.60 4.37
1.5 1.1 120/208/240 SF115S 5.75 3.76 5.24 1.90 4.37
208 /240 SF215Y 5.75 3.76 5.24 1.90 4.37
208/240 SF215 5.75 2.88 5.56 2.60 4.37
400/480 SF415 5.75 2.88 5.56 2.60 4.37
Mounting Tab Detail
D
H
W
R
P
0.38"
T
U
V
S
Dia. Slot
If R < 6.30"
S = 0.19"
T = 0.38"
U = 0.18"
V = 0.69"
If R = 6.30"
S = 0.28"
T = 0.50"
U = 0.24"
V = 0.92"

3
INPUT
HP kW VOLTAGE MODEL H W D P R
2 1.5 208/240 SF220Y 5.75 3.76 6.74 3.40 4.37
208 /240 SF220 5.75 2.88 5.56 2.60 3.06
400 /480 SF420 5.75 2.88 5.56 2.60 4.37
480 /590 SF520 5.75 2.88 5.56 2.60 4.37
3 2.2 208/240 SF230Y 5.75 3.76 6.74 3.40 3.25
208 /240 SF230 5.75 2.88 5.56 2.60 3.06
400 /480 SF430 5.75 2.88 5.56 2.60 3.06
480 /590 SF530 5.75 3.76 6.74 3.40 4.37
5 3.7 208/240 SF250Y 7.75 5.02 7.18 3.40 4.81
208 /240 SF250 5.75 3.76 6.74 3.40 3.25
400 /480 SF450 5.75 3.76 6.74 3.40 3.25
480 /590 SF550 5.75 3.76 6.74 3.40 3.25
7.5 5.5 208 /240 SF275 7.75 5.02 7.18 3.40 4.81
400 /480 SF475 7.75 5.02 7.18 3.40 4.81
480 /590 SF575 7.75 5.02 7.18 3.40 4.81
10 7.5 208/240 SF2100 7.75 5.02 7.18 3.40 4.81
400/480 SF4100 7.75 5.02 7.18 3.40 4.81
480/590 SF5100 7.75 5.02 7.18 3.40 4.81
15 11 208/240 SF2150 9.75 6.68 8.00 3.60 6.30
400/480 SF4150 9.75 6.68 8.00 3.60 6.30
480/590 SF5150 9.75 6.68 8.00 3.60 6.30
20 15 208/240 SF2200 9.75 6.68 8.00 3.60 6.30
400/480 SF4200 9.75 6.68 8.00 3.60 6.30
480/590 SF5200 9.75 6.68 8.00 3.60 6.30
25 18.5 400/480 SF4250 9.75 6.68 8.00 3.60 6.30
480/590 SF5250 9.75 6.68 8.00 3.60 6.30

4
2.1 SCF THROUGH-HOLE MOUNT DIMENSIONS
INPUT
HP kW VOLTAGE MODEL H W D P
1 0.75 120/208/240 SF110SF 7.72 6.80 4.75 1.20
208/240 SF210YF 7.72 6.80 4.37 1.20
208 /240 SF210F 7.72 6.80 4.37 1.20
400 /480 SF410F 7.72 6.80 4.37 1.20
480 /590 SF510F 7.72 6.80 4.37 1.20
1.5 1.1 120/208/240 SF115SF 7.72 6.80 4.75 1.20
208/240 SF215YF 7.72 6.80 4.75 1.20
208 /240 SF215F 7.72 6.80 4.37 1.20
400 /480 SF415F 7.72 6.80 4.37 1.20
2 1.5 208/240 SF220YF 7.72 6.80 4.75 1.20
208 /240 SF220F 7.72 6.80 4.37 1.20
400 /480 SF420F 7.72 6.80 4.37 1.20
480 /590 SF520F 7.72 6.80 4.37 1.20
3 2.2 208/240 SF230YF 7.72 8.54 5.30 1.75
208 /240 SF230F 7.72 8.54 4.92 1.75
400 /480 SF430F 7.72 8.54 4.92 1.75
480 /590 SF530F 7.72 8.54 5.30 1.75
5 3.7 208/240 SF250YF 9.59 11.14 7.65 3.60
208 /240 SF250F 7.72 8.54 6.30 2.75
400 /480 SF450F 7.72 8.54 6.30 2.75
480 /590 SF550F 7.72 8.54 6.30 2.75
D
H
W
P

