Mitsubishi Electric FR-A7AL Instruction Manual page 19

(2) Connection with CNC (computer numerical control)
When one position detector is shared between the FR-A7AL and
CNC, its output signal should be connected as shown at the right
figure. In this case, the wiring length between the FR-A7AL and
CNC should be as short as possible (within 5m).
(3) Strip sheath of a shielded twisted pair cable and untwist its wires for
wiring.
Also, perform terminal treatment of the shield to ensure that it will not
make contact with the conductive area.
Strip off the sheath for the below length. If the length of the sheath peeled is too long, a short circuit
may occur with neighboring wires. If the length is too short, wires might come off.
Wire the stripped cable after twisting it to prevent it from becoming loose.
(Do not solder it.)
Use a blade type terminal as required.
Cable stripping length
5mm
INSTALLATION
Position detector
Inverter
(FR-A7AL)
Maximum 5m
(two parallel cables)
Shield
(perform protective treatment)
Sheath
Shielded twisted
pair cable
encoder
CNC
2
13