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Connection of motor with encoder (vector control)
Switches of the FR-A8AP
• Encoder type selection switch (SW3)
Selects either the differential line driver or complementary setting.
It is initially set to the differential line driver. Switch its position according to the
output circuit.
• Terminating resistor selection switch (SW1)
Selects ON/OFF of the internal terminating resistor.
Set the switch to ON (initial status) when an encoder output type is
differential line driver, and set to OFF when complementary.
ON: with internal terminating resistor (initial status)
without internal terminating resistor
OFF:
NOTE
• Set all switches to the same setting (ON/OFF).
• Set the switch "OFF" when sharing an encoder with another unit (NC
(computerized numerical controller), etc.) having a terminating resistor
under the differential line driver setting.
• Motor and switch setting
Motor
Mitsubishi standard motor with encoder
Mitsubishi high-efficiency motor with
encoder
Mitsubishi constant-torque motor with
encoder
Vector control dedicated motor
Other manufacturer's motor with encoder

Set according to the motor (encoder).

Prepare an encoder's power supply (5 V/12 V/15 V/24 V) according to the encoder's output voltage.

When the encoder output is the differential line driver type, only 5 V can be input.
NOTE
• The SW2 switch is for manufacturer setting. Do not change the setting.
• Encoder specification
Item
Resolution
1024 pulses/rev
Power supply voltage
5 VDC ±10%
Current consumption
150 mA
A, B phases (90° phase shift)
Output signal form
Z phase: 1 pulse/rev
Output circuit
Differential line driver 74LS113 equivalent
H level: 2.4 V or more
Output voltage
L level: 0.5 V or less
52
INSTALLATION AND WIRING
Encoder type selection
SF-JR
Differential
SF-HR
Differential
Other

SF-JRCA
Differential
SF-HRCA
Differential
Other

SF-V5RU
Complementary

Encoder for SF-JR
Internal terminating
resistor-ON
(initial status)
Internal terminating
resistor-OFF
Terminating resistor
switch (SW3)
selection switch (SW1)
ON
ON

ON
ON

OFF

Encoder for SF-V5RU
2048 pulses/rev
12 VDC ±10%
150 mA
A, B phases (90° phase shift)
Z phase: 1 pulse/rev
Complementary
H level: (Power supply for encoder-3 V) or more
L level: 3 V or less
Differential line
driver (initial status)
1
O
2
N
SW2
SW3
Complementary
O
1
2
N
SW2
Power supply
specification
5 V
5 V

5 V
5 V

12 V

SW3


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