Mitsubishi Electric FX3G-14M series Hardware Manual page 4

2.4 Procedures for installing directly (with M4
screws)
The product can be installed directly on the panel (with screws).
This section explains the installation of the main units.
As for the details of the installation/detaching for input/output
extension units/blocks and special adapters, refer to the following
manual.
→ Refer to FX
Series User's Manual - Hardware Edition.
3G
2.4.1 Mounting hole pitches
Refer to the External Dimensions (section 1.2) for the product's
mounting hole pitch information.
As for the details of the mounting hole pitches for extension unit/
block and special adapters, refer to the following manual.
→ Refer to FX
Series User's Manual - Hardware Edition.
3G
2.4.2 Installation
1) Make mounting holes in the
mounting surface referring to
the external dimensions
B
diagram.
2) Fit the main unit (A in the right
figure) based on the holes, and
secure it with M4 screws (B in
the right figure).
The mounting hole pitches and
number of screws depend on
t h e p r o d u c t . R e f e r t o t h e
A
external dimensions diagram
(Section 1.2).
B
3. Power supply/input/output specifications
and examples of external wiring
As for the details of the power supply wiring and input/output wiring,
refer to the following manual.
→ Refer to FX Series User's Manual - Hardware Edition.
3G
DESIGN
PRECAUTIONS
• Make sure to have the following safety circuits outside of the
PLC to ensure safe system operation even during external
power supply problems or PLC failure.
Otherwise, malfunctions may cause serious accidents.
1) Most importantly, have the following: an emergency stop
circuit, a protection circuit, an interlock circuit for opposite
movements (such as normal vs. reverse rotation), and an
interlock circuit (to prevent damage to the equipment at the
upper and lower positioning limits).
2) Note that when the PLC CPU detects an error, such as a
watchdog timer error, during self-diagnosis, all outputs are
turned off. Also, when an error that cannot be detected by
the PLC CPU occurs in an input/output control block,
output control may be disabled.
External circuits and mechanisms should be designed to
ensure safe machinery operation in such a case.
3) Note that when an error occurs in a relay, triac or transistor
output device, the output could be held either on or off.
For output signals that may lead to serious accidents,
external circuits and mechanisms should be designed to
ensure safe machinery operation in such a case.
DESIGN
PRECAUTIONS
• Do not bundle the control line together with or lay it close to the
main circuit or power line. As a guideline, lay the control line at
least 100mm (3.94") or more away from the main circuit or
power line.
Noise may cause malfunctions.
• Install module so that excessive force will not be applied to the
built-in programming connectors, power connectors or I/O
connectors.
Failure to do so may result in wire damage/breakage or PLC
failure.
Notes
• Simultaneously turn on and off the power supplies of the main
unit and extension devices.
• Even if the AC power supply causes an instantaneous power
failure for less than 10 ms, the PLC can continue to operate.
• Even if the DC power supply causes an instantaneous power
failure for less than 5 ms, the PLC can continue to operate.
• If a long-time power failure or an abnormal voltage drop occurs,
the PLC stops, and output is turned off. When the power
supply is restored, it will automatically restart (when the RUN
input is on).
WIRING
PRECAUTIONS
• Cut off all phases of the power supply externally before
installation or wiring work in order to avoid damage to the
product or electric shock.
WIRING
PRECAUTIONS
• Connect the AC power supply to the dedicated terminals
specified in this manual.
If an AC power supply is connected to a DC input/output
terminal or DC power supply terminal, the PLC will burn out.
• Do not wire vacant terminals externally.
Doing so may damage the product.
• Perform class D grounding (grounding resistance: 100Ω or
less) to the grounding terminal on the FX Series main unit
3G
2
with a wire 2 mm or thicker.
Do not use common grounding with heavy electrical systems
(refer to section 3.3).
• When drilling screw holes or wiring, make sure cutting or wire
debris does not enter the ventilation slits.
Failure to do so may cause fire, equipment failures or
malfunctions.
• Make sure to properly wire to the terminal in accordance with
the following precautions.
Failure to do so may cause electric shock, equipment failures, a
short-circuit, wire breakage, malfunctions, or damage to the
product.
- The disposal size of the cable end should follow the
dimensions described in the manual.
- Tightening torque should follow the specifications in the
manual.
- Tighten the screws using a Phillips-head screwdriver No.2
(shaft diameter 6mm (0.24") or less). Make sure that the
screwdriver does not touch the partition part of the terminal
block.
Notes
• Input/output wiring 50 to 100m (164'1" to 328'1") long will cause
almost no problems of noise, but, generally, the wiring length
should be less than 20m (65'7") to ensure the safety.
• Extension cables are easily affected by noise. Lay the cables
at a distance of at least 30 to 50mm (1.19" to 1.97") away from
the PLC output and other power lines.
3.1 Wiring
This section explains the wiring of the terminal type.
For the connectors types, refer to the following manual.
→ Refer to FX
3G Series User's Manual - Hardware Edition.
3.1.1 Cable end treatment and tightening torque
For the terminals of FX series PLC, M3 screws are used.
3G
The electric wire ends should be treated as shown below.
Tighten the screws to a torque of 0.5 to 0.8 N•m.
Do not tighten terminal screws with a torque outside the above-
mentioned range. Failure to do so may cause equipment failures or
malfunctions.
• When one wire is connected to one terminal
φ3.2 (0.13")
Terminal Solderless
screw terminal
6.2 mm (0.24")
or less
φ3.2 (0.13")
6.2 mm (0.24")
Terminal
or less
<Reference>
Terminal Applicable Pressure
Type No. Certification
manufacturer cable bonding tool
FV1.25-B3A AWG22 to 16
J.S.T. Mfg. YA-1 (J.S.T.
UL Listed
Co., Ltd. Mfg. Co., Ltd.)
FV2-MS3 AWG16 to 14
*
• When two wires are connected to one terminal( 1)
φ3.2 (0.13")
Terminal Solderless
6.2 mm (0.24")
screw terminal
or less
6.3 mm(0.25")
or more
φ3.2 (0.13")
Terminal
6.2 mm (0.24")
or less
6.3 mm(0.25")
or more
<Reference>
Terminal Applicable Pressure
Type No. Certification
manufacturer cable bonding tool
J.S.T. Mfg. YA-1 (J.S.T.
FV1.25-B3A AWG22 to 16 UL Listed
Co., Ltd. Mfg. Co., Ltd.)
*
( 1) To adapt the LVD directive (EN61010-2-201:2013) of the
EC directive, avoid the wiring with two wires to the built-in
terminal, and take an appropriate action such as adding an
external terminal.
For the time of compliance with the LVD directive (EN61010-
2-201:2013), refer to FX Series User's Manual - Hardware
3G
Edition.
3.1.2 Removal and installation of quick-release terminal
block
Removal Unscrew the terminal block mounting screw [both right
and left screws] evenly, and remove the terminal block.
Installation Place the terminal block in the specified position, and
tighten the terminal block mounting screw evenly [both
right and left screws].
Tightening torque 0.4 to 0.5 N•m
Do not tighten the terminal block mounting screws
exceeding with a torque outside the above-mentioned
range.
Failure to do so may cause equipment failures or
malfunctions.
*
( ) Pay attention so that the center of the terminal block
is not lifted.