AC Tech SCD Operation Manual

AC Tech

Variable Speed AC Motor Drives

SCN Series

Installation and Operation Manual

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THE SCN SUB-MICRO DRIVE

INPUT POWER TERMINALS

GROUND

LUG

ELECTRONIC

PROGRAMMING

2-DIGIT LED

MODULE (EPM)

DISPLAY

PROGRAMMING

BUTTONS

CONTROL

TERMINAL

STRIP

OUTPUT (MOTOR) TERMINALS

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1.0GENERAL

1.1PRODUCTS COVERED IN THIS MANUAL

This manual covers the AC Tech SCN Series Variable Frequency Drive.

1.2PRODUCT 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.

1.3WARRANTY

AC Technology Corporation warrants the SCN 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 SCN 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.

1.4RECEIVING

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.

1.5CUSTOMER 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.

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2.0SCN DIMENSIONS

0.38"

H

R

W

	0.38"
	0.18"
D	0.69"
P	0.19"
	Dia. Slot
	Mounting Tab Detail

	INPUT
HP	VOLTAGE	MODEL	H	W	D	P	R
0.25	120 / 208 / 240	SN103S	5.75	2.88	3.76	0.80	4.37
	208 / 240	SN203S	5.75	2.88	3.76	0.80	4.37
0.5	120 / 208 / 240	SN105S	5.75	2.88	3.76	0.80	4.37
	208 / 240	SN205S	5.75	2.88	3.76	0.80	4.37
	208 / 240	SN205	5.75	2.88	3.76	0.80	4.37
1	120 / 208 / 240	SN110S	5.75	3.76	5.24	1.90	4.37
	208 / 240	SN210S	5.75	2.88	4.56	1.60	4.37
	208 / 240	SN210	5.75	2.88	4.56	1.60	4.37
1.5	120 / 208 / 240	SN115S	5.75	3.76	5.24	1.90	4.37
	208 / 240	SN215S	5.75	3.76	5.24	1.90	4.37
	208 / 240	SN215	5.75	2.88	5.56	2.60	4.37
2	208 / 240	SN220S	5.75	3.76	5.24	1.90	4.37
	208 / 240	SN220	5.75	2.88	5.56	2.60	4.37
3	208 / 240	SN230S	5.75	3.76	6.74	3.40	4.37
	208 / 240	SN230	5.75	3.76	6.74	2.60	4.37

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3.0SCN MODEL DESIGNATION CODE

The SCN model number gives a full description of the basic drive unit (see example below).

EXAMPLE: SN210

(SCN Series, 208/240 Vac, 1 HP, 3 phase input)

SN 2 10

Series:

SN = SCN Series Variable Speed AC Motor Drive

Input Voltage:

1= 120/208/240 Vac (For 110 to 120 Vac and 208 to 240 Vac; 50 or 60 Hz)

2= 208/240 Vac (For 208, 220, 230, and 240 Vac; 50 or 60 Hz)

Horsepower:

03	= ¼ Hp	15	= 1½ Hp
05	= ½ Hp	20	=	2 Hp
10	= 1 Hp	30	=	3 Hp

Input: Phase

S= Single phase input only.

No character indicates three phase input only.

4.0SCN SPECIFICATIONS

Storage Temperature	-20 to 70 C
Ambient Operating Temperature	0 to 50 C (up to 6 kHz carrier, derate above 6 kHz)
Ambient Humidity	< 95% (non-condensing)
Altitude	3300 ft (1000 m) above sea level (without derating)
Input Line Voltages	120/208/240 Vac single phase, 208/240 Vac three phase
Input Voltage Tolerance	+10%, -15%
Input Frequency Tolerance	48 to 62 Hz
Output Wave Form	Sine Coded PWM
Output Frequency	0 - 99 Hz
Carrier Frequency	4 kHz to 10 kHz
Service Factor	1.00 (up to 6 kHz carrier, derate above 6 kHz)
Efficiency	Up to 98%
Power Factor (displacement)	0.96 or better
Overload Current Capacity	150% for 60 seconds, 180% for 30 seconds
Speed Reference Follower	Speed Potentiometer, 0-10 VDC (must be isolated)1
Power Supply for Auxiliary Relay	50 mA at 12 VDC
Digital Output	Circuit rated 50 mA and 30 VDC max (to drive auxiliary relay)1

