Oriental motor MSC-1 User manual

Table of contents
HP-5051-7
Speed Controller
MSC-1
OPERATING MANUAL
Thank you for purchasing an Oriental Motor product.
This Manual describes product handling procedures and safety precautions.
•Please read it thoroughly to ensure safe operation.
•Always keep the manual where it is readily available.
1 Introduction...............................2
2 Safety precautions....................4
3 Precautions for use ..................5
4 Installation................................6
4.1 Location for installation .................6
4.2 Installation method........................6
4.3 Installing an external
potentiometer (Sold separately)....7
4.4 Installing and wiring in compliance
with EMC Directive........................7
5 Connection...............................9
5.1 Connection example .....................9
5.2 I/O signals...................................12
6 Basic operations.....................13
6.1 Run/stop......................................13
6.2 Setting the operating speed........13
6.3 Setting the acceleration time and
deceleration time.........................14
6.4 2-speed operation.......................14
6.5 Timing chart.................................15
6.6 Multi-motor control ......................15
6.7 Repeated cycle of operation/
instantaneous stop......................16
6.8 Braking current at instantaneous
stop .............................................16
7 Alarms....................................17
8 Inspection...............................18
9 Troubleshooting and remedial
actions....................................19

−2−
Introduction
1 Introduction
 Before use
Only qualied personnel of electrical and mechanical engineering should work with the product.
Use the product correctly after thoroughly reading the section "2 Safety precautions." In addition, be
sure to observe the contents described in warning, caution, and note in this manual. Do not use for any
other purpose. Oriental Motor Co., Ltd. is not responsible for any damage caused through failure to
observe this warning.
 Overview of the MSC-1
The MSC-1 is a speed controller for velocity adjustment of AC speed control motors.
 Applicable motors
AC speed control motor (6 to 90 W)
Also read the OPERATING MANUAL for applicable motor.
 Standard and CE Marking
The MSC-1 is recognized by UL, and axed the CE Marking (Low Voltage Directive and EMC
Directive) under the EN Standards.
•Applicable Standards
Applicable Standards Cettication Body Standards File No. CE Marking
UL 508 UL E91291 −
EN 50178 Conform to EN standards Low Voltage Directive
EMC Directive
•Installation conditions (EN Standard)
For use as a component within another device Overvoltage category: II
Protection against electric shock: Class II Pollution degree: 2
*If your equipment requires conformance to overvoltage category III, supply the power via an insulated
transformer.
*If your equipment requires conformance to pollution degree 3, store the speed controller in an IP54-compliant
enclosure.
•Low Voltage Directives
This product is designed and manufactured to be incorporated in equipment.
•EMC Directives
Refer to "4.4 Installing and wiring in compliance with EMC Directive" on p.7.
 RoHS Directive
The products do not contain the substances exceeding the restriction values of RoHS Directive (2011/65/EU).
 Checking the product
Verify that the items listed below are included. Report any missing or damaged items to the branch or
sales oce from which you purchased the product.
• Speed controller ................................................1 unit
• CN1 connector ..................................................1 pc.
• Instructions and Precautions for Safe Use ........1 copy

−3−
Introduction
 Names and functions of parts
POWER LED (Green)
Main circuit terminal (TB1)
ALARM LED (Red)
Internal potentiometer (VR1)
Acceleration time potentiometer (VR2)
Deceleration time potentiometer (VR3)
Control circuit terminal (CN1)
DIN lever
Not used (SW1-2)
Speed command voltage select switch
(SW1-1)
Name Description
POWER LED (Green) This LED lit while the AC power is input.
ALARM LED (Red) This LED will blink when an alarm generates. TheALARM output will become
OFF (H level). (P.17)
Internal potentiometer
(VR1) Sets the operating speed of the motor. (P.13)
Acceleration time
potentiometer (VR2) Sets the acceleration time for the motor. (P.14)
Deceleration time
potentiometer (VR3) Sets the deceleration time for the motor. (P.14)
Speed command voltage
select switch (SW1-1) If external DC voltage is to be used to set the operating speed, set this switch according to the applicable external DC voltage. Select 5 V or 10 V. (P.13)
Control circuit terminal
(CN1) Connects the control DC power supply (24 V) and I/O signals. (P.9)
Main circuit terminal (TB1) Connects the AC power supply, motor, rate generator and capacitor. (P.9)
DIN lever Mounts the speed controller to a DIN rail. (P.6)