5
INPUT
HP kW VOLTAGE MODEL H W D P
7.5 5.5 208/240 SF275F 11.59 11.14 7.65 3.60
400/480 SF475F 9.59 11.14 7.65 3.60
480/590 SF575F 9.59 11.14 7.65 3.60
10 7.5 208/240 SF2100F 15.59 11.14 7.65 3.60
400/480 SF4100F 11.59 11.14 7.65 3.60
480/590 SF5100F 11.59 11.14 7.65 3.60
15 11 208/240 SF2150F 18.09 11.14 8.29 3.60
400/480 SF4150F 15.59 11.14 8.29 3.60
480/590 SF5150F 15.59 11.14 8.29 3.60
20 15 400/480 SF4200F 18.09 11.14 8.29 3.60
480/590 SF5200F 18.09 11.14 8.29 3.60
25 18.5 400/480 SF4250F 28.50 10.34 8.39 3.70
480/590 SF5250F 28.50 10.34 8.39 3.70
NOTE: Refer to Appendix A for mounting template dimensions for the Through-hole Mount option.

6
SF 2 10 Y
Series:
SF = SCF SeriesVariable Speed AC MotorDrive
Input Voltage:
1
2
4
5
= 120/208/240 Vac (For110 to 120 Vac and 208 to 240 Vac;50 or 60 Hz)
= 208/240 Vac (For 208, 220, 230, and 240 Vac; 50 or 60 Hz)
= 400/480 Vac (For 380,415, 440, 460 and 480 Vac; 50 or 60 Hz)
= 480/590 Vac (For 460,480, 550, 575 and 600 Vac; 50 or 60 Hz)
Horsepower:
03
05
10
= ¼ Hp
= ½ Hp
= 1 Hp
15
20
30
= 1½ Hp
= 2 Hp
= 3 Hp
50
75
100
= 5 Hp
= 7.5 Hp
= 10 Hp
150
200
250
= 15 Hp
= 20 Hp
= 25 Hp
Input: Phase:
S
Y= Single phase input only = Single or three phase input
No character indicates three phase inputonly
Mounting Style:
F
F1 = Through-hole mount with special heatsink = Through-hole mount without heatsink (customer supplies heatsink)
No character indicates panel or DIN rail mounting
Application Specific Options:
P
V= PI (setpoint control) software
= High Frequency Output – up to 1000 Hz
3.0 SCF MODEL DESIGNATION CODE
The SCF model number gives a full description of the basic drive unit (see example below).
EXAMPLE: SF210Y (SCF Series, 208/240 Vac, 1 HP, single or three phase input)

7
StorageTemperature -20 to 70 C
AmbientOperatingTemperature 0 to50 C (upto6kHzcarrier,derateabove6kHz)
AmbientHumidity <95%(non-condensing)
MaximumAltitude 3300ft(1000m)abovesealevel(withoutderating)
InputLineVoltages 120/208/240Vac,208/240Vac,400/480Vac,480/590Vac
InputVoltageTolerance +10%,-15%
InputFrequencyTolerance 48to62Hz
OutputWaveForm SineCodedPWM
OutputFrequency 0-240Hz(consultfactoryforhigheroutputfrequencies)
CarrierFrequency 4kHzto10kHz
ServiceFactor 1.00 (upto6kHzcarrier,derateabove6kHz)
Efficiency Upto98%
PowerFactor(displacement) 0.96orbetter
OverloadCurrentCapacity 150%for60seconds,180%for30seconds
SpeedReferenceFollower 0-10VDC,4-20mA
ControlVoltage 15VDC
PowerSupplyforAuxiliaryRelays 50mAat12VDC
AnalogOutputs 0-10VDCor2- 10VDC: Proportionaltofrequencyorload
DigitalOutputs Open-collectoroutputs: 50mAat30VDC
4.0 SCF SPECIFICATIONS
MODEL OUTPUT
NUMBER INPUT CURRENT POWER CURRENT
(NOTE1) HP kW PHASE (AMPS) (kVA) (AMPS)
0- 230/200/230 Vac STD THRU
SF103S 0.25 0.20 1 6.0/3.5/3.0 0.72 1.4/1.6/1.4 21 N/A
SF105S 0.5 0.37 1 9.2/5.3/4.6 1.1 2.2/2.5/2.2 28 N/A
SF110S 1 0.75 1 16.6/9.6/8.3 2.0 4.2/4.8/4.2 48 14
SF115S 1.5 1.1 1 24/13.9/12.0 2.9 6.0/6.9/6.0 73 17
NOTE1: SeeSection3.0formodelnumberbreakdown.
NOTE2: Thefirstcurrentratingslistedarefor120Vacinput,thesecondcurrentratingsarefor208Vacinput,
andthethirdcurrentratingsarefor240Vacinput. 120Vacinputyieldsthreephase230Vacoutput.
NOTE6: STD=standardunit;THRU=through-holemountunit. Valuesareworst-case(nottypical)for6kHz
carrierfrequencyatfullspeedandfullload.
HEATLOSS
(WATTS)
120/208/240 Vac
FORMOTORS INPUT(50-60 Hz)
RATED
SF100SERIES(NOTE2)
(NOTE6)
5.0 SCF RATINGS

