Wiring and Connections | Section | |
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Inductive Loads
When connecting an inductive load to an input, connect a surge protector or diode in parallel with the load.
The surge protector’s components should have the following ratings:
Relay Output
OUT 
CPM1A
Surge protector
COM 
Relay Output
Transistor Output
(Sink Type)
CPM1A
Relay Output
Transistor Output
(Source Type)
CPM1A
OUT |
Diode |
COM |
OUT |
Diode |
COM |
Crimp Connectors
! Caution
The diode should satisfy the following requirements:
Peak
Inrush Current Considerations
When switching a load with a high inrush current in the CPM1A relay output or transistor output model, such as an incandescent lamp, suppress the inrush cur- rent as shown below.
Countermeasure 1 | Countermeasure 2 |
| R |
OUT | OUT |
R |
|
COM | COM |
Providing a dark current of | Providing a limiting resistor |
approx. |
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value through an incandescent |
|
lamp |
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Fuse Insertion
The CPM1A with transistor output may burn if the load is
Always use crimp connectors for the CPM1A’s power lines and I/O lines or else use a solid wire (instead of a stranded wire). Do not connect bare stranded wires directly to terminals. Bare stranded wires connected directly to the terminal can cause a fire.
Use M3 terminal screws and tighten the screws securely (0.5 N S m).
Fork terminal | Ring terminal |
6.2 mm max. | 6.2 mm max. |
The recommended wire size for solid wires is 0.4 to 1.2 mm (AWG26 to AWG18).
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