Mitsubishi Electric FX3UC-16MT/DSS Hardware Manual page 5

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 5 ms or less, 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.
• The temperature rating of the cable should be 80°C or more.
WIRING
PRECAUTIONS
• Connect the DC power supply wiring to the dedicated terminals
described 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.
• Make sure to properly wire to the terminal block (European
type) 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.
- Twist the end of strand wire and make sure that there are no
loose wires.
- Do not solder-plate the electric wire ends.
- Do not connect more than the specified number of wires or
electric wires of unspecified size.
- Affix the electric wires so that neither the terminal block nor
the connected parts are directly stressed.
Notes
• Input/output wiring 50 to 100 m (164'1" to 328'1") long will
cause almost no problems of noise, but, generally, the wiring
length should be less than 20 m (65'7") to ensure the safety.
• Extension cables are easily affected by noise. Lay the cables at
a distance of at least 30 to 50 mm (1.19" to 1.97") away from
the PLC output and other power lines.
3.1 Power supply specifications and example of
external wiring
→ For more details, refer to FX Series User's Manual
3UC
- Hardware Edition.
3.1.1 Power supply specifications
The specifications for the power supply of the main unit are shown in
the following table.
Item Specification
Supply voltage 24 V DC
Voltage fluctuation range +20% -15%
Ripple Voltage (p-p) 5% or less
Operation can be continued
Allowable instantaneous power upon occurrence of an
failure time instantaneous power failure
for 5 ms or less.
Power fuse 125 V 3.15 A
Rush current 30 A max.0.5 ms/24 V DC
FX -16MT/D(SS)
3UC
6 W
FX -16MR/D(S)-T
3UC
Power
FX -32MT/D(SS) 8 W
consumption 3UC
*
( 1)
FX -64MT/D(SS) 11 W
3UC
FX -96MT/D(SS) 14 W
3UC
FX -16MT/D(SS)
3UC
600 mA
5 V DC FX -16MR/D(S)-T
3UC
built-in
FX -32MT/D(SS) 560 mA
3UC
power
* FX -64MT/D(SS) 480 mA
supply( 2) 3UC
FX -96MT/D(SS) 400 mA
3UC
( * 1) Input/output extension blocks and special function units/blocks
a r e n o t c on t a in e d in po w er c o ns um p t io n . F or p ow er
consumption of the FX input/output extension blocks, refer
2NC
to the following table.
→ Refer to the FX Series User's Manual - Hardware Edition.
3UC
→ For the power consumed by the special function units/blocks,
refer to the appropriate manuals.
Model names Power consumption
FX -16EX-T(-DS) 2.2 W
2NC
FX -16EX(-DS) 2.2 W
2NC
FX -32EX(-DS) 4.2 W
2NC
FX -16EYR-T(-DS) 2.2 W
2NC
FX -16EYT(-DSS) 0.35 W
2NC
FX 2NC -32EYT(-DSS) 0.7 W
*
( 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 24 V DC power to the main unit and FX -EX(-T) using
2NC
the dedicated connector.
→ For the details of wiring work, refer to Section 2.4.
→ For the power supply wiring of the FX input extension
2NC
blocks, refer to the Subsection 3.3.3.
For DC power supply, use the products with 24 V DC, a voltage
fluctuation range of -15% to +20%, and whose ripple (p-p) is within
5%. The allowable range of the 24 V DC power supply may be
narrower when special function units/blocks are connected.
→ For more details, refer to the FX Series User's Manual -
3UC
Hardware Edition.
24 V DC
Class D
Fuse
grounding
Breaker,Circuit
PL
protector,Fuse etc.
Power
MC
on
Emergency
PLC
stop
Power supply for loads connected to PLC output terminals
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.
Other Other
PLC PLC PLC
equipment equipment
Independent grounding Shared grounding Common grounding
(Best condition) (Good condition) (Not allowed)
• 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 Series User's Manual -
3UC
Hardware Edition.
3.3.1 Input specifications
Item Input specification (24 V DC)
FX -16MT/D(SS)
3UC
8 points
FX -16MR/D(S)-T
3UC
FX -32MT/D(SS) 16 points
3UC
FX -64MT/D(SS) 32 points
3UC
Number of input
points FX 3UC -96MT/D(SS) 48 points
FX -16EX(-DS) 16 points
2NC
FX -32EX(-DS) 32 points
2NC
FX -16EX-T(-DS) 16 points
2NC
FX 3UC -MT/D(SS)
connector
FX -EX(-DS)
2NC
Input connecting
type
FX 3UC -16MR/D(S)-T
Terminal block
FX -16EX-T(-DS)
2NC
Item Input specification (24 V DC)
FX 3UC -MT/D
FX -16MR/D-T
3UC
FX -EX
2NC
FX -16EX-T
2NC
Input form
FX -MT/DSS
3UC
FX -16MR/D(S)-T
3UC
FX -EX-DS
2NC
FX -16EX-T-DS
2NC
Input signal 24 V DC, Voltage fluctuation range +20% -15%,
voltage Ripple voltage (p-p) 5% or less
X000 to X005
X006, X007
Input
impedance
*
Refer to X010 or more ( 1)
section
Input extension blocks
3.2 for
details.
X000 to X005
X006, X007
Input signal
current
*
X010 or more ( 1)
Input extension blocks
X000 to X005
ON input
X006, X007
sensitivity
*
X010 or more ( 1)
current
Input extension blocks
Input OFF
1.5 mA or less
current
Input response
*
Approx. 10 ms ( 2)
time
FX -MT/D
3UC
Other
FX -16MR/D-T
3UC
equipment
FX -EX
2NC
FX -16EX-T
2NC
Input signal form
(Input sensor
FX -MT/DSS
3UC
form)
FX -16MR/D(S)-T
3UC
FX -EX-DS
2NC
FX -16EX-T-DS
2NC
Input circuit
Photocoupler insulation
insulation
Input operation LED on panel turns ON when photocoupler is
display driven.
( * 1) Does not apply to FX -16M.
3UC
*
( 2) X000 to X017 use adjustable digital filter values.
When setting the input filter for X000 to X005 to 5 μs or
capturing pulses of a 50 to 100 kHz response frequency with a
high speed counter, wire the terminals as stated below.
- The wiring length should be 5 m (16'4") or less.
- Connect a bleeder resistor of 1.5 kΩ (1 W or more) to the
input terminal, so that the sum of the load current of the
open collector transistor output on the connected device
and the input current of the main body is 20 mA or more.
Sink
Sink/Source
3.9 kΩ
3.3 kΩ
4.3 kΩ
6 mA/24 V DC
7 mA/24 V DC
5 mA/24 V DC
3.5 mA or more
4.5 mA or more
3.5 mA or more
No-voltage contact
input
NPN open collector
transistor
• Sink input:
No-voltage
contact input
NPN open collector
transistor
• Source input:
No-voltage
contact input
PNP open collector
transistor