Mitsubishi Electric FR-A700 Series, Technical Manual

Page: 98 / 550

91
1
S
PECIFI
C
A
T
IONS
SPECIFICATIONS
(6) Instructions for encoder cable wiring
Use twisted pair shield cables (0.2mm
2
or larger) to
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).
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
2
in parallel or a cable with gauge size of 1.25mm
2
or
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.
*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.
Wiring
Length
Parallel Connection
Larger-size
Cable
Within 10m
At least two
cables in parallel
Cable gauge
0.2mm
2
0.4mm
2
or
larger
Within 20m
At least four
cables in parallel
0.75mm
2
or
larger
Within
100m
*
At least six cables
in parallel
1.25mm
2
or
larger
* When encoder type is differential line driver and a wiring
length is 30m or more
Encoder cable
Shield
P clip
Earthing (grounding) example using a P clip