−4−
Safety precautions
2 Safety precautions
The precautions described below are intended to prevent danger or injury to the user and other
personnel through safe, correct use of the product. Use the product only after carefully reading and fully
understanding these instructions.
Handling the product without observing the instructions that accompany a
"WARNING" symbol may result in serious injury or death.
Handling the product without observing the instructions that accompany a
"CAUTION" symbol may result in injury or property damage.
Note
The items under this heading contain important handling instructions that the
user should observe to ensure safe use of the product.
Description of graphic symbols
Indicates "prohibited" actions that must not
be performed. Indicates "compulsory" actions that must be performed.
Do not use the product in explosive or corrosive environments, in the presence of ammable gases,
in places subjected to splashing water, or near combustibles. Doing so may result in re, electric
shock or injury.
Do not transport, install the product, perform connections or inspections when the power is on.
Always turn o󰀨 the power before carrying out these operations. Accidental contact may result in
electric shock.
Do not forcibly bend, pull or pinch the cable. Doing so may cause re or electric shock.
Do not touch the main circuit terminal of the speed controller immediately after the power is turned
o󰀨 (for a period of 1 minute). The residual voltage may cause electric shock.
Do not disassemble or modify the speed controller. Doing so may result in electric shock or injury.
Only qualied and educated personnel should be allowed to perform installation, connection,
operation and inspection/troubleshooting of the product. Handling by unqualied and uneducated
personnel may result in re, electric shock or injury.
Install the motor and speed controller in the enclosure in order to prevent electric shock or injury.
Use the speed controller which power supply voltage is the same as that of the motor. Failure to do
so may result in re or damage to equipment.
The speed controller has no built-in fuse for overcurrent protection. Be sure to connect a device for
overcurrent protection (e.g. fuse) in the power input line. Failure to do so may result in re.
Connect the cables securely according to the wiring diagram in order to prevent re or electric
shock.
Be sure to observe the specied cable sizes. Use of unspecied cable sizes may result in re.
Turn o󰀨 the speed controller power in the event of a power failure. Or the motor may suddenly start
when the power is restored and may cause injury or damage to equipment.

−5−
Precautions for use
Do not use the speed controller beyond its specications. Doing so may result in electric shock,
injury or damage to equipment.
Do not use the product in vertical drive (elevating application). Doing so may result in injury or
damage to equipment.
Keep the area around the speed controller free of combustible materials. Failure to do so may
result in re or a skin burn(s).
Do not wire the electromagnetic contactor or power relay between the motor and speed controller.
To switch the rotation direction using the electromagnetic contactor may cause damage to
equipment.
Do not conduct insulation resistance measurement or dielectric strength test on the speed
controller. Failure not to do so may result in injury or damage to equipment.
If an alarm of the speed controller is generated, remove the cause before resetting the alarm.
Failure to do so may result in injury or damage to equipment.
Use this speed controller in combination with an Oriental Motor's speed control motor equipped
with an overheat protection device. Failure to do so may result in re.
Provide an emergency-stop device or emergency-stop circuit external to the equipment so that the
entire equipment will operate safely in the event of a system failure or malfunction. Failure to do so
may result in injury.
If abnormal conditions occurred, stop the operation immediately and turn o󰀨 the speed controller
power. Failure to do so may result in re, electric shock or injury.
Dispose the product correctly in accordance with laws and regulations, or instructions of local
governments.
3 Precautions for use
WARNING FOR USE ON SPEED CONTROLLER (UL-certied)
• Maximum surrounding air temperature 50 °C (122 °F).
• DC voltage source shall be of Class 2 type.
• Install device in pollution degree 2 environment.
• Always use this speed controller in combination with a compatible motor by Oriental Motor. The
compatible motors listed in this manual are recognized by UL and provide an overheat protection
function based on thermal protection or impedance protection.
• Connect the cables securely according to the wiring diagram.

