Text version of the page 
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Series ES 51, actuators
Features/Options Features/Options-Actuating speed 0.5 m/s with an actuating angle of 30°
-Metal roller
-Actuator heads can be repositioned by 4 x 90° -Large actuating surface-Safe switching even with imprecise actuation-Suitable for manual operation-Collar to protect against the entry of foreign bodies
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Cover WK
Position switches with safety function
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Roller plunger R
54 Contact variants: switch travel/contacts Contact variants: switch travel/contacts Slow action Slow action 1 NC / 1 NO contact ES 51 WK 1Ö/1S 1 NC / 1 NO contact ES 51 R 1Ö/1S