8
MODEL OUTPUT
NUMBER INPUT CURRENT POWER CURRENT
(NOTE1) HP kW PHASE (AMPS) (kVA) (AMPS)
0- 200/230Vac STD THRU
SF203Y 0.25 0.20 1 3.6/3.2 0.76 1.6/1.4 19 N/A
SF203Y 0.25 0.20 3 1.9/1.7 0.71 1.6/1.4 19 N/A
SF205Y 0.5 0.37 1 5.4/4.7 1.2 2.5/2.2 26 N/A
SF205Y 0.5 0.37 3 3.1/2.7 1.1 2.5/2.2 26 N/A
SF210Y 1 0.75 1 10.6/9.2 2.2 4.8/4.2 49 18
SF210Y 1 0.75 3 5.8/5.1 2.1 4.8/4.2 49 18
SF215Y 1.5 1.1 1 13.9/12.0 2.9 6.9/6.0 82 23
SF215Y 1.5 1.1 3 8.0/6.9 2.9 6.9/6.0 82 23
SF220Y 2 1.5 1 14.8/12.9 3.1 7.8/6.8 86 26
SF220Y 2 1.5 3 9.1/7.9 3.2 7.8/6.8 86 26
SF230Y 3 2.2 1 19.7/17.1 4.1 11.0/9.6 130 29
SF230Y 3 2.2 3 12.4/10.8 4.4 11.0/9.6 130 29
SF250Y 5 3.7 1 29/26 6.1 17.5/15.2 212 40
SF250Y 5 3.7 3 19.6/17.1 7.1 17.5/15.2 212 40
0- 200/230Vac
SF210 1 0.75 3 5.8/5.1 2.1 4.8/4.2 41 11
SF215 1.5 1.1 3 8.0/6.9 2.9 6.9/6.0 69 13
SF220 2 1.5 3 9.1/7.9 3.3 7.8/6.8 78 15
SF230 3 2.2 3 12.4/10.8 4.5 11.0/9.6 117 20
SF250 5 3.7 3 19.6/17.1 7.1 17.5/15.2 187 22
SF275 7.5 5.5 3 28/25 10.3 25/22 286 31
SF2100 10 7.5 3 34/32 13.1 30/28 379 39
SF2150 15 11 3 54/48 20.0 48/42 476 51
SF2200 20 15 3 65/61 25.4 58/54 648 N/A
NOTE1: SeeSection3.0for modelnumberbreakdown.
NOTE3: Thehighercurrentratingsarefor208Vacinputandthelowercurrentratingsarefor240Vacinput.
NOTE6: STD=standardunit;THRU=through-holemountunit. Valuesareworst-case(nottypical)for6kHz
carrierfrequencyatfullspeedandfullload.
208/240Vac
(NOTE6)
SF200YSERIES(NOTE3)
SF200 SERIES (NOTE3) 208/240Vac
HEATLOSS
(WATTS)
FORMOTORS INPUT(50-60 Hz)
RATED