−6−
Installation
4 Installation
This chapter explains the installation location, installation methods and measures against noise of the
speed controller.
4.1 Location for installation
The speed controller is designed and manufactured to be installed within another device. Install it in
a well-ventilated location that provides easy access for inspection. The location must also satisfy the
following conditions:
• Inside an enclosure that is installed indoors
• Operating ambient temperature 0 to +50 °C
[+32 to 122 °F] (non-freezing)
• Operating ambient humidity 85% or less
(non-condensing)
• Area that is free of explosive atmosphere or
toxic gas (such as sulfuric gas) or liquid
• Area not stored combustible materials
• Area not exposed to direct sun
• Area free of excessive amount of dust, iron
particles or the like
• Area not subject to splashing water (rain, water
droplets), oil (oil droplets) or other liquids
• Area free of excessive salt
• Area not subject to continuous vibration or
excessive shocks
• Area free of excessive electromagnetic noise
(from welders, power machinery, etc.)
• Area free of radioactive materials, magnetic elds
or vacuum
• Altitude Up to 1000 m (3300 ft.) above sea level
Note If the ambient temperature of the speed controller exceeds the upper limit of the operating
ambient temperature, revise the ventilation condition or forcibly cool the area around the
speed controller using a fan in order to keep within the operating ambient temperature.
4.2 Installation method
Use a DIN rail 35 mm (1.38 in.) wide to mount the speed controller.
The speed controller is designed so that heat is dissipated via air convection. Provide spaces so that the
speed controller can be ventilated well through its top and bottom vent holes.
Push down the speed controller's DIN lever until it locks. Hang the hook at the rear to the DIN rail, and
push in the speed controller. After installation, x the both sides of the speed controller with the end
plate.
Hook
DIN rail
DIN lever
End plate
Removing from DIN rail
Pull the DIN lever down until it locks using a at tip screwdriver, and lift the
bottom of the speed controller to remove it from the rail.
Use force of about 10 to 20 N (2.2 to 4.5 lb.) to pull the DIN lever to lock it.
Excessive force may damage the DIN lever.

−7−
Installation
4.3 Installing an external potentiometer (Sold separately)
Install an accessory external potentiometer (sold separately) as shown below.
Nut
Tightening torque:
0.45 N·m (3.9 lb-in)
Setscrew (M4)
Tightening torque:
0.4 N·m (3.5 lb-in)
•Reference mounting hole
dimensions [Unit: mm (in.)]
Ø3 (0.12)
7.5±0.4 (0.3±0.02)
Ø10 (0.39)
Dial
Toothed washer
Dial plate
Mounting plate
Insulation sheet
Variable resistor
Soldering the variable resister terminals and the lead wires
Cover a heat-shrinkable tube over the soldered part to insulate.
235 °C (455 °F), less than 5 sec.
Lead wire
Lead wire
Terminal Heat-shrinkable tube
Dial
Va
riable resistor
Solder (Pass the lead wire
through the terminal hole and
give it two or three turns.)
4.4 Installing and wiring in compliance with EMC Directive
 EMC Directives
The speed controller is designed and manufactured as a component to be installed within another device.
The EMC Directives require that your mechanical equipment in which the speed controller is installed
satisfy the applicable requirements. The installation/wiring methods of the speed controller explained
here represent the basic methods that are eective in helping your mechanical equipment conform to the
EMC Directives. The nal level of conformance of your mechanical equipment to the EMC Directives
will vary depending on the control system equipment used with the speed controller, conguration of
electrical parts, wiring, layout, hazard level, and the like. Therefore, you must conduct the EMC tests on
your mechanical equipment to conrm compliance.
 Applicable Standards
EMI EN 55011 Group 1 Class A
EN 61000-6-4
EMS EN 61000-6-2
Caution: This equipment is not intended for use in residential environments nor for use on a low-voltage
public network supplied in residential premises, and it may not provide adequate protection to
radio reception interference in such environments.
Eective measures must be taken against the EMI that the speed controller may give to adjacent
control-system equipment, as well as the EMS of the speed controller itself, in order to prevent a serious
functional impediment in the machinery. The use of the following installation and wiring methods will
enable the speed controller to be compliant with the EMC Directive.

