Access protection
6
6.1
Bluetooth radio interface
Bluetooth PIN
Bluetooth PUK
Devices with a Bluetooth radio interface are protected against unwanted access from
outside. This means that only authorized persons can receive measured and status
values and change device settings via this interface.
A Bluetooth PIN is required to establish Bluetooth communication via the adjustment
tool (smartphone/tablet/notebook. This code must be entered once when Bluetooth
communication is established for the first time in the adjustment tool. It is then
stored in the adjustment tool and does not have to be entered again.
The Bluetooth PIN is individual for each device. It is supplied with the device in the
information sheet "
Device Bluetooth and Parameter Access Codes
"
. It can be
changed
by the user after the first connection has been established. If the Bluetooth
PIN has
not been entered correctly, a new entry can only be made after a waiting
period has
elapsed. The waiting time increases with each additional incorrect entry.
The Bluetooth PUK enables Bluetooth communication to be established in the event
that the Bluetooth PIN is no longer known. It can't be changed. The Bluetooth PUK
can be found in information sheet "
Device Bluetooth and Parameter Access Codes
. If
this document is lost, the Bluetooth PUK can be retrieved from your personal contact
person after legitimation. The storage and transmission of Bluetooth access codes is
always encrypted (SHA 256 algorithm).
6.2
Protection of the parameterization
The settings (parameters) of the device can be protected against unwanted changes.
The parameter protection is deactivated on delivery, all settings can be made.
user PIN
To protect the parameterization, the device can be locked by the user with the aid of
a freely selectable user PIN. The settings (parameters) can then only be read out, but
not changed. The user PIN is also stored in the adjustment tool. However, unlike the
Bluetooth PIN, it must be re-entered for each unlock. When using the adjustment app
or EDD, the stored user PIN is then suggested to the user for unlocking.
SITRANS LR140
Operating Instructions, 08/2020,
A5E50352144
21
