Features

Mute Module

Provides muting controls for up to two Safety Light Curtains.

  • Type 4 safety product, when used in combination with a Type 4 safety light curtain
  • Provides muting controls for up to two light curtains
  • Two independent PNP safety outputs
  • NPN & PNP auxiliary outputs

Overview

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  • 100 mm DIN box enclosure
  • Removable terminal blocks
  • DeviceNet option
  • Diagnostic Display
  • Compatible with F3SJ, MS4800, PA4600, and OS32C

Muting

The term “Muting” is defined as bypassing the protective function of the safety light curtain and is only permitted by ANSI B11.19 during the non-hazardous portion of the machine cycle.

Machine controllers which initiate muting must be designed for control reliability. The ANSI B11.19-2010 standard explains the muting requirements:

“Muting of the device shall be permitted during the nonhazardous portion of the machine cycle. Muting of the device shall be accomplished in such a manner that no single component failure shall prevent the normal stop command and shall prevent subsequent machine cycles until the failure is corrected. If the machine tool has reversing capability where a muting hazard is possible, the control [system] shall include an automatic means through which the muting is only permitted in the forward direction.” [Section 4.2.3.3.7]

Using Muting

Use of a muting function requires special precautions by the safety system machine controller, installer, operator and employer. The proper installation, checkout, and operation of a machine and muting system is critical to the safe operation of the machine. The following is only a partial list of requirements when utilizing muting and is not intended to be a complete guide to muting standards. The employer must contact the local safety authority for specific requirements regarding the machine, machine controller and safety related control system. Omron provides the following information for users reference only and makes no claim regarding the accuracy, completeness or effectiveness for a specific application from any organization:
  • Muting of the light curtain is only permitted during the nonhazardous portion of the machine cycle.
  • If the machine tool has reversing capability where a muting hazard is possible, the control system shall include an automatic means through which muting is only permitted in the forward direction.
  • A muting system must make use of two, three, or four PNP (24 VDC sourcing) sensors. A single sensor, either mechanical or photoelectric, cannot be used in place of the required multiple sensor system.
  • The muting position (of the mute signal source) shall be secured against unauthorized adjustment by provision of special tools, key entry, electronics passwords and the positioning and the fixing of associated limit switches.
The above requirements were compiled from the following sources: ANSI B11.19-2010, prEN692-1994 and prEN50100-1-1993. Other standards may exist for your specific application. Contact your local safety authority and machine supplier for further information.

Input Signal

  • Input Power +24 VDC
  • Two independent channels, each channel is comprised of one light curtain and up to four mute sensors
  • Start
  • EDM (MPCE monitoring)
  • Mute enable

Output Signals

  • Two independent PNP safety outputs
  • NPN & PNP auxiliary outputs
  • Mute lamp drivers (2)
  • Mute auxiliary (NPN)
  • Mute armed (NPN)

Indicators

  • Diagnostic display
  • Machine Run
  • Machine Stop
  • Interlock
  • OSSD input active (light curtains)
  • Sensor input active (sensors)
  • Mute Enable active