Explanation Of The Interfaces - Bartec BCS 3600ex Series User Manual

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Explanation of the interfaces

USB HID (Human Interface Device)
-
The digital scanner establishes a connection to the base station or PC / host via Bluetooth
and functions like a keyboard.
USB (Universal Serial Bus) is also a serial bus. The data transfer takes place via 2 lines (D+
and D-). Two further lines serve the power supply of the connected devices.
USB SPP (Serial Port Profile)
-
Der digitale Scanner stellt über Bluetooth eine Verbindung zur Basisstation oder Universal-
Versorgungsmodul oder PC / Host her und fungiert als serielle Verbindung.
RS232 (Recommended
-
The digital scanner establishes a connection to the base station or USM or PC / host via
Bluetooth and functions as a serial connection.
In automation technology, only three lines are usually used from the RS-232 interface.
TxD (Transmit Data) for transmitting
RxD (Receive Data) for reception
GND cable for the common reference potential
There is no data transmission without connection of the GND line.
The RS-232 interface is not bus-capable and can only be used for point-to-point connections.
Functionally ranges up to 15m are possible.
RS422 (Recommended
-
The digital scanner establishes a connection to the base station or universal power supply
module or PC / host via Bluetooth and functions as a serial connection.
Data transmission is via a four-wire line.
All participants transmit via the data lines TxD+ and TxD- and receive via RxD+ and RxD-.
The GND line is only to be used for large potential differences and should not be absolutely
necessary.
The RS422 interface is less sensitive to interference than the RS232 interface. The reason
for this is that the difference is always considered in the line levels. An electromagnetic
interference would increase the potential on both lines to the same extent. Thus the
interference would have no influence on the differential signal. (For comparison: With the
RS232 interface, the interference would only have an influence on the signal lines, but not
on the reference potential).
The RS422 interface is bus-capable.
Functionally, ranges of up to 1000m are possible. It may also be possible to install repeaters
in the bus for power amplification.
Standard 232 – differential
Standard 422 – symmetric
Subject to technical modifications
Handscanner
BCS 3600 series
ex
serial interface)
serial interface)
Revision A / 04/2019