Electrical connection
Leuze electronic GmbH + Co. KG
BCL 300
i
\ BCL 301
i
80
With the aid of a network master (e.g. BCL 500
i
), up to 31 bar code readers can be networked. For this
purpose, the corresponding station address is assigned to every participating BCL 301
i
via the address
switch in the MS 301, MK 301 or MA 100. The devices are networked by connecting the individual RS 485
interfaces in parallel.
In the Leuze multiNet plus network, the individual network devices sequentially transfer their data to the
network master when requested.
The master then transmits the data of all network devices via its host interface (either an RS 232 or
RS 422) to a superior PLC control or to a computer, i.e. it "collects" the scanner data in the network and
transmits it to an interface on the host computer. This reduces interface costs (CPs) and time spent
programming the software.
7.5.1 Wiring the multiNet plus
Leuze multiNet plus connection hints
Shielded, twisted pair conductors should be used for the Leuze multiNet plus. This allows a total network
length of up to 1200 m.
Recommended network cable (e.g. LiYCY 2x0.2mm²):
- Twisted pairs, shielded
- Cross section: min. 0.2mm²
- Copper resistance <100
:
/km
When wiring the network, note the following points:
• The RS 485A and RS 485B cables are looped through in the network and must not in any case be
misconnected; the Leuze multiNet plus network is otherwise not functional.
• Connect the shielding to the slaves on both sides with FE and loop it through.
• The maximum cable length in the network is 1200m.
• The termination is to be switched on at the last participant (MK 301/MA 100) or an external termina
-
tor plug is to be mounted (MS 301).
Figure 7.16: Leuze multiNet plus system topology
NOTE
Use the recommended connectors / sockets or the ready-made cables and terminating resistors
(see chapter 13 "Type overview and accessories").
485 A
485 B
485 A
485 B
485 A
Shield
Shield
Shield
485 B
485
A
48
5 B
FE
RS 485
FE
FE
48
5
B
48
5
B
48
5
A
48
5
A
RS 485
RS 485
RS 485
FE
FE
FE
FE
FE
FE
48
5
B
48
5 B
485
B
48
5
B
48
5 B
485
B
48
5
A
48
5 A
485
A
48
5
A
48
5 A
485
A
multiNet master
(e.g. BCL 500
i
or MA 31…)
BCL 301
i
Slave 1
Termination on the last slave
BCL 301
i
Slave 2
BCL 301
i
Slave 3
BCL 301
i
Slave n
