Technical Datasheet: Schmersal TV8S 335-11Z-M20 Safety Switch

Product Overview

The TV8S 335-11Z-M20 is a heavy-duty, thermoplastic-enclosed safety position switch manufactured by Schmersal. Classified explicitly as a Safety Component, this device is engineered for machine guarding networks, safety door interlocks, and precise position monitoring. It features a positive break mechanism on the NC contact, ensuring a reliable fail-safe operation even under mechanical stress or contact welding.

Technical Specifications

Key Identification

• Manufacturer:A. Schmersal GmbH & Co. KG
• Model Code: TV8S 335-11Z-M20
• Product ID (Material Number): 101155141
• Production Code/Batch: 21276377 M02 3B9
• Manufacturing Year: 2016
• Approvals & Certifications: cULus Listed (382E Ind. Cont. Eq.), CCC (A031155), CE Marked

Electrical Data & Utilization Categories

• Standard Compliance: IEC 60947-5-1
• Utilization Category: AC-15
• Rated Insulation Voltage ($U_i$): 500 V
• Rated Impulse Withstand Voltage ($U_{imp}$): 6 kV
• UL Contact Rating Code: A600, P300, Type 1

Contact Configuration & Wiring Layout

• Contact Scheme: 1 NO (Normally Open) / 1 NC (Normally Closed)
• Action Principle: Z (Snap action contact block)
• Positive Break: Supported ($\Theta$ symbol indicating positive break force for safety isolation on the NC path).

13 ─── ○   ○ ─── 14  (NO)          \  21 ─── ──Θ── ─── 22  (NC)

Model Code Breakdown (335 Series Structure)

Code Segment	Value	Description
TV8S	Actuator Type	Position switch with specific lever/plunger geometry
335	Housing Series	Standard compact thermoplastic enclosure format
11	Contact Layout	1 Normally Open (NO) / 1 Normally Closed (NC)
Z	Action Type	Snap-action contact behavior
-M20	Cable Entry	Metric M20 x 1.5 threaded process connection port

Environmental & Mechanical Features

• Ingress Protection Rating: IP67 (Dust-tight and fully protected against immersion effects).
• Enclosure Type: Glass-fiber reinforced, self-extinguishing thermoplastic.
• Connection Interface: Internal screw terminal block accessed via the M20 conduit entry at the base.