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FX3U Series Programmable Controllers
12 Output Wiring Procedures
User’s Manual - Hardware Edition
12.2
12.2 External Wiring for Relay Output
External Wiring for Relay Output
This section explains the relay output specifications (main unit) and external wiring.
• For the main unit, refer to Subsection 12.2.1 "Output specifications (main unit)", Subsection 12.2.3
"Handling of relay output", Subsection 12.2.4 "Cautions on external wiring" and Subsection 12.2.5
"Example of external wiring" in this section.
• For the input/output powered extension units/blocks, refer to Subsection 12.2.3 "Handling of relay output"
and Subsection 12.2.4 "Cautions on external wiring" in this section. For their specifications and examples
of wiring, refer to the specification for each model.
→ For the specifications on the input/output powered extension unit, refer to Chapter 15.
→ For the specifications on the input/output extension block, refer to Chapter 16.
12.2.1 Output specifications (main unit)
Relay output specifications
Item
FX3U-16MR/
S
FX3U-32MR/
S
FX3U-48MR/
S
FX3U-64MR/
S
FX3U-80MR/
S
FX3U-128MR/
ES
Number of output
points
8 points
16 points
24 points
32 points
40 points
64 points
Output connecting
type
Fixed terminal
block
(M3 screw)
Removable terminal block (M3 screw)
Output form
External power
supply
Relay
30V DC or less or 240V AC or less
(250V AC or less when the unit does not comply with CE, UL or cUL standards)
2 A/point
The total load current of resistance loads per common terminal should be the following
value.
→ For details on the common terminal for each model,
Resistance
refer to the terminal block layout.
load
• 1 output point/common terminal: 2 A or less
Max. load
• 4 output points/common terminal: 8 A or less
• 8 output points/common terminal: 8 A or less
80 VA
→ For the product life, refer to Subsection 12.2.2.
→ For cautions on external wiring, refer to Subsection 12.2.4.
Inductive
load
Min. load
5V DC, 2mA (reference value)
Open circuit leakage
current
−
Response OFF ON
time
ON OFF
Approx. 10ms
Approx. 10ms
Circuit insulation
Mechanical insulation
Display of output
operation
LED on panel lights when power is applied to relay coil.
Load
DC power
supply
Output circuit
configuration
Fuse
Load
External
power supply
Fuse
Y
COM
Y
COM
A common number applies to the
of [COM
].
Number of output points per common terminal
• On FX3U-16MR/ S, one common terminal is used for one output point.
• On models other than FX3U-16MR/ S, one common terminal is used for four or eight output points.
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