Mitsubishi Electric FR-A700 Instruction Manual page 79

Wiring
Instructions for encoder cable wiring
Use twisted pair shield cables (0.2mm² or larger) to connect the FR-A7AP and position detector.
Cables to terminals PG and SD should be connected in paralell 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 supply voltage).
Wiring Length
Tab. 3-19: Cable gauges and number of paralell cables
When differential line driver is set 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 0.2mm² in parallel or a cable with gauge
size of 1.25mm² 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 enclos-
ure (as near as the inverter) with a P clip or U clip made of metal.
NOTE For details of the optional encoder dedicated cable (FR-JCBL), refer to page 3-37.
FR-A700 EC
≤ 10m
At least 2 cables
≤ 20m
At least 4 cables
≤ 100m
At least 6 cables
Encoder cable
Shield
P clip
Connection of motor with encoder (vector control)
Paralell Connection
Cable gauge 0.2mm²
Fig. 3-31:
Earthing (grounding) example using a P clip
Larger-Size Cable
≥ 0.4mm²
≥ 0.75mm²
≥ 1.25mm²
I001448E
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