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Mitsubishi Electric 800 Series Hardware Instruction Manual Page 70

Separated converter type.
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 Instructions for encoder cable wiring
• Use shielded twisted pair cables (0.2 mm
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).
Wiring length
Within 10 m
At least two cables in parallel
Within 20 m
At least four cables in parallel
*1
At least six cables in parallel
Within 100 m
*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
cables in parallel or a 1.25 mm
• 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 the FR-A8AP and CNC (computerized numerical controller), its output signal should
be connected as follows. In this case, the wiring length between the FR-A8AP and CNC should be as short as possible,
within 5 m.
Inverter
(FR-A8AP)
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.
2
or larger) to connect the FR-A8AP. For the wiring to terminals PG and SD, use
Example of parallel connection
with two cables
(with complementary encoder output)
FR-A800
(FR-A8AP)
PA1
PA2
FB1
FB2
PZ1
PZ2
PG
SD
2 mm
Parallel connection
Cable gauge
2
0.2mm
2
or larger gauge cable. The voltage applied must be within power supply specifications of encoder.
Earthing (grounding) example using a P-clip
Shield
P-clip
Encoder
NC
Maximum 5 m
(two parallel cables)
Encoder
A
B
C
D
F
G
S
R
2
Larger-size cable
2
0.4 mm
or larger
2
0.75 mm
or larger
2
1.25 mm
or larger
Encoder cable
page
2.8 Connection to a motor with encoder (Vector control)
2
gauge
66.
2. INSTALLATION AND WIRING
1
2
3
4
5
6
7
8
9
10
69

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