Mitsubishi FX3G-14MR/ES - Output Specifications and Wiring

FX3G INSTALLATION MANUAL
13
4.8 OUTPUT SPECIFICATIONS AND WIRING
Relay output
Item
FX3G-
14MR/_
FX3G-
24MR/_
FX3G-
40MR/_
FX3G-
60MR/_
Number of Output Points
6 points
(8) *1
10 points
(16) *1
16 points 24 points
Connecting Type Removable terminal block (M3 screw)
Output Type Relay
External Power Supply
30VDC or less
240VAC or less(250VAC or less when the unit does not
comply with CE, UL or cUL standards)
Maximum
Load
Resistance
Load
2A/point
The total load current of resistance loads per common
terminal should be the following value.
• 1 output point/common terminal: 2A or less
• 4 output points/common terminal: 8A or less
Inductive
Load
80VA
Min. Load 5V DC, 2mA (reference value)
Open Circuit Leakage
Current
-
Response
Time
OFF – ON Approx. 10ms
ON – OFF Approx. 10ms
Input Circuit Insulation Mechanical insulation
Input Operation Display LED on panel lights when power is applied to relay coil
n OUTPUT CIRCUIT CONFIGURATION
1. Each value inside ( ) indicates the number of occupied points.
n LIFE OF RELAY CONTACT
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 the contact product life.
1) Inductive load
Inductive loads generate large reverse electromotive force between
contacts at shutdown may cause arcing. At a fixed current consumption,
as the power factor (phase between current and voltage) gets smaller,
the arc energy gets larger. The standard life of the contact used
for Inductive loads, such as contactors and solenoid valves, is 500
thousand operations at 20VA. The following table shows the approximate
life of the relay based on the results of our operation life test.
Test condition: 1 sec. ON / 1 sec. OFF.
Load Capacity Contact Life
20VA
0.2A/100VAC
3 million times
0.1A/200VAC
35VA
0.35A/100VAC
1 million times
0.17A/200VAC
80VA
0.8A/100VAC
2 hundred thousand times
0.4A/200VAC
The product life of relay contacts becomes considerably shorter than
the above conditions when the rush overcurrent is shut down.
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.
2) Lamp load
Lamp loads generally generate rush current 10 to 15 times the
stationary current. Make sure that the rush current does not exceed the
current corresponding to the maximum specified 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.
n CAUTIONS IN EXTERNAL WIRING
Protection circuit for load short-circuiting
When a load connected to the output terminal short-circuits, the printed
circuit board may be burnt out. Fit a protective fuse on the output
circuit.
Protection circuit of contact when inductive load is used
An internal protection circuit for the relays is not provided for the
relay output circuit in this product. It is recommended to use inductive
loads with built-in protection circuits. When using loads without built-in
protection circuits, insert an external contact protection circuit, etc. to
reduce noise and extend the product life.
1) DC circuit
Connect a diode in parallel with the load. Use a diode (for
commutation) having the following specifications:
Item Standard
Reverse voltage 5 to 10 times the load voltage
Forward current Load current or more
2) AC circuit
Connect the surge absorber (combined CR components such as a
surge killer and spark killer, etc.) parallel to the load. Select the rated
voltage of the surge absorber suitable to the output used. Refer to the
table below for other specifications.
Item Standard
Electrostatic capacity Approx. 0.1μF
Resistance value Approx. 100 to 200Ω
Interlock
Loads, such as contactors for normal and reverse rotations, that must
not be turned on simultaneously should have an interlock in the PLC
program and an external interlock.
Common mode
Use output contacts of the PLC in the common mode.
A
common number applies to the of [COM ].
AC power
supply
Load
Fuse
Y
COM
DC power
supply
Fuse
Y
COM
Load