−8−
Installation
 Connecting mains lter for power supply line
• Connect a mains lter in the AC power supply input to prevent the noise generated in the speed
controller from propagating externally through the power supply line. For a mains lter, use MC1210
(TDK-Lambda Corporation) or equivalent product.
• Install the mains lter as close to the speed controller as possible. Use cable clamps and other means
to secure the input cables and output cables rmly to the surface of the enclosure. Connect the ground
terminal of the mains lter to the grounding point, using as thick and short a wire as possible.
• Do not place the input cable parallel with the output cable. Parallel placement will reduce mains lter
eectiveness if the enclosure's internal noise is directly coupled to the power supply cable by means of
stray capacitance.
 Connecting motor cable
When the motor cable is extended, use a cable of AWG18 (0.75 mm2) or more with a length of 10 m
(32.8 ft.) or less. When extending the rate generator lead wires, use a shielded cable.
 Ferrite core
Install a ferrite core in the power line and motor cable line to eliminate external electrical noise.
Use a ferrite core of 7427122 (Würth Elektronik GmbH & Co. KG), ZCAT3035-1330 (TDK
Corporation) or equivalent.
Install the ferrite core as close to the speed controller as possible.
 Wiring the control cable
Use a braided shielded cable of AWG24 (0.2 mm2) or more
for control cable, and keep the wiring distance as short as
possible [less than 2 m (6.6 ft.)].
Recommended strip length for braided
shielded cable
4 mm (0.16 in.) or more
Wire
Insulation Braided shield
Sheath
To ground a shielded cable, use a metal that will maintain
contact with the entire circumference of the cable. Attach a
cable clamp as close to the end of the cable as possible, and
connect it as shown in the gure.
Cable clamp
Shielded cable
 Notes about installation and wiring
• Connect the motor, speed controller and other peripheral control equipment directly to the grounding
point so as to prevent a potential dierence from developing between grounds.
• When relays or electromagnetic switches are used together with the system, use mains lters and CR
circuits to suppress surges generated by them.
• Keep cables as short as possible without coiling and bundling extra lengths.
• Wire the power cables away from the control cables by providing a minimum clearance of 100 mm (3.94
in.) between them. If they have to cross, cross them at a right angle. Place the input cable and output
cable of a mains lter separately from each other.

−9−
Connection
 Example of motor and speed controller installation and wiring
Motor
Speed controller
Motor cable
[10 m (32.8 ft.)]
Power supply
cable
Cable
clamp
Cable
clamp
Mains
filter
Capacitor
Grounded plate
Control cable
[2 m (6.6 ft.)]
Ferrite
core
Ferrite
core
5 Connection
This chapter explains how to connect the speed controller and power supply, motor and I/O signals.
5.1 Connection example
The following gure is an example when connecting the motor of World K Series, and the motor is
operated with relays, switches and other contact switches. To operate the motor, be sure to connect
control DC power supply.
A 60 W type motor or larger is equipped with a built-in cooling fan. Connect two lead wires (orange
color) of the cooling fan to the AC power supply connection terminals (pin no. 8 and 9 of the TB1).
3 COM
2 0 V
1 +24 V
TB1
CN1
Motor
Blue 1
Blue 2
White 3
Red 4
Black 5
6
7
L (Live) 8
N (Neutral) 9
Speed controller
Power
supply
Control DC power supply
Capacitor 4 FWD input
5 REV input
6 INT/EXT input
7 ALARM-RESET input
11 SPEED-OUT output
12 ALARM-OUT output
24 VDC±10%
100 mA or more

−10−
Connection
 Connecting the main circuit terminal (TB1)
• Applicable cable size: AWG18 (0.75 mm2) or more*
*AWG20 to 14 (0.5 to 2.0 mm2) for capacitor connection
• Terminal block screw size: M3
• Tightening torque: 0.8 N·m (7.0 lb-in)
Applicable crimp terminal
6.2 (0.24)
or less
Ø3.2 (Ø0.13) or more
Unit [mm (in.)]
•TB1 pin assignments
Pin No. Terminal name Pin No. Terminal name
1Rate generator connection terminals 6Capacitor connection terminals
2 7
3Motor connection terminals 8AC power supply connection terminals
4 9
5
 Connecting the control circuit terminal (CN1)
• Applicable cable size: AWG24 to 16 (0.2 to 1.25 mm2)
• Lead wire strip length eled: 7 mm (0.28 in.)
• Terminal block screw size: M2
• Tightening torque: 0.33 N·m (2.9 lb-in)
• The length of the cable should be less than 2 m (6.6 ft.) and wire the cable away from the power lines.
• Use a shielded cable or twisted pair shielded cable when setting the rotation speed externally.
•CN1 pin assignments
Pin No. Signal type Signal name Description
1Control power
supply +24 V Connect the 24 VDC for control circuit.
2 0 V (GND)
3 Common COM (GND) I/O signals common
4
Input
FWD The motor turns in the clockwise direction.
5 REV The motor turns in the counterclockwise direction.
6 INT/EXT Select the internal potentiometer or external potentiometer
(external DC voltage).
7 ALARM-RESET Alarms are reset.
8 VH Connect when setting the speed externally.9 VM
10 VL (GND)
11 Output SPEED-OUT 12 pulses are output with each revolution of the motor
output shaft.
12 ALARM-OUT This signal is output when an alarm generates
(normally closed).
 Connecting the fuse
Be sure to connect a fuse or similar device in the power line to protect against overcurrent.
Fuse rating Single-phase 100/110/115 V 216 Series (Littelfuse,Inc.) 10 Aor equivalent
Single-phase 200/220/230 V 216 Series (Littelfuse,Inc.) 6.3 Aor equivalent
Note Use the speed controller which power supply voltage is the same as that of the motor.