1 WARNING: Control terminals are not isolated from line voltage! Do not touch!

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5.0SCN RATINGS

MODEL	FOR MOTORS			INPUT (50-60 Hz)				OUTPUT	HEAT LOSS
	RATED
NUMBER			INPUT	CURRENT			POWER	CURRENT	(WATTS)
(NOTE 1)	HP	kW	PHASE	(AMPS)			(kVA)	(AMPS)	(NOTE 4)
SN100 SERIES (NOTE 2)				120 / 208 / 240 Vac				0 - 230 / 200 / 230 Vac
SN103S	0.25	0.2	1	6.0 / 3.5 / 3.0			0.72	1.4 / 1.6 / 1.4	21
SN105S	0.5	0.37	1	9.2 / 5.3 / 4.6			1.1	2.2 / 2.5 / 2.2	28
SN110S	1	0.75	1	16.6 / 9.6 / 8.3			2.0	4.2 / 4.8 / 4.2	48
SN115S	1.5	1.1	1	24 / 13.9 / 12.0			2.9	6.0 / 6.9 / 6.0	73
SN200S SERIES (NOTE 3)				208 / 240 Vac				0 - 200 / 230 Vac
SN203S	0.25	0.20	1	3.6	/ 3.2		0.76	1.6 / 1.4	19
SN205S	0.5	0.37	1	5.4	/ 4.7		1.2	2.5 / 2.2	26
SN210S	1	0.75	1	10.6 / 9.2			2.2	4.8 / 4.2	49
SN215S	1.5	1.1	1	13.9	/ 12.0		2.9	6.9 / 6.0	82
SN220S	2	1.5	1	14.8	/ 12.9		3.2	7.8 / 6.8	86
SN230S	3	2.2	1	19.7	/ 17.1		4.1	11.0 / 9.6	130
SN200 SERIES (NOTE 3)				208 / 240 Vac				0 - 200 / 230 Vac
SN205	0.5	0.37	3	3.1	/ 2.7		1.1	2.5 / 2.2	24
SN210	1	0.75	3	5.8	/ 5.1		2.1	4.8 / 4.2	41
SN215	1.5	1.1	3	8.0	/ 6.9		2.9	6.9 / 6.0	69
SN220	2	1.5	3	9.1	/ 7.9		3.3	7.8 / 6.8	78
SN230	3	2.2	3	12.4	/ 10.8		4.5	11.0 / 9.6	117

NOTE 1: See Section 3.0 for model number breakdown.

NOTE 2: The first current ratings listed are for 120 Vac input, the second current ratings are for 208 Vac input, and the third current ratings are for 240 Vac input. 120 Vac input yields three phase 230 Vac output.

NOTE 3: The higher current ratings are for 208 Vac input and the lower current ratings are for 240 Vac input. NOTE 4: Values are worst-case (not typical) for 6kHz carrier frequency at full speed and full load.

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6.0INSTALLATION

NOTE!

SCN drives are intended for inclusion within other equipment, by professional electrical installers. They are not intended for stand-alone operation.

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.

WARNING!

Hazard of electrical shock! The SCN control terminals are not isolated from line voltage! Line voltage is present between the control terminals and ground. Do not touch!

Disconnect input power and wait three minutes before making connections to the control terminals.

Devices (such as switches, pushbuttons, potentiometers, relays, etc) and wiring connected to the control terminals are hot to ground and must have an insulation rating of at least 240 Vac or a dielectric rating of at least 1500 volts to prevent damage to equipment and/or injury to personnel.

SCN 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 one inch on each side and two 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 column in Section 5.0 - SCN RATINGS. 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 SCN Series is UL approved for solid state motor overload protection. Therefore, a separate thermal overload relay is not required for single motor applications.

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6.1INSTALLATION AFTER A LONG PERIOD OF STORAGE

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!

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.

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.

6.2EXPLOSION 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 particular purpose or warranty of suitability for use with explosion proof motors. AC Technology 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. AC Technology Corporation or AC Technology Corporation’s engineering department will not knowingly approve applications involving explosion proof motors.”

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7.0INPUT AC POWER REQUIREMENTS

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.

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 the drive’s rated voltage.

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.

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.

7.1INPUT VOLTAGE RATINGS

SN100 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.

SN200S Series drives are rated for 208/240 Vac, single phase, 50-60 Hz input. The drive will function with input voltages of 208 to 240 Vac (+10%, -15%), at 48 to 62 Hz.

SN200 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.

NOTE: Parameter 01 - LINE VOLTAGE SELECTION must be programmed according to the applied input voltage. See Section 15.0 - DESCRIPTION OF PARAMETERS.

7.2INPUT 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 SCN 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 fuse size should be 10 amps, regardless of input current rating). Refer to Section 5.0 - SCN RATINGS.

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Minimum voltage rating of the protection device should be 250 Vac for 120/208/240 Vac and 208/240 Vac rated drives.

UL Class CC fast-acting, current limiting type fuses should be used when input fusing is required. Select fuses with low I 2 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.

8.0POWER WIRING

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.

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.

8.1WIRING FOR SINGLE PHASE OR THREE PHASE INPUT

If the drive is rated for 120/208/240 Vac single phase input (SN100S models), 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 - SCN POWER WIRING DIAGRAM.

