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*
Please read your User's manual carefully so that you will understand the operation and safety precautions before attempting to operate the system.
C-33
Speed
controller
Brake
U
nit
O
ptions
Index
EX48 type
Speed controller
*
Please read your User's manual carefully so that you will understand the operation and safety precautions before attempting to operate the system.
C-32
Multispeed setting application
11
Speed change with analog signal
12
<Precautions>
1. Set external speed changers VR1, VR2 and VR3 to 3 different speeds and select the desired speed from
SW8.
2. When activating the brake, simultaneously switch over SW3 and RUN-STOP of other switches.
3. For remaining wirings, refer to the corresponding wiring diagrams.
Parallel operation through external speed changer
14
<Precautions>
1. The resistance Rs of the external speed changer VR
should be as follows:
Rs = 20/N (k
Ω
)
where, N is the number of motors.
2. For synchronous operation or ratio operation, desired
revolving speeds must be set from the maximum
speed control.
Soft-start and soft-down controls and operation
changeover switch must be set to the same position.
3. Wirings from the external speed changer VR should
be connected to the same pins (No.3 and No.6) on
the controller.
4. Malfunction may occur as the number of devices
operated in parallel increases.
To secure correct operation, connect a noise filter to
each unit.
5. For other electrical connections, refer to correspond-
ing circuit/wiring diagrams.
Parallel operation through analog signal
15
<Precautions>
The input impedance of the controller is approx. 22 k
Ω
.
The output impedance of the analog signal source
should be determined based on the total input
impedance of the speed controllers.
For other precautions, refer to [14] Parallel operation
through external speed changer and [12] Speed change
with analog signal.
<Precautions>
1. Soft-operation can be adjusted from the soft-start and soft-down
controls or by using analog signal.
2. The absolute maximum rating of analog signal is 5 VDC.
The system should be designed to use standard 3 VDC analog
signal. If the signal voltage exceeds 3 VDC, the circuit diagram
shown below should be used for wiring.
3. Revolution speed “0” signal should not exceed 0.1 VDC.
4. The percentage ripple of analog voltage signal should be 2% or
less.
5. For other wirings, refer to the corresponding circuit/wiring
diagrams.
SW2
SW3
SW8
VR1
VR2
VR3
DV0P002
(option)
DC10V
10 mA
3
7
6
4
Pin No.
3
1
SW8
SW2
RUN
STOP
3
2
1
2
3
1
2
To TG
To TG
VR1
VR2
VR3
3
7
6
5
4
Pin No.
3
1
SW8
SW3
RUN
3
2
1
2
3
1
2
VR1
VR2
VR3
3
6
Pin No.
e
max
R2
R1
1 k
Ω
0
500
1000
1400
1700
Analog signal (DC)
(min
–
1
)
1
2
3 (V)
MAX DC5 V
GND
3
6
22 k
Ω
Operation through contactless signal
13
• Small signal relays SW2 and SW3 can be replaced with transistor.
4 or 5
7
6
Pin No.
Tr1
2
3
1
VR
3
7
6
Pin No.
3
7
6
Pin No.
To TG
To TG
To TG
To TG
GND
DC
0 to +3 V
3
7
6
Pin No.
3
7
6
Pin No.
Speed controller
Speed controller
Speed controller
Speed controller
Speed controller
Speed controller
Speed controller
BRAKE
To TG
No braking applied
Braking applied
R2 – 1 k
Ω
e
max
3
e
max : Analog signal max. voltage
R1 : External resistor: 1 kW
R2 : External resistor
