Mitsubishi Electric FX3G-14M series Hardware Manual page 6

3.4.3 Examples of input wiring [DC power type]
1.Sink input type 2.Source input type
[1] [1]
Fuse
( * 1) *
( 1)
24V DC 24V DC
S/S S/S
* ( * 2)
( 2)
X000 X000
X001 X001
3-wire type 3-wire type
X002 X002
sensor sensor
X003 X003
[2] [2]
S/S S/S
X000 X000
*
( 1) Class D grounding
See section 3.3 for details.
*
( 2) Do not connect the [ ] terminals with others,
since they are not available.
[1]:Main unit, Input/output extension unit
(Common to both sink and source inputs)
[2]:Input/output extension block
(Common to both sink and source inputs)
3.4.4 Instructions for connecting input devices
As for the details of Instructions for connecting input devices, refer to
the following manual.
→ Refer to FX Series User's Manual - Hardware Edition.
3G
1) In the case of no-voltage contact:
The input current of this PLC is 5 to 7mA/24V DC.
Use input devices applicable to this minute current.
If no-voltage contacts (switches) for large current are used,
contact failure may occur.
2) In the case of input device with built-in series diode:
The voltage drop of the series diode should be approx. 4V or
less.
When lead switches with a series LED are used, up to two
switches can be connected in series.
Also make sure that the input current is over the input-sensing
level while the switches are ON.
3) In the case of input device with built-in parallel resistance:
Use a device with a parallel resistance of 15kΩ or more.
When the resistance is less than 15kΩ, connect a bleeder
resistance.
4) In the case of 2-wire proximity switch:
Use a two-wire proximity switch whose leakage current is 1.5mA
or less when the switch is off.
When the current is larger than 1.5mA, connect a bleeder
resistance.
3.4.5 Input specifications (100V AC input type)
Item
Number FX 2N -8EX-UA1/UL 8 points
of input
Fuse
FX -48ER-UA1/UL 24 points
2N
points
Input connecting type
Refer to FX
User's Manual - Hardware Edition
Input form
Input signal voltage 100 to 120 V AC
Approx. 21kΩ/50Hz
Input impedance
Approx. 18kΩ/60Hz
4.7mA/100V AC 50Hz
Input signal current
6.2mA/110V AC 60Hz
ON input sensitivity current 3.8mA/80V AC
OFF input sensitivity current 1.7mA/30V AC
Input response time Approx. 25ms to 30ms
Input signal form Contact input
Input circuit insulation Photocoupler insulation
LED on panel lights when
Input operation display
photocoupler is driven.
3.4.6 Examples of 100V AC input wiring
Fuse
Input/
L
output *
( 1)
extension
N
unit
COM
X000
X001
X002
Input/
output COM
extension
X000
block
X001
*
MC( 2)
*
( 1) Class D grounding
See section 3.3 for details.
*
( 2) Do not take input signals from loads generating surge.
3.5 Relay output specifications and example of
external wiring
Specification
As for the details of the relay output specifications and external
wiring, refer to the following manual.
→ Refer to FX
3G
3.5.1 Relay output specifications
Series
3G
Item
FX -8ER
2N
FX -14MR
3G
FX -8EYR
2N
Number
FX -24MR
3G
of output
points
FX 3G -40MR,
FX -32ER,
2N
FX -16EYR
2N
FX -60MR,
3G
FX -48ER
2N
Output connecting type
Output form
External power supply
Resistance load
Max. load
Inductive load
Min. load
Open circuit leakage current
OFF→ON
Response
time
ON→OFF
Circuit insulation
Display of output operation
*
( 1) Each value inside ( ) indicates the number of occupied points.
*
( 2) Between 250V and 240V CE, UL, and cUL are not compliant.
*
( 3) The total load current of resistance loads per common
terminal should be the following value or less.
- 1 output point/common terminal : 2A
- 4 output points/common terminal : 8A
- 8 output points/common terminal : 8A
As for the number of outputs per common terminal, refer to
"Chapter 4 interpretation of partition" and the following manual.
→ Refer to FX
3G
3.5.2
The product life of relay contacts considerably varies depending on
the load type used. Take care that loads generating reverse
electromotive force or rush current may cause poor contact or
deposition of contacts which may lead to considerable reduction of
Series User's Manual - Hardware Edition.
the contact product life.
1) Inductive load
Inductive loads generate large reverse electromotive force
Specification
between contacts at shutdown may cause arcing. At a fixed
current consumption, as the power factor (phase between current
*
4 points(8 points)( 1)
and voltage) gets smaller, the arc energy gets larger.
*
6 points(8 points)( 1) The standard life of the contact used for Inductive loads, such as
contactors and solenoid valves, is 500 thousand operations at
8 points
20VA.
The following table shows the approximate life of the relay based
*
10 points(16 points)( 1)
on the results of our operation life test.
Test condition: 1 sec. ON / 1 sec. OFF.
16 points
24 points
Refer to FX Series User's
3G
Manual - Hardware Edition
Relay
30V DC or less
*
240V AC or less( 2)
The product life of relay contacts becomes considerably shorter
*
than the above conditions when the rush overcurrent is shut
2A/point( 3)
down.
80VA
5V DC, 2mA (reference value)
Some types of inductive loads generate rush current 5 to 15 times
the stationary current at activation. Make sure that the rush
-
current does not exceed the current corresponding to the
maximum specified resistance load.
Approx. 10ms
2) Lamp load
Lamp loads generally generate rush current 10 to 15 times the
Mechanical insulation
stationary current. Make sure that the rush current does not
LED lights when power is applied exceed the current corresponding to the maximum specified
to relay coil. resistance load.
3) Capacitive load
Capacitive loads can generate rush current 20 to 40 times the
stationary current. Make sure that the rush current does not
exceed the current corresponding to the maximum specified
resistance load. Capacitive loads such as capacitors may be
present in electronic circuit loads including inverters.
3.5.3
Series User's Manual - Hardware Edition.
Life of relay output contact
Load capacity Contact life
0.2A/100V AC
20VA 3 million times
0.1A/200V AC
0.35A/100V AC
35VA 1 million times
0.17A/200V AC
0.8A/100V AC
80VA 2 hundred thousand times
0.4A/200V AC
→ For countermeasures while using inductive loads,
refer to Subsection 3.5.4.
→ For the maximum specified resistance load,
refer to Subsection 3.5.1.
Example of relay output wiring
Load
Y0
DC power
supply
Fuse
COM0
Load
Y1
AC power
Fuse supply
COM1
PLC