Encryption; Authentication; Coexistence - WAGO I/O-SYSTEM 750 Manual

42 Function Description
Regardless of the operating mode, a connection is only possible when the security
settings of the I/O module and those of the remote Bluetooth
compatible.
Use authentication and encryption for compatibility!
Many Bluetooth
maximum compatibility, the I/O module should in turn be set to force authentica-
tion and encryption.
5.2.7

Encryption

The 750-644 I/O module supports both encrypted and unencrypted connections.
5.2.8

Authentication

The 750-644 I/O module supports connections with informal or no authentication
or with secure authentication.
5.2.9

Coexistence

The 750-644 I/O module allows coexistence of other wireless networks through
adaptive frequency hopping (AFH) according to the Bluetooth
automatically detects occupied frequency ranges of other wireless networks. The
detected frequency ranges are automatically avoided by the 750-644 I/O module.
The 750-644 I/O module reads the avoided frequency ranges in the form of a
channel blacklist, i.e. a list that includes the 79 possible channels currently
excluded from its own transmissions. Based on the channel blacklist, it is also
possible to draw conclusions about other wireless networks or interference in the
frequency band.
The 750-644 I/O module supports automatic adjustment of the transmission power
according to the Bluetooth
the received signal strength is higher than needed, the I/O module automatically
reduces its transmission power. Likewise, the 750-644 I/O module automatically
increases its transmission power if a remote device tells the I/O module that the
received signal strength is too low.
The configuration of the 750-644 I/O module allows the user to set upper limits
for automatic adjustment of the transmission power. The lower the transmission
power, the smaller the distance at which other Bluetooth
data. Adjusting the transmission power can be used to increase security or to
improve transmission quality in other wireless networks.
Two upper limits can be defined:
Default transmission power:
•
This value determines which transmission power the I/O module uses for a
device scan or when establishing a connection or shortly after establishing a
®
devices are set up to only allow secure connections. To achieve
®
standard. If a remote devices tells the I/O module that
WAGO-I/O-SYSTEM 750
750-644 Bluetooth
®
devices can receive
Version 2.0.0, valid from FW/HW Version 03/03
®
RF-Transceiver
®
device are
®
standard. AFH
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