E L C O p e r a t i o n M a n u a l
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MN05003006E
2-8
Output Wiring
Relay Output Circuit Wiring
2
3
1
C0
4
MC1
MC2
6
9
3
2
7
8
5
Y0 C1 Y1 C2 Y2 Y3 Y4 Y5
MC2
MC1
6
10
1. Reverse-current protection diode, *1
2. Emergency stop
3. Fuse
4. Surge absorber (0.1uf ca100~120ohm resistor, *3
5. DC power Supply
6. Inductive load
7. AC power Supply
8. Incandescent lamp
9. External Mechanical Interlock, *2
10. Do not use this terminal
*1: The ELC does not have any internal protection circuitry on the relay outputs. For switching
DC inductive loads, a reverse-current protection diode should be installed in parallel with
the load. The relay contact life decreases significantly if this is not done.
The reverse-current protection diode needs to satisfy the following specifications.
- The diode is rated for maximum reverse voltage of 5~10 times the load voltage.
- The forward current is more that the load current
*2: Ensure all loads are applied to the same side of each ELC output, see the figureabove.
Loads which should NEVER simultaneously operate (e.g. direction control of a motor),
because of a critical safety criteria, should not rely on the ELC’s sequencing alone.
Mechanical interlocks MUST be fitted to all critical safety circuits.
*3: The ELC does not have any internal protection circuitry on the relay output. For switching
AC inductive loads, a surge absorber (0.1uF + “100ohm to 120ohm”) should be installed in
parallel with the load. The relay contact life decreases significantly if this is not done.
Besides protecting the internal circuitry of the ELC, a surge absorber decreases the noise
emissions to the load.
Transistor Output Circuit Wiring
MC1
MC2
2
3
1
C0 Y0
Y1 C2 Y2 Y3 Y4 Y5
4
7
5
C1
MC2
MC1
8
76
6
79
