External Wiring For Relay Output Type; Product Life Of Relay Contacts; Handling Of Relay Output - Mitsubishi Electric MELSEQ FX3S Series User Manual

FX Series Programmable Controllers
3S
User's Manual - Hardware Edition
12.1

External Wiring for Relay Output Type

This section explains "handling of relay output", "external wiring precautions" and "example of external
wiring".

12.1.1 Product life of relay contacts

12.1.2 Handling of relay output

1. Output terminal
One common terminal is used for 1 or 4 relay output points.
The common terminal blocks can drive loads of different circuit
voltage systems (for example,100 V AC and 24 V DC).
2. External power supply
Use an external power supply of 30 V DC or less or 240 V AC or less
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. 10 ms.
6. Output current
At a circuit voltage of 240 V AC or less
less (100 V AC or 200 V AC
When an inductive load is switched, connect a diode (for commutation) or a surge absorber in parallel with
this load.
DC circuit Diode (for commutation)
AC circuit Surge absorber
7. Open circuit leakage current
When the output contact is turned off, no current leaks.
*1. 250 V AC or less when the unit does not comply with CE, UL or cUL standards.
*2. UL and cUL standards approved at 120 and 240 V AC.
110
*1
*2
) can be driven.
→ For the life of the contact for switching an inductive load, refer to Subsection 14.4.2.
→ For the relay output specifications, refer to Subsection 4.4.1.
→ For product life of relay contacts, refer to Subsection 14.4.2.
, a resistance load of 2 A per point or an inductive load of 80 VA or
12 Output Wiring Procedures
12.1 External Wiring for Relay Output Type
Load
Y000
Fuse
24 V DC
COM0
Load
Y002
Y003
100 V DC
Fuse
COM2
*1
for loads.
Main unit