9
MODEL OUTPUT
NUMBER INPUT CURRENT POWER CURRENT
(NOTE1) HP kW PHASE (AMPS) (kVA) (AMPS)
0- 400/460Vac STD THRU
SF405 0.5 0.37 3 1.6/1.4 1.1 1.3/1.1 26 N/A
SF410 1 0.75 3 2.9/2.5 2.1 2.4/2.1 40 12
SF415 1.5 1.1 3 4.0/3.6 3.0 3.4/3.0 56 13
SF420 2 1.5 3 4.6/4.0 3.3 3.9/3.4 67 14
SF430 3 2.2 3 6.2/5.4 4.5 5.5/4.8 100 19
SF450 5 3.7 3 9.8/8.6 7.1 8.7/7.6 168 22
SF475 7.5 5.5 3 14.2/12.4 10.3 12.6/11.0 254 29
SF4100 10 7.5 3 18.1/15.8 13.1 16.1/14.0 310 37
SF4150 15 11 3 27/24 20.0 24/21 390 42
SF4200 20 15 3 35/31 25.8 31/27 530 57
SF4250 25 18.5 3 44/38 31.6 39/34 648 72
0- 460/575Vac
SF510 1 0.75 3 2.2/2.0 1.9/2.0 1.9/1.7 40 12
SF520 2 1.5 3 4.0 /3.5 3.3 /3.6 3.4 /3.0 67 13
SF530 3 2.2 3 4.7 /4.7 3.9 /4.8 4.2 /4.2 100 14
SF550 5 3.7 3 7.4 /7.4 6.1 /7.5 6.6 /6.6 168 19
SF575 7.5 5.5 3 11.2/11.2 9.3/11.4 9.9/9.9 254 29
SF5100 10 7.5 3 13.7/13.7 11.4/14.0 12.2/12.2 310 37
SF5150 15 11 3 22/22 18.3/22.5 19.0/19.0 390 42
SF5200 20 15 3 27/27 22.4/27.6 24/24 530 57
SF5250 25 18.5 3 31/31 25.8/31.7 27/27 648 72
NOTE1: SeeSection3.0formodelnumberbreakdown.
NOTE4: Thehighercurrentratingsarefor 400Vacinputandthelowercurrentratingsarefor480Vacinput.
NOTE5: Thehighercurrentratingsarefor 480Vacinputandthelowercurrentratingsarefor590Vacinput.
NOTE6: STD=standardunit;THRU=through-holemountunit. Valuesareworst-case(nottypical)for6kHz
carrierfrequencyatfullspeedandfullload.
(NOTE6)
SF500 SERIES (NOTE5) 480/590Vac
HEATLOSS
(WATTS)
SF400 SERIES (NOTE4) 400/480Vac
FORMOTORS INPUT(50-60 Hz)
RATED

10
WARNING!
Severe damage to the drive can result if it is operated after a long period of storage or inactivity
without reforming the DC bus capacitors!
6.0 INSTALLATION
SCF models are suitable for UL pollution degree 2 environment only, and MUST be installed in an
electrical enclosure which will provide complete mechanical protection and will maintain the internal
temperature within the drive’s ambient operating temperature rating. All drive models MUST be
mounted in a vertical position for proper heatsink cooling.
Maintain a minimum spacing around the drive of at least 1 inch on each side and 2 inches on the top
and bottom for units rated up to 5 HP. For units rated 7.5 - 25 HP, maintain at least 2 inches on each
side and 4 inches on the top and bottom. Allow more spacing if the drive is mounted next to other
heat-producing equipment. Do not mount drives above other drives or heat producing equipment.
Fans or blowers should be used to insure proper cooling in tight quarters.
In order to properly size an enclosure, the heat generated by the drive(s) must be known. Refer to the
HEAT LOSS columns in Section 5.0 - SCF RATINGS. The STD column is for standard units, and
the THRU column is for through-hole mount units (drives with the through-hole mount option still
generate some heat inside the enclosure that must be taken into account). An enclosure manufacturer
can then determine the required enclosure size based on the total heat generated inside the enclosure
(from the drive(s) and other heat sources), the maximum allowable temperature inside the enclosure,
the maximum ambient temperature outside the enclosure, and the enclosure properties.
The SCF Series is UL approved for solid state motor overload protection. Therefore, a separate
thermal overload relay is not required for single motor applications.
6.1 INSTALLATION AFTER A LONG PERIOD OF STORAGE
If input power has not been applied to the drive for a period of time exceeding three years (due to
storage, etc), the electrolytic DC bus capacitors within the drive can change internally, resulting in
excessive leakage current. This can result in premature failure of the capacitors if the drive is operated
after such a long period of inactivity or storage.
WARNING!
DRIVES MUST NOT BE INSTALLED WHERE SUBJECTED TO ADVERSE ENVIRONMENTAL
CONDITIONS SUCH AS: COMBUSTIBLE, OILY, OR HAZARDOUS VAPORS OR DUST;
EXCESSIVE MOISTURE OR DIRT; VIBRATION; EXCESSIVE AMBIENT TEMPERATURES.
CONSULT AC TECHNOLOGY FOR MORE INFORMATION ON THE SUITABILITY OF A
DRIVE TO A PARTICULAR ENVIRONMENT.
NOTE!
SCF drives are intended for inclusion within other equipment, by professional electrical installers.
They are not intended for stand-alone operation.