If the drive is rated for 208/240 Vac single phase input (SN200S models), wire the input to terminals L1 and L2.

If the drive is rated for three phase input (SN200 models), 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.

Do not install contactors between the drive and motor without consulting AC Technology Corporation for more information. 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.

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9.0SCN POWER WIRING DIAGRAM

THREE PHASE INPUT	120 Vac SINGLE PHASE INPUT
(SN200 SERIES)	(SN100 SERIES)

L1

L2

L3

L1

L2

N

208/240 Vac SINGLE PHASE INPUT	OUTPUT (ALL SERIES)
(SN100 AND SN200S SERIES)
	T1 T2 T3 B- B+
L1 L2 L3*
*On SN100 models, this terminal		+
is labeled N.
	3 PHASE	DC BUS
	AC MOTOR	VOLTAGE

WARNING!

Do not connect incoming AC power to output terminals T1, T2, or T3. Severe damage to the drive will result.

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.

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.

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10.0CONTROL WIRING

WARNING!

Hazard of electrical shock! The SCN control terminals are not isolated from line voltage! Line voltage is present between the control terminals and ground. Do not touch!

Disconnect input power and wait three minutes before making connections to the control terminals.

Devices (such as switches, pushbuttons, potentiometers, relays, etc) and wiring connected to the control terminals are hot to ground and must have an insulation rating of at least 240 Vac or a dielectric rating of at least 1500 volts to prevent damage to equipment and/or injury to personnel.

10.1CONTROL 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 rated for 300 VDC minimum (do not ground the shield).

10.2SURGE SUPPRESION ON RELAYS

Current and voltage surges and spikes in the coils of contactors, relays, and solenoids, near or connected to the drive, can cause erratic drive operation. Snubbers should be used on any coils associated with the drive. For AC loads, snubbers should consist of a resistor and a capacitor in series across the coil. For DC loads, a free-wheeling or flyback diode should be placed across the coil.

10.3START/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 - SCN CONTROL WIRING DIAGRAMS.

10.4SPEED REFERENCE SIGNALS

SPEED POT	Connect the wiper to terminal TB-5, and connect the high and low end leads to
	terminals TB-6 and TB-3, respectively. The speed pot can be 5kΩ up to 10kΩ .
0-10 VDC	Wire the positive to terminal TB-5 and the negative to terminal TB-3. The 0-10
	VDC signal must be isolated, as the control terminals are at line voltage potential.

DO NOT connect the low side of the speed pot or 0-10 VDC signal to ground.

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10.5SPEED REFERENCE SELECTION

If a speed pot is to be 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 speed pot. When that TB-13 terminal is then closed to TB-11, the drive will follow the speed pot input.

If the speed pot 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), or a speed pot.

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-11. 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-11 to JOG, and open the contact to STOP.

WARNING!

When operating in JOG mode, the STOP signal and the AUXILIARY STOP function (see Parameters 10-12) 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.

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 required for this function, which controls the drive speed using normally open contacts wired to the terminal strip. Program TB-13B for DECREASE FREQ, and program TB13C for INCREASE FREQ. Closing the contacts between the TB-13 terminals and TB-11 will cause the speed setpoint to increase or decrease until the contact is opened. The INCREASE FREQ function will only operate while the drive is running.

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-11, the higher terminal has priority and will override the others. For example, if TB-13A is programmed to select a speed pot, and TB-13C is programmed to select PRESET SPEED #3, closing both terminals to TB-11 will cause the drive to respond to PRESET SPEED #3, because TB-13C overrides TB-13A.

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10.7DRIVE STATUS DIGITAL OUTPUTS

There is one open-collector output at terminal TB-14. The open-collector circuit is a current-sinking type rated at 30 VDC and 50 mA maximum.

The open-collector output can be programmed to indicate any one of the following: RUN, FAULT, INVERSE FAULT, FAULT LOCKOUT, AT SPEED, ABOVE PRESET SPEED #3, CURRENT LIMIT, AUTO SPEED MODE, and REVERSE. Refer to Parameter 06 in Section 15.0 - DESCRIPTION OF PARAMETERS.

		DIODE SNUBBER
	STRIP	(RECOMMENDED)
		TB-11
	TERMINAL
		RELAY COIL
	SCN	TB-14
		WARNING!

Hazard of electrical shock! The SCN control terminals are not isolated from line voltage! Line voltage is present between the control terminals and ground. Do not touch!

Only use relays with an insulation rating of at least 240 Vac or a dielectric rating of at least 1500 volts to prevent damage to equipment and/or injury to personnel.

NOTE: When the optional remote keypad is used, TB-14 is wired to the remote keypad and cannot be used for status indication.

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