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3738-20

Electronic limit switch

PRODUCT
Limit switch

USAGE

  • On/off service
  • Challenging transit times
  • Safety-instrumented system
  • Challenging ambient conditions

ATTACHMENT TO

  • Linear actuator, single acting
  • Linear actuator, double acting
  • Rotary actuator, single acting
  • Rotary actuator, double acting

EXPLOSION PROTECTION

  • Without certification
  • Type of protection "Intrinsic safety"

COMMUNICATION

  • Not required

CONTROL LOOP

  • - - -

OPTIONAL SOLENOID VALVE

  • 3/2-way
  • 5/2-way
  • External

VALVE DIAGNOSTICS

  • Required

Special features

  • Electronic limit switch
  • Automation of on/off applications
  • Compact die-cast aluminum housing
  • Attachment to linear actuators according to IEC 60534-6 or SAMSON integral attachment
  • Attachment to rotary actuators according to VDI/VDE 3845
  • Proven operating scheme: menu-driven, on-site operation using one rotary pushbutton, display easy to read in any mounting position
  • Trouble-free integration into existing systems: NAMUR contacts (DIN EN 60947-5-6), 24 V DC solenoid valve, intrinsically safe version
  • Contactless, wear-free travel sensor
  • Powered over a two-wire system solely by the NAMUR signal
  • Automatic initialization
  • Easy-to-read display with rotatable reading direction, LED for solenoid valve status
  • Communication interface for convenient configuration and documentation
  • Certified safety, use in safety-instrumented systems according to IEC 61508
  • Diagnostic functions: partial stroke test (PST), movement counter, operating hours counter, dead time and transit time measurement

Accessories

Options

  • Version with solenoid valve (3/2- or 5/2-way)

Information

  • WA 333

    Special Print: Safety in the Process Industry
    [EN][DE]
  • WA 331

    Brochure: Valve Accessories
    Limit Switches · Solenoid Valves · Pneumatic Lock-up Valves · Supply Pressure Regulators · Volume Boosters · Quick Exhaust Valves · Applications
    [EN][DE]
  • WA 284

    Special Print: Control Valve Diagnostics in Safety-instrumented Systems
    A Comparison of Architectures
    [EN][DE][NL]
  • WA 280

    Brochure: Electronic Limit Switches for On/off Valves
    [EN][DE][ES]
  • WA 227

    Flyer: Smart Valve Monitor
    Type 3738 Electronic Limit Switch
    [EN][DE][BR][ES][FR]
  • T 8390

    Type 3738-20 Electronic Limit Switch
    With optional solenoid valve
    [EN][DE]
  • T 8350

    Information Sheet of Valve Accessories
    Positioners · Limit Switches · Solenoid Valves · Valve Accessories
    Selection and Application
    [EN][DE]

Support

  • KA 8390

    Elektronischer Grenzsignalgeber Typ 3738-20
    [DE]
  • EB 8390

    Type 3738-20 Electronic Limit Switch
    with optional integrated solenoid valve for on/off valves
    [EN][DE][RU]
  • SH 8390

    Type 3738-20 Electronic Limit Switch
    with optional integrated solenoid valve for on/off valves
    [EN][DE]

Certificates

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