11
In order to reform the capacitors and prepare the drive for operation after a long period of inactivity,
apply input power to the drive for 8 hours prior to actually operating the motor.
6.2 EXPLOSION PROOF APPLICATIONS
Explosion proof motors that are not rated for inverter use lose their certification when used for variable
speed. Due to the many areas of liability that may be encountered when dealing with these applications,
the following statement of policy applies:
“AC Technology Corporation inverter products are sold with no warranty of fitness for a
particularpurposeor warranty ofsuitabilityforusewith explosion proofmotors. ACTechnology
Corporation accepts no responsibility for any direct, incidental or consequential loss, cost, or
damage that may arise through the use of its AC inverter products in these applications. The
purchaser expressly agrees to assume all risk of any loss, cost, or damage that may arise from
such application."
7.0 INPUT AC POWER REQUIREMENTS
The input voltage must match the nameplate voltage rating of the drive. Voltage fluctuation must not
vary by greater than 10% overvoltage or 15% undervoltage.
NOTE: Drives with dual input voltage ratings must be programmed for the proper supply voltage
(refer to Parameter 01 - LINE VOLTAGE SELECTION in Section 15.0 - DESCRIPTION OF
PARAMETERS).
The drive is suitable for use on a circuit capable of delivering not more than 5,000 RMS symmetrical
amperes at 5 HP and below, and 18,000 RMS symmetrical amperes at 7.5 - 25 HP, at the drive’s rated
voltage.
If the kVA rating of the AC supply transformer is greater than 10 times the input kVA rating of the
drive(s), an isolation transformer or 2-3% input line reactor must be added to the line side of the
drive(s).
Three phase voltage imbalance must be less than 2.0% phase to phase. Excessive phase to phase
imbalance can cause severe damage to the drive’s power components.
Motor voltage should match line voltage in normal applications. The drive’s maximum output voltage
will equal the input voltage. Use extreme caution when using a motor with a voltage rating which is
different from the input line voltage.
WARNING!
Hazard of electrical shock! Capacitors retain charge after power is removed. Disconnect incoming
power and wait until the voltage between terminals B+ and B- is 0 VDC before servicing the drive.