−11−
Connection
 Connection diagram
The connection diagram shown here is an example that the operating speed is set using an external
speed potentiometer.
Speed controller
Main circuit TB1
Control circuit CN1
Motor
Capacitor
Rate
generator
Control DC power supply
Power supply
Setting the operating
speed
Input signals
∗1
External
potentiometer
(sold separately)
Circuit breaker
Fuse
Speed command voltage
Input circuit Output
circuit
Enclosure
Shielded wire
24 VDC±10%
100 mA
or more
30 VDC
or less
100-115 VAC
or
200-230 VAC
1
2
9
10
+24 V
4.7 kΩ
+24 V
0 V
VM
VL
FWD
REV
INT/EXT
COM
VH
ALARM-RESET
0 V
0 V 0 V
0 V
4
5
6
7
3
11
12
SPEED-OUT
ALARM-OUT
COM
3
8
8
9L
N
1
2
3
4
5
Blue
Blue
White
Red
Black
6
7
∗2
∗2
*1 For relays or transistors connecting to the input signals, use those of leakage current 1 mA or less.
*2 Connect external resistors so that the SPEED-OUT output and ALARM-OUT output are kept below 10 mA
and 40 mA respectively.

−12−
Connection
5.2 I/O signals
 Input signals
The speed controller input signals are photocoupler inputs.
 Output signals
The speed controller output signals are transistor/open-collector output. Connect the current-limiting
resistor to keep the SPEED-OUT output and ALARM-OUT output at maximum 10 mA and 40 mA,
respectively.
•Recommended current-limiting resistor
Input power supply voltage For SPEED-OUT output For ALARM-OUT output
24 VDC 3.3 kΩto 3.9 kΩ(2 W) 820 Ωto 3.9 kΩ(2 W)
5 VDC 680 Ωto 820 Ω(0.5 W) 150 Ωto 820 Ω(0.5 W)
Note
•Always connect a current-limiting resistor. If the power supply voltage is connected to
the output circuit directly without connecting a current-limiting resistor in between, the
speed controller will be damaged.
•When connecting a relay (inductive load), etc., to detect
alarm outputs, use a relay with built-in ywheel diode,
or provide a y-back voltage control measure based on
diode, etc., for the inductive load. ALARM
-OUT
Inductive load
Flywheel
diode
•SPEED-OUT output
12 pulses are output with each revolution of the motor output shaft synchronously with the motor
operation (pulse duty: approx. 50%). The motor operating speed can be calculated by checking the
SPEED-OUT output frequency.
T
SPEED-OUT
output frequency = 1
T
Motor operating speed [r/min] =×
60
SPEED-OUT output frequency [Hz]
12
1
Gear ratio
When a gearhead is used: Motor operating speed
×
 Using a external control equipment with a built-in clamp diode
If a external control equipment with a built-in clamp
diode is used, a leakage path may form and cause
the motor to operate even when the external control
equipment power is o, as long as the speed controller
power is on. Since the power capacity of the external
control equipment is dierent from that of the speed
controller, the motor may operate when the external
control equipment and speed controller powers are
turned on or o simultaneously. When powering down,
turn o the speed controller power rst, followed by
External control
equipment
Speed controller CN1
4 to 7
3
VCC +24 V
0 V
0 V
Clamp
diode
the external control equipment power. When powering up, turn on the external control equipment power
rst, followed by the speed controller power.

