Iai-america ERC2 Manual de usuario descargar pdf (Pagina 34)

1. Overview

(2) Noise sources and elimination

Among the numerous noise sources, solenoid valves, magnet switches and relays are of particular concern

when building a system. Noise from these sources can be eliminated by implementing the measures specified

below.

[1] AC solenoid valves, magnet switches and relays

Measure: Install a surge absorber in parallel with the coil.

[2] DC solenoid valves, magnet switches and relays

Measure: Install a diode in parallel with the coil. Determine the diode capacity in accordance with the load capacity.

In a DC circuit, connecting a diode in reverse polarity will damage the diode,

internal parts of the controller and/or DC power supply, so exercise due

caution.

m Point

Install a surge absorber to each coil over a minimum wiring length.

Installing a surge absorber to the terminal block or other part will be

less effective because of a longer distance from the coil.

Surge absorber

Diode

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Iai-america ERC2 Manual de usuario Pagina 34