KEYENCE SL-R12EX - Manual (Page 6)

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• The following conditions must be considered before installing muting devices (sensors, switches, etc.) to
carry out the muting function.
1. The muting function of the light curtain is only permitted during the nonhazardous portion of the
machine cycle.
2. Muting devices must not get active and the light curtain (SL-C Series) must not go to the muting state
even if a person inadvertently approaches the light curtain's detection zone.
• Setting the muting function and muting device configuration must be restricted to an extremely limited
number of the responsible personnel.
• Any personnel other than the responsible personnel must not easily change the position at which the
muting devices are installed. When the muting devices are moved, the procedure must require the
use of specialized tools and must be performed under the responsibility of the responsible personnel.
• Customers who carry out the muting function bear sole responsibility for complying with the require-
ments imposed on that function. KEYENCE makes no guarantee regarding damage arising from instal-
lation, orientation, usage, or maintenance not in accordance with what is described in this instruction
manual, or from the failure to follow all applicable legal regulations in effect in the country and region in
which the SL-R12EX is used.
• The muting lamp or the SL-R12D must be installed prior to carrying out the muting function on the SL-C
Series. The muting lamp or the SL-R12D must be installed at the location where it can always be clearly
and easily visible for the machine operators or the responsible personnel in case of normal machine
operation, setting or alignment for muting or maintenance, etc.
• If it is necessary to install 2 or more muting lamps in order to satisfy the above requirements, the muting
lamps must be installed so that they are connected in series to the LAMP terminal on the SL-R12EX
terminal block. The SL-R12D cannot be used with the other muting lamps simultaneously. Therefore,
the other muting lamps must be installed instead of using the SL-R12D.
4. Circuit Design and Wiring
• Always turn off the device power when performing electrical wiring.
• Follow electrical standards and regulations for the country or region in which the SL-R12EX is being used
when performing the electrical wiring. Only qualified persons should perform wiring.
• Do not place any cables or electrical lines used in wiring the SL-R12EX in the same duct as high-voltage
electrical or power lines or in parallel with such lines.
• The length of the cables from the blanking blind protection unit (SL-C08SB/SL-C16SB) transmitter and
receiver to the SL-R12EX must not exceed 30 m (98.43 ft.).
5. Testing and Maintenance
• Always perform testing in accordance with the test procedures after maintenance, adjustment, or calibra-
tion of the target machine or the SL-R12EX, and before the machine start-up.
• If the SL-C, SL-R11 or SL-R12EX does not operate properly when tested in accordance with the test
procedures established in this instruction manual, do not operate the machine.
• Periodically examine the machine to verify that all brakes, other stop mechanisms, and control devices
operate reliably and accurately in addition to checking for SL-C, SL-R11 and SL-R12EX.
• The responsible personnel must perform maintenance procedures as established in this instruction
manual at least once every six months to ensure safe device operation.
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