Keyence SJ-M201 User Manual download pdf (Page 12)

4-1 About Maintenance

Maintenance must be performed periodically to ensure that the static elimination performance of the

SJ-M Series is maximized. Maintenance personnel should thoroughly read the descriptions under

"Safety Information for SJ-M Series" ( page 1), and perform maintenance according to the

following points.

About Maintenance

When the SJ-M Series is used for a long period of time, the electrode probe may become dirty due to

the adhesion of dust and dirt.

If the ion level alarm indicator lights, clean the electrode probe. If the electrode probe is used in a dirty

or dusty state, static elimination performance can no longer be fully achieved, resulting in accidents or

malfunction. We recommend periodically cleaning the electrode probe (as a guideline, once every two

weeks in a regular operating environment, though this depends on the installation conditions).

If cleaning the electrode probe does not improve the static elimination performance, or the ion level

alarm indicator frequently lights, replace the electrode probe.

• The SJ-M Series uses high voltage. Before starting maintenance, be sure

to turn the power OFF. Failure to do so might result in electric shock or

malfunction.

• Do not directly touch the electrode

probe. Take care not to touch these

probes even if the power is turned OFF.

Directly touching these probes may

cause personal injury.

CAUTION

4-2

Performing Maintenance on the Electrode probe

When the SJ-M Series is used for a long period of time, the electrode probe becomes dirty due to the

adhesion of dust and dirt.

If the electrode probe is used in a dirty or dusty state, static elimination performance can no longer be

fully achieved, resulting in accidents or malfunction. Be sure to periodically perform maintenance on

the electrode probe.

Performing Maintenance on the Electrode probe

■ How to clean the electrode probe

Clean the electrode probe gently with a cotton swab

moistened with alcohol.

■ How to replace the electrode probe

Note: If cleaning the electrode probe does not improve static elimination performance, or the ion level

alarm indicator frequently lights, a probable cause is that the electrode probe has reached the end of

its service life.

Electrode replacement units for SJ-M021 (OP-51607) and for SJ-M021G (OP-75351) are available as

options.

● How to remove and install the electrode probe

The electrode probe can be removed by holding the tip of

the electrode probe and turning counterclockwise, and

installed by turning clockwise.

•

Before removing the Electrode Unit, turn the SJ-M Series OFF.

•

Do not directly touch the electrode probe with your hands. Doing so may

cause personal injury. Pay attention to this when performing maintenance

on the electrode probe.

CAUTION

When replacing the electrode, install the electrode holding the thicker resin

section of the Electrode Replacement Kit.

Important

5-1 Timing Charts

This section provides timing charts for SJ-M Series.

■ Ion generation control timing chart

Indicator states when static elimination is OFF

Normal static elimination OFF

<during static elimination stop

input (terminal)>

The center LED of the ion monitor blinks (red).

■ Input response timing chart

Normally ON Normally OFF Normally ON Forced OFF Normally ON Normally OFF Normally ON

Static elimination

stop input (terminal)

OFF

Static elimination

stop input (controller)

OFF

Ion emission state

Unit indicator

Emitting

No emissions

Alarm output

OFF

Forced OFF Forced OFFNormally ONNormally OFF

Max. 15 ms Max. 1 s

Static elimination

stop input (unit)

OFF

High voltage output

Emitting

No emissions

Normal static elimination OFF <during

static elimination stop input (controller)>

The three center LEDs of the ion monitor

blink (red).

5-1

Timing Charts

■ Ion level alarm output timing chart

■ Condition alarm output timing chart

■ Alarm output timing chart

Power

OFF

Static elimination

stop input (terminal)

OFF

Static elimination

stop input (controller)

OFF

Alarm indicator

Blinking

OFF

Alarm output (N.C.)

OFF

Ion emission

Emitting

No emissions

Ion level indicator

Max. 10s

Blinking

OFF

Ion level alarm

output (N.O.)

OFF

When the ion level alarm is output,

removing the cause of the alarm can

restore the normal state. One way of

restoring the normal state is to

perform maintenance on the electrode

probe.

For details on electrode probe

maintenance, see "Performing

Maintenance on the Electrode probe"

( page 12).

Power

OFF

Alarm indicator

Blinking

OFF

Alarm output (N.C.)

OFF

Ion emission

Emitting

No emissions

Condition indicator

Blinking

OFF

Condition alarm

output (N.O.)

OFF

Max. 10s

Static elimination

stop input (terminal)

OFF

Static elimination

stop input (controller)

OFF

When the condition alarm is output,

removing the cause of the alarm can

restore the normal state. One way of

restoring the normal state is to

improve the installation environment.

Power

OFF

Static elimination

stop input

OFF

Alarm indicator

Blinking

OFF

Alarm output (N.C.)

OFF

Ion emission

Emitting

No emissions

Max. 10 s

When the alarm is output, the normal

state can be restored by performing

one of the two available restore

methods depending on the cause of

alarm output.

For details on how to restore the

normal state, see “During an alarm

(levels 1, 2)” ( page 15).

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Keyence SJ-M201 User Manual Page 12

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