4
Connector Unit MA 30 / MA 31
Leuze electronic
Device Description
Leuze
electronic
Slaves in the multiNet
All Leuze bar code readers and decoders which are capable of multiNet plus
can be used as slaves; these are the devices
•
BCL 40/BCL 80 with MA 10
•
BCL 41 with MA 3-3000
•
BCL 21 with MA 2 / MA 2 L / MA 4…
•
BCL 31 with MA 2 / MA 2 L / MA 4…
•
BCL 90 with MA 90
•
MA 21 for hand-read devices and all RS 232-capable devices
Two-wire RS 485
The Leuze MultiNet plus is optimised for fast transmission of scanner data to
a primary host computer. Physically, it is composed of a two-wire RS 485
interface which is controlled by a software protocol - the multiNet plus proto-
col. This makes wiring the network easy and inexpensive since the network
wiring is passed through from slave to slave.
Shielded, twisted pair conductors should be used for the multiNet. This allows
a total network length of up to 1200m.
Interface modules
The connection of the network to the primary computer is via the host inter-
face of the MA 30/31, which can be equipped with four different physical
interface modules. Modules are available for RS 232, RS 422, TTY and
RS 485.
Protocols
Moreover, various data and frame formats can be selected via the software
setup (see chapter 4.2 "Setting the host interface"). All standard protocols
including
3964/RK512
are, thus, covered.
The big advantage of network operation is the "collection" of data at a single
interface to the host computer. This minimises the wiring of the bar code
readers and eliminates the need for communication processors/interface
units.