−13−
Basic operations
6 Basic operations
This chapter explains the basic operations of the speed controller.
6.1 Run/stop
When turning the FWD input or REV input ON, the motor will rotate at the set speed.
When turning the FWD input or REV input OFF while the motor operates, the motor will coast to a
stop.
When turning the FWD input and REV input ON simultaneously, the motor will stop instantaneously.
Note Do not operate the motor in vertical drive (gravitational operation).
6.2 Setting the operating speed
The setting range is from 90 to 1400 r/min at 50 Hz or 90 to 1600 r/min at 60 Hz.
There are three methods to set the operating speed; internal potentiometer, external potentiometer and
external DC voltage.
 Setting by internal potentiometer
Use a precision screwdriver to turn the internal
potentiometer (VR1). Turn the potentiometer
clockwise to increase the speed.
Factory setting: 0 r/min
Internal potentiometer
(VR1)
 Setting by external potentiometer (sold separately)
When the speed is set away from the speed controller,
connect the external potentiometer (sold separately)
to CN1. When the INT/EXT input is turned ON, the
external potentiometer is enabled.
Turn the potentiometer clockwise to increase the
speed. 9 VM input
8 VH input
High
Low
123
10 VL input
External potentiometer
 Setting with external DC voltage
Set either 5 or 10 VDC for the external DC voltage.
Select the speed command voltage select switch
(SW1-1) to set which voltage to be used. 5 VDC is
set when the switch is set to the OFF position, and
10 VDC is set when the switch is set to the ON
position.
Factory setting: 5 VDC (OFF)
For the external voltage, use a DC power supply
(0 to 5 VDC or 0 to 10 VDC) with reinforced
insulation on both the primary side and secondary
side, and connect it to the CN1.
Speed command voltage
select switch (SW1-1)
OFF: 5 VDC
ON: 10 VDC
0 to 5 VDC
or
0 to 10 VDC
1 mA or more
External DC voltage
10 VL input
9 VM input
Note Be sure to set the external DC voltage to either 5 VDC or less, or 10 VDC or less. When
connecting the external DC power supply, make sure the polarities are correct. If the
polarities are reversed, the speed controller may be damaged.

−14−
Basic operations
 Operating speed characteristics (representative values)
500
1000
1500
1800
0246810
Dial
Operation speed [r/min]
500
1000
1500
1800
Operation speed [r/min]
500
1000
1500
1800
Operation speed [r/min]
60 Hz
50 Hz
Internal potentiometer External potentiometer External DC voltage
020406080 100
Dial 0
12345
0246
810
DC voltage [V]
6.3 Setting the acceleration time and deceleration time
The acceleration/deceleration time can be adjusted to prevent the load from receiving a shock upon
starting, stopping or a change in speed.
The acceleration time and deceleration time are eective for all speed settings.
The setting range is approx. 0.3 to 15 seconds (at 1000 r/min, with no inertial load).
•Acceleration time (Factory setting: Min.)
The acceleration time is actuated at start or when the speed is switched to the higher setting in a 2-speed
operation. Turning the acceleration time potentiometer (VR2) clockwise increases the time.
•Deceleration time (Factory setting: Min.)
The deceleration time is actuated at natural stop or when the speed is switched to the lower setting in a
2-speed operation. Turning the deceleration time potentiometer (VR3) clockwise increases the time.
 Characteristics (representative values)
Max.
Dial
Acceleration time [s/1000 r/min]
02468
5
10
15
Deceleration time [s/1000 r/min]
5
10
15
Setting the acceleration time Setting the deceleration time
Max.
Dial
02468
*However, when the load inertia is large, the deceleration time cannot be set at a shorter time than how long it
takes for the motor to coast to a stop.
6.4 2-speed operation
Operation can be performed at two speeds through use of both the internal potentiometer and external
potentiometer (external DC voltage) by switching the INT/EXT input. For details, refer to following
timing chart.

−15−
Basic operations
6.5 Timing chart
The chart below is an example of setting the internal potentiometer to 1200 r/min and external
potentiometer to 100 r/min and switching the speed between these two levels.
ON
OFF
ON
OFF
ON
OFF
REV input
FWD input
INT/EXT
input
Motor operation
CW direction
Run/
Instantaneous stop
Decelerate
instantaneously
10 ms or more
CCW direction
1200 r/min
Rotation direction change/
Instantaneous reverse
Run/Speed change/
Stop
100 r/min
Accelerate at
the set time
Note
•Make sure each signal remains ON for at least 10 ms.
•When switching the FWD input and REV input, provide an interval of at least 10 ms.
•If the power supply is turned on while the FWD input or REV input is being ON, the
motor will rotate. Turn on the power supply after turning the FWD input and REV input
OFF, so that the motor will not rotate suddenly when the power is turned on.
•To change rotation direction of the induction motor, wait until the motor completely
stops.
6.6 Multi-motor control
Two or more motors can be operated at the same speed by using a single external potentiometer
(external DC voltage).
 Using an external potentiometer
Connect the speed controller as shown below. When performing multi-motor control using the external
potentiometer, the number of speed controllers should not exceed 20 units.
• Connect the external I/O signals to each speed controller.
• If the speed will vary among the respective motors, make adjustments as follows;
Speed controller 1: Connect a resistor of 1.5 kΩ, 1/4 W to VM terminal
Speed controller 2 and subsequent speed controllers: Connect a variable resistor VRn of 5 kΩ, 1/4 W
1.5 kΩ
1/4 W
31
2
VRx
Control line
Speed controller 1 Speed controller n
VM
VL
L
N
VH
TB1 CN1
VM
VL
L
N
VH
TB1 CN1
Power supply line
VRn
5 kΩ1/4 W

