Stand Alone Operation; Daisy Chain Network - Leuze electronic BCL 8 Series Original Operating Instructions

Description
3.2

Stand alone operation

The BCL 8 bar code reader is operated as a "stand-alone" device. It is equipped with a
5-wire cable with open ends or a 5-pin M12 connector for the electrical connection of the
supply voltage, the interface and the switching input.
With MA 8.1 connection unit
The MA 8.1 connection unit simplifies the electrical installation of the bar code reader in
stand-alone operation with an RS 232 interface.
For details on the connection units, see Chapter 5.
With MA 8-01 connection unit
The MA 8-01 connection unit simplifies the electrical installation of the bar code reader in
stand-alone operation with an RS 485 interface.
For details on the connection units, see Chapter 5.
3.3

Daisy chain network

A daisy chain is a network based on the RS 232 interface. All devices, which consist of a
transmitter and a receiver, are connected to one another to form a ring. The transmitter of
one device is directly connected to the receiver of the next device until all devices are
connected together to form a ring. One device performs the task of the host system.
Ideally, all BCL 8 devices are to be connected to one another with MA 8.1 connection units
so that:
• the voltage supply of the BCL 8/MA 8.1 is ensured.
• TxD to RxD of the RS 232 is established from one BCL 8 to the next (host).
• the switching outputs and inputs are connected (optional).
A maximum of seven BCL 8 devices may be operated in the daisy chain together with one
host. Further information is available from your Leuze sales office.
12 BCL 8 Leuze electronic