Mitsubishi FX3UC SERIES User Manual page 186

FX Series Programmable Controllers
3UC
User's Manual - Hardware Edition
6.3.3 Handling of relay output
1. Output terminal
One common terminal is used for 1, 4 or 8 relay output points.
The common terminal blocks can drive loads of different circuit
voltage systems (for example, 200V AC, 100V AC and 24V
DC).
The FX -16EYR-T(-DS) has two COM terminals per 8
2NC
output points. Connect two COM terminals outside the
PLC so that the load applied on each COM terminal
becomes smaller.
2. External power supply
Use an external power supply of 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) for loads.
3. Circuit insulation
The PLC internal circuit and external load circuits are electrically insulated between the output relay coil and
contact. The common terminal blocks are separated from one another.
4. Display of operation
When power is applied to the output relay coil, the LED is lit, and the output contact is turned on.
5. Response time
The response time of the output relay from when the power is applied to the coil until the output contact is
turned on and from when the coil is shut off until the output contact is turned off is approx. 10ms.
6. Output current
At a circuit voltage of 240V AC or less (250V AC or less when the unit does not comply with CE, UL or cUL
standards), a resistance load of 2A per point or an inductive load of 80VA or less (100V AC or 200V AC) can
be driven.
When an inductive load is switched, connect a diode (for commutation) or a surge absorber in parallel with
this load.
DC circuit
AC circuit
7. Open circuit leakage current
Because there is no leakage current even while output contacts are OFF, the neon ball, etc. can be driven
directly.
180
→ For the life of the contact for switching an inductive load, refer to Subsection 6.2.2.
Diode (for commutation)
Surge absorber
6 Output Specification and External Wiring
6.3 Relay Output [FX2NC/FX0N/FX2N Extension Blocks]
Load
Fuse 24V DC
Load
Fuse 100V AC
Load
Fuse 100V AC
Y 0
Y 1
COM1
Y 0
Y 1
COM2
PLC
FX -16EYR-T(-DS)
2NC
Y 0
Y 1
COM1
COM1
PLC