Wiring Of Terminals Related To The Encoder - Mitsubishi Electric 800 Series Instruction Manual

3.3.3

Wiring of terminals related to the encoder

Use shielded twisted pair cables (0.2 mm
For the wiring to the 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 (e.g. the main circuit and power voltage).
Parallel connection
Wiring length
(Cable gauge 0.2 mm
Within 10 m At least two cables in parallel
Within 20 m At least four cables in parallel
Within 100 m At least six cables in parallel


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
a 1.25 mm 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 metal P-clip or U-clip.
NOTE
• For 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) for connection the encoder.
Larger-size cable
2
)
2
0.4 mm or larger
2
0.75 mm or larger
2
1.25 mm or larger
2
gauge cables in parallel or
Example of parallel connection
with two cables
(with complementary encoder output)
FR-A800
(FR-A8TP)
PA3
PAR3
PB3
PBR3
PZ3
PZR3
PG
SD
2
2 mm
Earthing (grounding)
example using a P-clip
Encoder cable
Shield
P-clip
page 34.
WIRING
Encoder
A
B
C
D
F
G
S
R
3
33