Samsomatic – Model Type 3776 – Limit Switch



The Type 3776 Limit Switch issues an electrical signal when an adjusted limit value is exceeded or not reached. The signal is suitable for reversing control signals, generating visual and audible alarms, or for connection to central control and alarm systems. The limit switch can be equipped with a solenoid valve for controlling the monitored actuator.

The Type 3776 Limit Switch offers a variety of different contacts, switching functions, connections, and mounting kits for all desired applications:


  • Electrical connection using a cable gland M 20 1.5 to terminals or using a plug-type connector
  • Internal AS-Interface module with bus connection (optional)
  • Corrosion-resistant, rugged enclosure with degree of protection IP 54 or IP 65 for applications in aggressive environments
  • Maximum permissible ambient temperature 45 to 80°C, depending on the components and the type of protection
  • Mounting kits for linear actuators or rotary actuators with interface according to VDI/VDE 3845


  • Maximum 3 easily and accurately adjustable contacts
  • Inductive pick-ups, inductive double proximity switch, or electric microswitches

Solenoid Valve

  • Safety Integrity Level SIL 4 according to IEC 61508
  • 1 or 2 integral pilot valves for single or double actuation of a booster valve
  • e/p binary converter with proven flapper/nozzle assembly
  • Type of protection II 2G Ex ia IIC T6 or II 3G Ex nA II T6 (optional)
  • Nominal signals 6/12/24 V DC or 24/115/230 V AC
  • Power consumption 6 to 27 mW or 0.04 to 0.46 VA, depending on the nominal signal
  • Manual override (optional)
  • Air supply 2.2 to 6.0 bar
  • Flanged booster valve with diaphragm or piston
  • 3/2, 5/2, or 5/3-way function
  • KVS 0.2 to 0.3
  • Restrictors for adjusting different closing and opening times(optional)
  • Threaded connection G 1/4 or 1/4 NPT
  • Flanged connection block for actuation of an external Type 3756 Booster Valve G 1/4 or 1/4 NPT
  • Threaded connection G 1/4 or 1/4 NPT


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