−16−
Basic operations
Resistance (VRx) when the number of speed controllers is n:
Resistance (VRx) = 20/n (kΩ), n/4 (W)
Example: If two speed controllers are used
Resistance (VRx) = 20/2 (kΩ), 2/4 (W), resistance (VRx) is calculated as 10 kΩ, 1/2 W.
 Using external DC voltage
Connect the speed controller as shown below.
• Connect the external I/O signals to each speed controller.
• If the speed will vary among the respective motors, make adjustments as follows;
Speed controller 1: Connect a resistor of 1.5 kΩ, 1/4 W to VM terminal
Speed controller 2 and subsequent speed controllers: Connect a variable resistor VRn of 5 kΩ, 1/4 W
0 to 5 VDC
or
0 to 10 VDC
DC power supply
1.5 kΩ
1/4 W
VRn
5 kΩ1/4 W
Control line
VM
VL
L
N
TB1 CN1 VM
VL
L
N
TB1 CN1
Power supply line
Speed controller 1 Speed controller n
Current capacity (I) of external DC power supply when the number of speed controllers is n:
Current capacity (I) = 1 × n (mA)
Example: If two speed controllers are used
Current capacity (I) = 1 × 2 (mA), current capacity (I) is calculated as 2 mA or more.
6.7 Repeated cycle of operation/instantaneous stop
When operating/instantaneous stop of the motor is repeated in short cycles, the rise in motor temperature
will increase and the continuous-operation time will be limited.
Use the motor at the repetition cycle shown below.
6 W to 40 W: 2 seconds (operation 1 second, standstill 1 second)
60 W and 90 W: 4 seconds (operation 2 seconds, standstill 2 seconds)
6.8 Braking current at instantaneous stop
When turning the FWD input and REV input ON simultaneously, the braking current ows for
0.4 seconds and the motor stops instantaneously. Since the following current will ow when the motor
stops instantaneously, use the power supply which current capacity is large enough.
Motor output
power
Braking current (Peak value)
Single-phase
100/110/115 V Single-phase 200/220/230 V
6 W 2 A 1 A
15 W 4 A 3 A
25 W 8 A 4 A
40 W 12 A 7 A
60 W 22 A 9 A
90 W 29 A 13 A

−17−
Alarms
7 Alarms
When the protective function is actuated and an alarm generates, the ALARM-OUT output will turn
OFF. The motor coasts to a stop and once the motor has stopped, the motor output shaft becomes free.
At the same time, the ALARM LED will start blinking. The cause of the alarm can be checked by
counting the number of times the ALARM LED blinks.
The ALARM LED will illuminate briey when the control DC power is turned on. This is not a
malfunction.
Example: Timing chart for blinking LED when
the motor lock alarm is generated
0.3 s
Interval
0.3 s
 Alarm list
No. of
ALARM
LED blinks Alarm type Cause Remedial action
2 Motor lock
•The motor output shaft was locked for a
minimum of 5 seconds.
•The tachogenerator lead wire or motor
power line of the motor cable occurred
disconnection or poor connection.
•The capacitor was not connected or
occurred poor connection.
•Reduce the load.
•Improve the operation
condition such as the
acceleration time or
deceleration time.
•Check the connections of
the motor connector part
and capacitor.
9 Motor overheat
•The motor abnormally produced heat
from any cause, and a built-in overheat
protection device (thermal protector) of the
motor was activated (OPEN).
•The motor power line occurred
disconnection or poor connection.
•The capacitor is connected wrongly (short
circuited).
 How to reset the alarm
To reset an alarm, be sure to remove the cause of the alarm and then perform one of the following
operations:
• Turn the ALARM-RESET input ON for at least 10 ms.
• Cycle the control DC power.
Note
•Be sure to remove the cause of the alarm and then reset the alarm.
•Alarms cannot be reset if the FWD input or REV input is ON.
The ALARM-RESET input is enabled only while the motor is stopped.

