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Technical Documents

MX series, TYPE 4 Safety Light Curtains


The ISB MX series of Light Curtains are Type 4 Active Optoelectronic Protective Devices (AOPD).


Intended Application

Hazardous point, area and access protection at machines.

The devices comply with the requirements of the relevant (Type 4 acc. IEC 61496-1/2, Cat. 4 / PL e acc. to EN ISO 13849-1, SIL CL 3 acc. to EN 62061 / IEC 61508) and can be used in applications up to Cat.4 / PL e acc. to EN ISO 13849-1 and SIL 3 acc. to EN 62061 / IEC 61508.

Common features of MX 4100 and MX 4200 light curtains

Specific features of the MX 4200 light curtain

Some common applications:


  • IEC 61496-1:2012
  • IEC 61496-2:2006
  • EN ISO 13849-1:2008 + AC:2009
  • EN 62061:2005
  • IEC 61508 Parts 1-7:2010
  • IEC 60204-1:2009
  • EN 50178:1997
  • ANSI B11.19:2010
  • ANSI/RIA R15.06:1999


The MX series of light curtains are designed with multiple indicators to facilitate its use and indicate the status of the unit at any given time.

3 Bright LED indicators

  • Red/ green for status
  • Blue solid indicates active blanking mode
  • Blue flashing indicates muting
  • Yellow solid indicating Lock-out condition
  • Yellow Flashing for interlock condition is engaged
  • Each beam has its own red status indicator on the detector unit
  • Red Beam status indicators also designate the blanked out region by blinking

7 Segment dsiplay is turned on when required for additional information and system errors

MX - Display

Paremetrization/Teach-in Interface

All operational parameters of the MX4000 series of light curtains can be configured according to the specific requirements of the end users using the MX4000-PT unit. With this simple and reliable tool the user may program parameters for blanking, muting and other functions without the use of computers or additional software.

MX - Key

Model designation

M X 4 "M" "DC" - "H" - "C"


  • "M" (model) is 1 (basic) or 2 (advanced, blanking and muting capabilities)
  • "DC" (detection capability) is 14, 22, 30, 38 or 82 mm
  • "H" (protective field height) is 300, 450, 600, 750, 900, 1200, 1500 or 1800 mm
  • "C" (column) is SE (emitter) or SD (detector), (for single column systems)


MX4122 – 600 – SE (basic model, 22 mm detection capability, 600 mm protective field, emitter)

MX4230 – 900 – DE (advanced model, 30 mm detection capability, 900 mm protective field, detector)

MX - Multiple Sizes