12
7.1 INPUT VOLTAGE RATINGS
SF100 Series drives are rated for 120/208/240 Vac, single phase, 50-60 Hz input. The drive will
function with input voltage of 120 Vac (+10%, -15%), at 48 to 60 Hz, or with input voltage of 208 to
240 Vac (+ 10%, - 15%), at 48 to 62 Hz.
SF200 Series drives are rated for 208/240 Vac, three phase, 50-60 Hz input. The drive will function
with input voltages of 208 to 240 Vac (+ 10%, - 15%), at 48 to 62 Hz.
SF200Y Series drives are rated for 208/240 Vac, single or three phase, 50-60 Hz input. The drive
will function with input voltage of 208 to 240 Vac (+10%, -15%), at 48 to 62 Hz.
SF400 Series drives are rated for 400/480 Vac three phase, 50-60 Hz input. The drive will function
with input voltages of 400 to 480 Vac (+ 10%, - 15%), at 48 to 62 Hz.
SF500 Series drives are rated for 480/590 Vac, three phase, 50-60 Hz input, and will function with
input voltages of 480 to 590 Vac (+ 10%, - 15%), at 48 to 62 Hz.
NOTE: Parameter 01 - LINE VOLTAGE SELECTION must be programmed according to the applied
input voltage. See Section 15.0 - DESCRIPTION OF PARAMETERS.
7.2 INPUT FUSING AND DISCONNECT REQUIREMENTS
A circuit breaker or a disconnect switch with fuses must be provided in accordance with the National
Electric Code (NEC) and all local codes.
The SCF drive is capable of withstanding up to 150% current overload for 60 seconds. Select a fuse
or magnetic trip circuit breaker rated at 1.5 times the input current rating of the drive (the minimum
size should be 10 amps, regardless of input current rating). Refer to Section 5.0 - SCF RATINGS.
Minimum voltage rating of the protection device should be 250 Vac for 120/208/240 Vac and 208/
240 Vac rated drives, and 600 Vac for 400/480 Vac and 480/590 Vac drives.
UL Class CC fast-acting, current limiting type fuses should be used when input fusing is required.
Select fuses with low I2 T values, rated at 200,000 AIC. Recommended fuses are Bussman KTK-R.
Similar fuses with equivalent ratings by other manufacturers may also be acceptable.

13
8.0 POWER WIRING
Note drive input and output current ratings and check applicable electrical codes for required wire
type and size, grounding requirements, over-current protection, and incoming power disconnect,
before wiring the drive. Size conservatively to minimize voltage drop.
Strip off 0.20 to 0.25 inches of insulation for input power, output power, and DC Bus wiring.
The input power, output power, and DC Bus terminals must be tightened to a torque of 4.0 to 4.5 lb-
in.
Input fusing and a power disconnect switch or contactor MUST be wired in series with terminals L1,
L2, and L3 for three phase input models. For 208/240 Vac single phase input models, use terminals
L1 and L2. For 120 Vac single phase input models, use terminals L1 and N. This disconnect must be
used to power down the drive when servicing, or when the drive is not to be operated for a long
period of time, but should not be used to start and stop the motor.
Repetitive cycling of a disconnect or input contactor (more than once every two minutes) may
cause damage to the drive.
8.1 WIRING FOR SINGLE PHASE OR THREE PHASE INPUT
If the drive is rated for 120/208/240 Vac single phase input, wire the input to terminals L1 and N for
120 Vac voltage, or wire to terminals L1 and L2 (do not wire to N) for 208/240 Vac input voltage.
Refer to Section 9.0 - SCF POWER WIRING DIAGRAM.
If the drive is rated for single and three phase input (SF200Y models), wire to terminals L1 and L2 for
single phase input, or wire to terminals L1, L2, and L3 for three phase input.
If the drive is rated for three phase input, wire the input to terminals L1, L2, and L3.
All three power output wires, from terminals T1, T2, and T3 to the motor, must be kept tightly
bundled and run in a separate conduit away from all other power and control wiring.
It is not recommended to install contactors or disconnect switches between the drive and motor.
Operating such devices while the drive is running can potentially cause damage to the drive's power
components. If such a device is required, it should only be operated when the drive is in a STOP
state. If there is potential for the device to be opened while the drive is running, the drive must be
programmed for COAST to stop (see Parameter 4 - STOP METHOD), and an auxiliary contact on the
device must be interlocked with the drive's run circuit. This will give the drive a stop command at the
same time the device opens, and will not allow the drive to start again until the device is closed.
WARNING!
Hazard of electrical shock! Capacitors retain charge after power is removed. Disconnect incoming
power and wait until the voltage between terminals B+ and B- is 0 VDC before servicing the drive.

