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STEP 551 Motor lock

STEP 551 Motor lock

STEP 551 Motor lock

STEP 551 is a strong motor lock built to withstand heavy use. The lock case is made of stainless steel with modern bolt placement with the hook bolt placed in the center of the lock case. It is designed for door environments with the toughest intrusion protection requirements, while also withstanding a high opening frequency. STEP 551 can be used as a night lock or as an extremely secure day lock.

Strong and manipulation-protected hook bolt

The hook bolt is exceptionally strong, with a breaking strength of 56 kN (5,600 kg). A manipulation protected barrier automatically blocks the hook bolt upon locking, while an indicator detects the bolt’s position. This ensures that you can trust the door is truly locked.

For door environments with the highest security requirements

  • Certified for burglary protection in Class 5 acc. to SSF 3522.
  • Certified for burglary protection in Grade 7 acc. to EN 12209.
  • Approved for use in lock systems for many security doors in class RC3 and RC4.
  • Includes panic locking function.

With unique FreeDrive®

The FreeDrive® technology enables the locks motor and gearbox to disengage every time the door unlocks mechanically. This means that the wear minimizes when using lever handle, knob, keys or emergency exit device. Locks with FreeDrive® are therefore ideal for use with STEP Exit on emergency exit doors and can be operated thousands of times daily.

For door environments with fire requirements

Certified in fire technical class E/EI120 acc to. EN 14846 in combination with a latch lock.

For door environments with evacuation requirements

Certified for evacuation acc to. EN 179. Go to the Exitguide to find emergency devices for STEP 551.

Control unit with many smart features

ST500C control unit uses encrypted OSDP AES-128 communication for locking, unlocking and status signals. It can manage up to two motor locks, which can be controlled individually or synchronized.

The control unit has multiple selectable AUX outputs and supports features like re-locking or re-entry.

Swedish premium quality

All our products are developed and manufactured by us in Sweden. Maximum functionality and operational reliability are features we never compromise on. By choosing STEP, you not only support Swedish technology and industry – you also choose premium-quality products that ensure long-term reliability.

Powerful and fast motor lock for doors with high-security requirements

STEP 551 is one of the most secure motor locks on the market. It is a fast and powerful lock equipped with smart FreeDrive® technology. It can combine fire and evacuation requirements with the highest intrusion protection requirements and can also be placed in high-frequency used door environments.

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Powerful and fast motor lock for doors with high-security requirements

STEP 551 is one of the most secure motor locks on the market. It is a fast and powerful lock equipped with smart FreeDrive® technology. It can combine fire and evacuation requirements with the highest intrusion protection requirements and can also be placed in high-frequency used door environments.