Lock C for USM Haller

With the new electromechanical lock C and the specially developed USM app, storage space and lock management take on a whole new dimension. Thanks to its dual technology (RFID & Bluetooth), the lock can be operated easily using a key card or a smartphone, via the intuitive, user-friendly app.

Connectivity – up to three user modes offer a variety of new applications


Thanks to its three user modes, the lock C is ideal for meeting different and changing requirements.

For more information, download the below.

Public Locker mode


A row of lockers is available to several users – they simply choose a free locker and lock it using the card or the app. Ideal for temporary usage in open spaces, for desk sharing or as a cloakroom in reception areas.



Personal Locker mode


The same locker is assigned to a certain person for a long time. As such, the locker owner can safely store their personal and confidential documents there.



Shared Locker mode


If one person is absent, access to the locker can be shared with selected individuals. For teams or project groups, one locker can be used as a shared storage location.

Easy retrofitting


As with all USM system parts, the new lock C can be retrofitted into your existing USM furniture in keeping with the backward compatibility principle. The existing handle or lock handle can simply be replaced with the new lock C without having to replace the whole door.






Cleverness – high-tech in a simple design


The lock C combines electronics and mechanics, both produced to the usual highest quality. Compact and in line with the timeless aesthetics of the design classic.

Clear and simple management


With keys it’s always the same – you wonder where you last put them … or which key goes with which locker … and how to organise the management of lockers and their keys among employees…

The USM app gives users a clear overview and is easy to use. For the administrator, it serves as an intuitive tool not only for organising the locks, but also for keeping an eye on the battery level, updates and log files.




USM Haller Lock C


Lock C is an electromechanical lock comprising the following components: a motor-driven lock mechanism, the mechanics, the battery supply, a circuit board with all electronic components and an antenna, LEDs for flashing signals, and a radio-permeable cap.

Ø 43 mm × 34 mm
(diameter × height)

Radio frequency
RFID 13.56 MHz
Bluetooth 2.4 – 2.4835 GHz

Power supply
2 × ½ AA batteries, 3 V e.g. of the “Varta” brand with 950 mAh
Already included in lock C on initial purchase.
Service life: 15,000 locking cycles or 2 years





Power User Kit


The Power User Kit contains all of the product parts you need to start-up and maintain your lock C. USM recommends having one Power User Kit per site.

1x Main Admin card
3x Admin card
1x Key card
1x Service tool













USM Haller lock C start up


A lock C needs to be put into service before it can be used. This video shows you the simple start-up steps. Take your time to follow these steps carefully.






USM Haller lock C battery change


This video shows you how to change the batteries. They can easily be replaced from the outside in just a few steps. At the same time, the lock C remains locked and the contents securely stored.






Where should I keep the Main Admin card and the other accessories?


USM recommends that you, the Power User, keep these items in safe custody, preferably in a safe or something similar.
As this card cannot be replaced, you should choose the safest possible storage location. You and the assigned card holders should keep the Admin cards in a safe place to prevent them from being used by unauthorised persons. Keep any accessories in the Power User kit so that al I of the product parts remain together.


Can Grants be distributed remotely?


Yes, Grants can be sent remotely. The user needs a user account. The Grants are displayed to the user upon receipt.


Can I change the batteries when a locker is closed?


Yes, you can because the batteries are changed an the outside. This does not affect the programming and the lock remains locked if it was closed before the battery change.


Can the lock C be reset to factory settings?


No, but thanks to its smart implementation the USM Haller lock C offers various solutions if your requirements change or a user loses his/her card, etc.

1. If a user loses his/her key card or an employee forgets his/ her smartphone, the Power User can carry out an emergency opening using his/her Admin card or smartphone.

2. You also have the option of deleting Admin cards from a lock and linking new Ad min cards to it, even if an Admin card is misplaced.

3. The Power User can pass an his/her admin rights.

All programmings and saved cards can be deleted, except for the Main Admin card, which remains saved. Ta reset this card, the lock needs to be sent back to the factory.




Why does USM recommend programming three Admin cards per lock?


In case an Ad min card gets lost or to carry out an emergency opening if the Power User isn't an site. Furthermore, the locks can be divided into different areas of responsibility by allocating different Admin cards.


Can the service tool be kept together with the cards?


Yes, the service tool with its integrated magnet and the RFID cards can be stored together.


Why does my lock C make noises when l'm not even using it?


Lock Cs regularly move their gear unit to keep the mechanical lock components in good working order. During these movements, a locked lock C always remains locked and an open one remains open. lf the lock is operated an a regular basis, i.e. it is opened or locked within 24 hours, these extra movements are no langer necessary.


Can I be logged into the same Power User account on several smartphones and carry out firmware updates simultaneously?


Yes, you can.


Why was the firmware update aborted?


When carrying out an update, make sure that your smartphone is always within 2 metres of the lock and that it doesn't go into sleep state.


Which operating systems are supported?


The USM app supports the following operating sys­tems: iPhone iOS 13 and above or Android 7 and above.


How can I reload processes in the USM app?


Swipe your thumb from top to bottom of the screen. This reactivates the connectivity and can therefore speed up processes.