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2.4
Wiring
(1) Use twisted pair shield cables (0.2mm
2
or larger) to connect the FR-A7AP and position detector.
To protect the cables from noise, run them away from any source of noise (e.g. the main circuit and power voltage).
Wiring Length
Within 10m
Within 20m
Within 100m *
Paralell Connection
At least 2 cables
At least 4 cables
At least 6 cables
Cable gauge
0.2mm
2
Larger-Size Cable
0.4mm
2 or larger
0.75mm
2 or larger
1.25mm
2 or larger
* When differential 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 0.2mm
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.
Earthing (grounding) example using a P clip
Encoder cable
Shield
P clip
2
REMARKS
· 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 cable.
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(2) Connection with the NC (numerical controller)
When one position detector is shared between the FR-A7AP and NC, its output signal should be connected as shown on the right. In this case, the wiring length between the FR-A7AP and NC should be as short as possible, within 5m.
Inverter
(FR-A7AP)
Position detector
Encoder
Maximum 5m
(two parallel cables)
NC
10
(3) Wire the twisted pair shielded cable after stripping its sheath to make its cables loose.
Also, protect the shielded cable of the twisted pair shielded cable to ensure that it will not make contact with the conductive area.
Cable stripping size
Wire the stripped cable after twisting it to prevent it from becoming loose.
In addition, do not solder it.
Use a bar type terminal as required.
5mm
REMARKS
Information on bar terminals
Introduced products (as of August, 2005): Phoenix Contact Co.,Ltd.
Terminal Screw
Size
Bar Terminal Model
(with insulation sleeve)
Bar Terminal Model
(without insulation sleeve)
M2 Al 0.5-6WH A 0.5-6
⋅ Bar terminal crimping tool: CRIMPFOX ZA3 (Phoenix Contact Co., Ltd.)
When using the bar terminal (without insulation sleeve), use care so that the twisted wires do not come out.
Wire Size (mm
2
)
0.3 to 0.5
(4) Loosen the terminal screw and insert the cable into the terminal.
Screw Size Tightening Torque Cable Size
M2 0.22N
⋅ m to 0.25N
⋅ m 0.3mm
2
to 0.75mm
2
Screwdriver
Small flat-blade screwdriver
(Tip thickness: 0.4mm/tip width: 2.5mm )
CAUTION
Undertightening can cause cable disconnection or malfunction. Overtightening can cause a short circuit or malfunction due to damage to the screw or unit.
2
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(5) For wiring of 22K or less , remove a hook of the front cover and use a space become available.
For wiring of 30K or more , use the space on the left side of the control circuit terminal block.
Cut off with a nipper, etc.
22K or less
Cut off a hook on the inverter front cover side surface.
(Cut off so that no portion is left.)
Control circuit terminal block
30K or more
REMARKS
When the hook of the inverter front cover is cut off for wiring, the protective structure (JEM1030) changes to open type
(IP00).
CAUTION
Do not use empty terminals as junction terminals because they are used in the option unit. If they are used as the junction terminals, the option unit may be damaged.
When performing wiring using the space between the inverter front cover and control circuit terminal block, take care not to subject the cable to stress.
After wiring, wire offcuts must not be left in the inverter. They may cause a fault, failure or malfunction.
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