Schmersal TR 236-11Z-M20 Industrial Safety Relay Module

Schmersal TR 236-11Z-M20 is a 1 NO / 1 NC roller-plunger safety switch from the TR series, housed in a glass‑fibre reinforced thermoplastic enclosure with a single M 20 x 1.5 cable entry. It measures 30 mm x 58.5 mm x 30 mm and weighs 55 g, is double‑insulated, and mounts to EN 50047 with actuator heads that can be repositioned by 4 x 90°. The device supports a wide range of actuators and provides one auxiliary contact and one safety contact, delivering a normally closed safety output (B10D) rated for 20,000,000 operations. Its safety and construction standards include EN IEC 60947-5-1 and EN ISO 13849-1, with approvals such as cULus and CCC. The TR 236-11Z-M20 specifies a minimum actuation force of 9 N, a minimum positive break force of 19 N, and actuation speeds from 120 mm/min to 1 m/s, reflecting its suitability for reliable operator‑actuated safety circuits in machinery. The mission time is specified at 20 years, underscoring a long‑life design for safety interlock applications.