−18−
Inspection
 Timing chart
The timing chart shown here is an example when the thermal protector is activated and the motor
overheat alarm is generated.
ALARM-RESET input
ALARM-OUT output
Motor operation
10 ms or more
FWD input or REV input
10 ms or more*3
ON
OFF
ON
OFF
OPEN
CLOSE
Lit
OFF
ON
OFF
ON
OFF
AC power supply
Control DC power supply
0.3 s0.3 s1s1 s
Approx. 100 ms or more
Thermal protector
ALARM LED *1
*2
*1 When closing the thermal protector while the AC power supply has been turned ON, the blinking rate of
the ALARM LED will be slower.
*2 Although the ALARM-OUT output is turned ON if the thermal protector was closed, the operation will not
restart until the alarm is cleared by the ALARM-RESET input.
*3 To restart the motor, wait for at least 10 ms and then turn any of the input signal for operation ON.
8 Inspection
It is recommended that periodic inspections be conducted for the items listed below after each operation
of the motor. If an abnormal condition is noted, discontinue any use and contact your nearest oce.
 During inspection
• Are there any scratches, signs of stress in the cable?
• The openings in the speed controller are not blocked.
• The main circuit terminal screws and control circuit terminal screws are not loose.
Note The speed controller uses semiconductor elements, so be extremely careful when
handling them. Static electricity may damage the speed controller.

−19−
Troubleshooting and remedial actions
9 Troubleshooting and remedial actions
During motor operation, the motor or speed controller may fail to function properly due to an improper
speed setting or wiring. When the motor cannot be operated correctly, refer to the contents provided in
this section and take appropriate action. If the problem persists, contact your nearest oce.
Note Certain items must be checked with the power on. Be careful not to touch any live
connections.
Phenomenon Possible cause Remedial action
•The motor does not operate.
•The speed doesn't change.
Both the FWD input and REV input
are OFF. Turn either FWD input or REV input
ON.
Both the FWD input and REV input
are ON.
The internal potentiometer or
external potentiometer is not
adjusted.
The factory setting is 0 r/min. Turn the
potentiometer clockwise.
The INT/EXT input is ON when
using the internal potentiometer. Turn the INT/EXT input OFF.
The external potentiometer is not
connected correctly. Check the connection.
The INT/EXT input is OFF when
using the external potentiometer. Turn the INT/EXT input ON.
The motor or capacitor is not
connected correctly. Check the connection.
The motor speed does not
change to the set speed.
The speed command voltage
select switch (SW1-1) is being ON
when the external potentiometer is
used. Turn the speed command voltage
select switch (SW1-1) to OFF.
The speed command voltage
select switch (SW1-1) is being ON
when the speed command voltage
is 0 to 5 VDC.
The motor is rotating at the
maximum speed, while the
speed cannot be changed.
The rate generator is not
connected correctly. Check the connection.
•Motor operation is unstable.
•Motor vibration is too great. E󰀨ect of electrical noise. See p.7 for measures with regard to
noise.
The motor doesn't start
instantaneously. The acceleration time is too long. Adjust the acceleration potentiometer.
Load inertia may be excessive. Reduce the load inertia.
The motor doesn't stop
instantaneously. Load inertia may be excessive. Increase the frictional load or reduce the load inertia.

• Unauthorized reproduction or copying of all or part of this manual is prohibited.
If a new copy is required to replace an original manual that has been damaged or lost, please contact
your nearest Oriental Motor branch or sales oce.
• Oriental Motor shall not be liable whatsoever for any problems relating to industrial property rights
arising from use of any information, circuit, equipment or device provided or referenced in this
manual.
• Characteristics, specications and dimensions are subject to change without notice.
• While we make every eort to oer accurate information in the manual, we welcome your input.
Should you nd unclear descriptions, errors or omissions, please contact the nearest oce.
• is a registered trademark or trademark of Oriental Motor Co., Ltd., in Japan and
other countries.
Other product names and company names mentioned in this manual may be registered trademarks
or trademarks of their respective companies and are hereby acknowledged. The third-party products
mentioned in this manual are recommended products, and references to their names shall not be
construed as any form of performance guarantee. Oriental Motor is not liable whatsoever for the
performance of these third-party products.
© Copyright ORIENTAL MOTOR CO., LTD. 2012
Published in June 2021
• Please contact your nearest Oriental Motor oce for further information.
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