3.
Power supply/input/output specifications
and examples of external wiring
3.1
Power supply specifications and example of
external wiring
→
For more details, refer to FX
3UC
Series User's Manual
- Hardware Edition.
3.1.1
Power supply specifications
The specifications for the power supply of the main unit are shown in
the following table.
*1 Input/output extension blocks and special function units/blocks
are not contained i n power consumpti on. For power
consumption of the FX
2NC
input/output extension blocks, refer
to the following table.
→
Refer to the FX
3UC
Series User's Manual - Hardware Edition.
→
For the power consumed by the special function units/blocks,
refer to the appropriate manuals.
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
peripheral device connectors, power connectors or input/output
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 power supply causes an instantaneous power failure
for less than 5ms, 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
•
Make sure to cut off all phases of the power supply externally
before attempting installation or wiring work.
Failure to do so may cause electric shock or damage to the
product.
WIRING
PRECAUTIONS
•
Connect the DC power supply wiring 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: 100
Ω
or
less) to the grounding terminal on the main unit.
Do not use common grounding with heavy electrical systems
(refer to section 3.2).
•
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.
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.
Item
Specification
Supply voltage
24V DC +20% -15%*
1
Ripple Voltage (p-p)5% or
less
Allowable instantaneous power
failure time
Operation can be continued
upon occurrence of an
instantaneous power failure
for 5ms or less.
Power fuse
125V 3.15A
Rush current
30A max.0.5ms/24V DC
Power
consumption
*1
FX
3UC
-16MT/D,DSS 6W
FX
3UC
-32MT/D,DSS 8W
FX
3UC
-64MT/D,DSS 11W
FX
3UC
-96MT/D,DSS 14W
5V DC
built-in
power
supply
*2
FX
3UC
-16MT/D,DSS 600mA
FX
3UC
-32MT/D,DSS 560mA
FX
3UC
-64MT/D,DSS 480mA
FX
3UC
-96MT/D,DSS 400mA
WIRING
PRECAUTIONS
*2 Cannot be used to supply power to an external destination.
This power is supplied to input/output extension blocks, special
extension blocks and special adapters only.
3.1.2
Example of external wiring (power type)
Supply 24V DC power to the main unit and FX
2NC
-
EX(-T) using
the dedicated connector.
→
For the details of wiring work, refer to Section 2.4
→
For the power supply wiring of the FX
2NC
input extension
blocks, refer to the Subsection 3.3.3
Use a 24V DC +20% -15% DC power supply whose ripple (p-p) is
within 5%. The allowable range of the 24V DC power supply may be
narrower when special function blocks/units are connected.
→
For more details, refer to the FX
3UC
Series User's Manual -
Hardware Edition
3.2
Grounding
Ground the PLC as stated below.
•
Perform class D grounding. (Grounding resistance: 100
Ω
or less)
•
Ground the PLC independently if possible.
If it cannot be grounded independently, ground it jointly as shown
below.
•
Position the grounding point as close to the PLC as possible to
decrease the length of the ground wire.
3.3
Input specifications and external wiring
→
For more details, refer to the FX
3UC
Series User's Manual -
Hardware Edition
3.3.1
Input specifications
Model names
Power consumption
FX
2NC
-16EX-T(-DS)
2.2W
FX
2NC
-16EX(-DS)
2.2W
FX
2NC
-32EX(-DS)
4.2W
FX
2NC
-16EYR-T(-DS)
2.2W
FX
2NC
-16EYT(-DSS)
0.35W
FX
2NC
-32EYT(-DSS)
0.7W
24V DC
PL
Power on Emer-
gency
stop
MC
MC
Power supply for loads connected
to PLC output terminals
MC
MC
*
Fuse
PLC
*Class D grounding
Refer to section 3.2
for details.
Circuit protector
PLC
Other
equipment
PLC
Other
equipment
PLC
Other
equipment
Shared grounding
(Good condition)
Common grounding
(Not allowed)
Independent grounding
(Best condition)
Item
Input specification(24V DC)
Number of input
points
FX
3UC
-16MT/D(SS)
8 points
FX
3UC
-32MT/D(SS)
16 points
FX
3UC
-64MT/D(SS)
32 points
FX
3UC
-96MT/D(SS)
48 points
FX
2NC
-16EX(-DS)
16 points
FX
2NC
-32EX(-DS)
32 points
FX
2NC
-16EX-T(-DS)
16 points
Input connecting
type
FX
3UC
-
MT/D(SS)
FX
2NC
-
EX(-DS)
connector
FX
2NC
-16EX-T(-DS)
Terminal block
Input form
FX
3UC
-
MT/D
FX
2NC
-
EX
FX
2NC
-16EX-T
Sink
FX
3UC
-
MT/DSS
FX
2NC
-
EX-DS
FX
2NC
-16EX-T-DS
Sink/Source
Input signal
voltage
24V DC +20% -15%
Ripple Voltage (p-p)5% or less
Input
impedance
X000 to X005
3.9k
Ω
X006, X007
3.3k
Ω
X010 or more
*1
Input extension blocks
4.3k
Ω
Input signal
current
X000 to X005
6mA/24V DC
X006, X007
7mA/24V DC
X010 or more
*1
Input extension blocks
5mA/24V DC
ON input
sensitivity current
X000 to X005
3.5mA or more
X006, X007
4.5mA or more
X010 or more
*1
Input extension blocks
3.5mA or more
Input OFF current 1.5mA or less
Input response
time
Approx. 10ms
*2
Input signal form
FX
3UC
-
MT/D
FX
2NC
-
EX
FX
2NC
-16EX-T
No-voltage contact
input
NPN open collector
transistor
FX
3UC
-
MT/DSS
FX
2NC
-
EX-DS
FX
2NC
-16EX-T-DS
•
Sink input :
No-voltage contact
input
NPN open collector
transistor
•
Source input :
No-voltage contact
input
PNP open collector
transistor
Circuit insulation
Photocoupler insulation
