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Estimated delivery start: Q2 2025.

Motor lock STEP 352S-DN

– with real Day and Night function that ensures class 3 at night and class 2A, 2B and evacuation acc. to EN 179:2008 on the day

STEP 352S-DN is developed with world-leading Swedish technology. It is a motor lock with an extremely fast, motor-controlled locking and unlocking of the hook bolt and automatic latch bolt. A unique, patent-pending Day and Night function allows you to ensure class 3 at night and class 2A, 2B and evacuation acc. to EN 179:2008 on the day. The automatic latch bolt enables opening with door automation.

 

Now we are redefining the concept of Day and Night

The STEP 352S-DN is no ordinary Day and Night lock. It is a brand new innovation that completely redefines the concept.

Thanks to our patent-pending Day and Night function, you meet class 2A, 2B and evacuation acc. to EN 179:2008 on the day. When the building is emptied for the evening, the lock’s split function can be blocked and the night mode can be activated, which meets the insurance companies’ requirements for an “approved locking device”. With a quick, powerful hook bolt that is always locked, even during the day, the lock meets class 3 at night.

In this way, you can therefore create an incredibly cost-effective door environment where the traditional solution, with one day lock and one night lock, can now be replaced by a single powerful motor lock!

It’s a true Day and Night function – as it should be.

For high-frequency door environments

At the same time, the lock is designed to be used in high-frequency door environments and can handle several million openings, which also happen as quickly as an electric strike plate.

Thanks to these characteristics, the STEP 352S-DN is an optimal choice for door environments in all types of businesses that are emptied at night, but are frequently used, and by many people during the day.

Estimated delivery start: Q2 2025.

 

Experience a real Day and Night function – the way it should work

⇒  The built-in split function means that you can open the door with lever handle from the interior side. Alarm bypass allows you to obtain an “approved passage” from the interior side of the door.

⇒  When the building is emptied for the evening, the lock’s split function can be blocked and the night mode can be activated, which meets the insurance companies’ requirements for an “approved lock unit”. The control of disconnected night mode must be coordinated with a function essential to the operation, e.g. main lighting.

⇒  This means that you can ensure class 3 at night and class 2A, 2B and evacuation acc. to EN 179:2008 on the day.

⇒  At the same time, the split function ensures that evacuation cannot be blocked by the lever handle on the exterior side.

Unique automatic latch bolt enables opening with door automation

STEP 352S-DN is equipped with STEPs unique automatic latch bolt.

When the door opens electrically, the automatic latch bolt can fold which enables the door to be opened with door automation. Directly after the door is opened, the automatic latch bolt extends out and anchors itself in its original position, functioning again as a classic latch bolt.

STEP 352S-DN is therefore the obvious choise in door environments where you want increased accessibility.

Choose whether the lock should fit a right-hung or left-hung door.

Very high operational reliability

The automatic latch bolt can handle a high preload of 80 kg, which ensures a very high operational reliability. For door environments with fire requirements Certified in fire technical class E/EI120 according to EN 14846:2008.

For door environments with fire requirements

Certified in fire technical class E/EI120 according EN 14846:2008.

Manipulation protected block function

The lock has a double blocking, where the blocking of the hook bolt also is blocked by a latch. The latch position is read by an optical sensor so you can trust that it is really locked. The latch is completely protected from access and thus ensures protection against manipulation.

FreeDrive®minimizes wear during mechanical use

The FreeDrive® technology enables the locks motor and gearbox to disengages 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® used together with STEP Exit on doors with emergency exits can therefore be used thousands of times every day.

Control units with smart features

ST500C

  • ST500C uses encrypted communication OSDP AES-128 for locking, unlocking and status indications.
  • Handles up to two motor locks for connection to access system, alarm and central function. These can be controlled individually or synchronized for connection to access control systems, alarms and essential function.
  • Handles re-entry.

 

Read more about STEP control units

Fire approved: E/EI120
Certificates
  • Certified in Class 3 according to SSF 3522 at night.
  • Certified in Class 2A , 2B according to SSF 3522 at daytime.
  • Certified for evacuation according to EN 179:2008.
  • Certified in fire technical class E/EI120 according EN 14846:2008.
  • Certified in Grade L for corrosion, temperatures and humidity, which corresponds to high requirements according to EN 14846.
Product characteristics
  • Unlocks in less than 0.1 second.
  • Modern bolt placement.
  • With STEPs unique automatic latch bolt.
  • FreeDrive® technology.
  • Manipulation-protected block function.
  • Back set 50 mm.
  • Encrypted communication OSDP AES-128.
  • Evacuation and re-entry are ensured with STEP Exit emergency exit devices.
  • Built in split-spindle
  • Designed to be used in high frequency doors.
Status indicators for
  • Bolt locked
  • Bolt open
  • Lock alarm
  • Door open/closed
  • Exit alarm
  • Programmable AUX outputs. Choose from the following:
    • Vital open (door open)
    • Vital closed (door closed and locked)
    • Service
    • Tamper
    • Exit alarm
    • Door alarm
    • Timer failed
    • Timer unlocked
    • Timer locked
    • Door auto (activation of door automation after unlocking)
    • By-pass function for “Approved passage” on lever handle on the interior side.
Environment
  • The control unit can handle temperatures from -5 to +70 degrees.
  • The lock can withstand temperatures from -20 to +70 degrees.
Article number E-nr Description
ST352S-DN-R STEP 352S-DN Motor lock. Incl. ST352S-DN-R, 10 m connection cable ST0916H, STEP square spindle ST1088-50, STEP square spindle ST1088-57, drill protection ST1199, magnetic contact ST0910, screw and connector set ST1192.
ST352S-DN-L STEP 352S-DN Motor lock. Incl. ST352S-DN-L, 10 m connection cable ST0916H, STEP square spindle ST1088-50, STEP square spindle ST1088-57, drill protection ST1199, magnetic contact ST0910, screw and connector set ST1192.
Power consumption STEP 352DN
  • Voltage: 10-30 V AC/DC.
  • Power consumption 1 lock: 69 mA at rest,
    when unlocking/locking 170 mA.
  • Power consumption 2 locks: 86,6 mA at rest,
    when unlocking/locking 385 mA.
Dimensional drawing STEP 352DN

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