Connection of motor with encoder (vector control)
64
Instructions for encoder cable wiring
• Use shielded twisted pair cables (0.2 mm
2
or larger) to connect the FR-A8AP. For the wiring to terminals PG and SD, use
several cables in parallel or use a thick cable, according to the wiring length.
To protect the cables from noise, run them away from any source of noise (such as the main circuit and power supply
voltage).
∗1
When differential line driver is set and a wiring length is 30 m or more.
The wiring length can be extended to 100 m by increasing the 5 V power supply (approximately to 5.5 V) while using six or more 0.2 mm
2
gauge
cables in parallel or a 1.25 mm
2
or larger gauge cable. The voltage applied must be within power supply specifications of encoder.
• To reduce noise of the encoder cable, earth (ground) the encoder's shielded cable to the enclosure
(as close as possible to the inverter) with a P-clip or U-clip made of metal.
• When one encoder is shared between FR-A8AP and CNC (computerized numerical controller), its output signal should be
connected as shown below. In this case, the wiring length between FR-A8AP and CNC should be as short as possible,
within 5 m.
NOTE
• For the details of the optional encoder dedicated cable (FR-JCBL/FR-V7CBL), refer to
• The FR-V7CBL is provided with a P-clip for earthing (grounding) shielded cables.
∗1
The pin number differs according to the encoder used.
The control works properly with or without the Z-phase being connected.
∗2
Connect the encoder so that there is no looseness between the motor and motor shaft. Speed ratio must be 1:1.
∗3
Earth (ground) the shield of the encoder cable to the enclosure using a tool such as a P-clip. (Refer to
.)
∗4
For the complementary, set the terminating resistor selection switch to OFF position. (Refer to
.)
∗5
A separate power supply of 5 V / 12 V / 15 V / 24 V is necessary according to the encoder power specification.
When the encoder output is the differential line driver type, only 5 V can be input.
Make the voltage of the external power supply the same as the encoder output voltage, and connect the external
power supply between PG and SD.
∗6
For terminal compatibility of the FR-JCBL, FR-V7CBL, and FR-A8AP, refer to
Wiring length
Parallel connection
Larger-size cable
Within 10 m
At least two cables in parallel
Cable gauge 0.2 mm
2
0.4 mm
2
or larger
Within 20 m
At least four cables in parallel
0.75 mm
2
or larger
Within 100 m
At least six cables in parallel
1.25 mm
2
or larger
PZ2
PZ1
PA1
PA2
FB1
FB2
SD
PG
G
F
D
C
B
A
R
S
Encoder
2 mm
2
FR-A800
(FR-A8AP)
Example of parallel connection
with two cables
(with complementary encoder output)
Encoder cable
Shield
P-clip
Earthing (grounding) example using a P-clip
NC
Maximum 5 m
(two parallel cables)
Inverter
(FR-A8AP)
Encoder
Summary of Contents for FR-A842-07700
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