14
THREE PHASE INPUT
(SF200, SF200Y, SF400,
AND SF500 SERIES)
3 PHASE
AC MOTOR
120 Vac SINGLE PHASE INPUT
(SF100 SERIES)
208/240 Vac SINGLE PHASE INPUT
(SF100 AND SF200Y SERIES)
DC BUS
VOLTAGE
*On SF200Y models, this terminal
is labeled L3.
OUTPUT (ALL SERIES)
L1 L2 N
L1 L2 L3
L1 L2 N*
T1 T2 T3 B- B+
+
NOTES:
1. WIRE AND GROUND IN ACCORDANCE WITH NEC OR CEC, AND ALL APPLICABLE
LOCAL CODES.
2. Motor wires MUST be run in a separate steel conduit away from control wiring and incoming AC
power wiring.
3. Do not install contactors between the drive and the motor without consulting AC Technology for
more information. Failure to do so may result in drive damage.
4. Use only UL and CSA listed and approved wire.
5. Minimum wire voltage ratings: 300 V for 120, 208 and 240 Vac systems, and 600 V for 400,
480, and 590 Vac systems.
6. Wire gauge must be based on a minimum of 125% of the rated input/output current of the drive,
and a minimum 75°C insulation rating. Use copper wire only.
7. Strip off 0.20 to 0.25 inches of insulation for input power, output power, and DC Bus wiring.
9.0 SCF POWER WIRING DIAGRAM
WARNING!
Do not connect incoming AC power to output terminals T1, T2, or T3. Severe damage to the drive
will result.

15
10.0 CONTROL WIRING
10.1 CONTROL WIRING VS. POWER WIRING
External control wiring MUST be run in a separate conduit away from all other input and output
power wiring. If control wiring is not kept separate from power wiring, electrical noise may be
generated on the control wiring that will cause erratic drive behavior. Use twisted wires or shielded
cable grounded at the drive chassis ONLY. Recommended control wire is Belden 8760 (2-wire) or
8770 (3-wire), or equivalent.
Strip off 0.20 to 0.25 inches of insulation for control wiring. Be careful not to overtorque the control
terminals, as this will cause damage to the terminal strip. This is not covered under warranty and can
only be repaired by replacing the control board.
10.2 TB-2: CIRCUIT COMMON
The TB-2 terminals are used as circuit common for the start/stop, forward/reverse, input select, local/
remote, analog input, and analog output functions. There are three TB-2 terminals available on the
terminal strip, and they are all internally connected to each other on the main control board. If
necessary TB-2 may be connected to chassis ground.
NOTE: TB-2 must be connected to chassis ground when using serial communications.
10.3 SURGE SUPPRESION ON RELAYS
Current and voltage surges and spikes in the coils of contactors, relays, solenoids, etc, near or connected
to the drive, can cause erratic drive operation. Therefore, a snubber circuit should be used on coils
associated with the drive. For AC coils, snubbers should consist of a resistor and a capacitor in series
across the coil. For DC coils, a free-wheeling or flyback diode should be placed across the coil.
Snubbers are typically available from the manufacturer of the device.
10.4 START/STOP CONTROL
There are various control schemes that allow for 2-wire and 3-wire Start/Stop circuits. Refer to the
wiring diagrams in Section 11.0 - SCF CONTROL WIRING DIAGRAMS
10.5 SPEED REFERENCE SIGNALS
The drive allows for three analog speed reference inputs:
SPEED POT Connect the wiper of a speed pot to terminal TB-5, and connect the high and
low end leads to terminals TB-6 and TB-2, respectively. The speed pot can be
2.5kΩup to 10kΩ.
0-10 VDC Wire the positive to terminal TB-5 and the negative to terminal TB-2. TB-5 input
impedance is 120 kilohms.
4-20 mA Wire the positive to terminal TB-25 and the negative to terminal TB-2. TB-25 input
impedance is 100 ohms.

