Mitsubishi Electric FR-A700 Technical Manual page 98

(6) Instructions for encoder cable wiring
Use twisted pair shield cables (0.2mm
connect the FR-A7AP and position detector. Cables
to terminals PG and SD should be connected in
parallel or be larger in size according to the cable
length.
To protect the cables from noise, run them away from
any source of noise (e.g. the main circuit and power
voltage).
Wiring
Parallel Connection
Length
At least two
Within 10m
cables in parallel
At least four
Within 20m
cables in parallel
Within At least six cables
100m in parallel
*
* When encoder type is differential line driver and a wiring
length is 30m or more
The wiring length can be extended to 100m by
slightly increasing the power by 5V (approx. 5.5V)
using six or more cables with gauge size of 0.2mm
in parallel or a cable with gauge size of 1.25mm
more. Note that the voltage applied should be within
power supply specifications of encoder.
To reduce noise of the encoder cable, earth (ground)
the encoder shielded cable to the enclosure (as near
as the inverter) with a P clip or U clip made of metal.
Earthing (grounding) example using a P clip
*1 For details of the optional encoder dedicated cable
(FR-JCBL/FR-V7CBL), refer to page 88.
*2 The FR-V7CBL is provided with a P clip for
earthing (grounding) shielded cable.
2
or larger) to
Larger-size
Cable
2
0.4mm or
larger
Cable gauge
2
0.75mm or
2
0.2mm larger
2
1.25mm or
larger
2
2
or
Encoder cable
Shield
P clip
91
SPECIFICATIONS
1