16
10.6 SPEED REFERENCE SELECTION
If an analog speed reference input is used to control the drive speed, terminal TB-13A, 13B, or 13C
(Parameter 10, 11, or 12) may be programmed as the input select for the desired analog input signal.
When that TB-13 terminal is then closed to TB-2, the drive will follow the selected analog speed
reference input.
If an analog speed reference input is not selected on the terminal strip using TB-13A, 13B, or 13C,
speed control will default to STANDARD mode, which is governed by the setting of Parameter 05 -
STANDARD SPEED SOURCE. The STANDARD SPEED SOURCE can be the !and "buttons
on the front of the drive, PRESET SPEED #1 (Parameter 31), a 0-10 VDC signal, or a 4-20 mA
signal.
0 - 10 VDC and 4 - 20 mA INPUT SIGNALS
TB-13A, TB-13B, and TB-13C can all be programmed to select a 0-10 VDC or 4-20 mA analog
speed reference input.
PRESET SPEEDS
TB-13A can be programmed to select PRESET SPEED #1, TB-13B to select PRESET SPEED #2,
and TB-13C to select PRESET SPEED #3. There are a total of seven preset speeds, which are
activated by different combinations of contact closures between TB-13A, 13B, 13C and TB-2. Refer
to Parameters 31-37 in Section 15.0 - DESCRIPTION OF PARAMETERS.
JOG
TB-13B can be programmed to select either JOG FORWARD or JOG REVERSE. The Jog speed is
set by PRESET SPEED #2. Close TB-13B to TB-2 to JOG, and open the contact to STOP.
NOTE: If the drive is commanded to JOG while running, the drive will enter JOG mode and run at
PRESET SPEED #2. When the JOG command is removed, the drive will STOP.
MOTOR OPERATED POT (MOP) / FLOATING POINT CONTROL
TB-13B and TB-13C are used for this function, which controls the drive speed using contacts wired
to the terminal strip. Program TB-13B for DECREASE FREQ (05), and program TB-13C for
INCREASE FREQ (05). Closing TB-13B to TB-2 will cause the speed setpoint to decrease until the
contact is opened. Closing TB-13C to TB-2 will cause the speed setpoint to increase until the contact
is opened. The INCREASE FREQ function will only operate while the drive is running.
WARNING!
When operating in JOG mode, the STOP terminal (TB-1) and the STOP key (on the optional remote
keypad) WILL NOT stop the drive. To stop the drive, remove the JOG command.
JOG REVERSE will operate the drive in reverse rotation even if ROTATION DIRECTION (Parameter
17) is set to FORWARD ONLY.

17
NOTE: If TB-13A, TB-13B, and TB-13C are all programmed to select speed references, and two or
three of the terminals are closed to TB-2, the higher terminal has priority and will override the others.
For example, if TB-13A is programmed to select 0-10VDC, and TB-13C is programmed to select
PRESET SPEED #3, closing both terminals to TB-2 will cause the drive to respond to PRESET
SPEED #3, because TB-13C overrides TB-13A.
The exception to this is the MOP function, which requires the use of TB-13B and TB-13C. This
leaves TB-13A to be used for some other function. If TB-13A is programmed for a speed reference,
and TB-13A is closed to TB-2, TB-13A will override the MOP function.
10.7 ANALOG OUTPUT SIGNALS
Terminal TB-30 can provide a 0-10 VDC or a 2-10 VDC signal proportional to output frequency or
load, and TB-31 can provide the same signals proportional to load only. The 2-10 VDC signal can be
converted to a 4-20 mA signal using a resistor in series with the signal such that the total load
resistance is 500 Ohms. Refer to Parameters 08 and 09 in Section 15.0 - DESCRIPTION OF
PARAMETERS.
NOTE: These analog output signals cannot be used with “loop-powered” devices that derive power
from a 4-20 mA signal.
10.8 DRIVE STATUS DIGITAL OUTPUTS
There are two open-collector outputs at terminals TB-14 and TB-15. The open-collector circuits are
current-sinking types rated at 30 VDC and 50 mA maximum.
The open-collector outputs can be programmed to indicate any of the following: RUN, FAULT,
INVERSE FAULT, FAULT LOCKOUT, AT SPEED, ABOVE PRESET SPEED #3, CURRENT
LIMIT, AUTO SPEED MODE, and REVERSE. Refer to Parameters 06 and 13 in Section 15.0 -
DESCRIPTION OF PARAMETERS.
The diagram below illustrates how the 12 VDC power supply at TB-11 can be used with the open-
collector output to drive an external relay:
TB-11
TB-14
SCF TERMINAL STRIP
RELAY COIL
DIODE SNUBBER
(1N4148 or Equivalent)