UM_s-MEXT_ME28relC_00_12_19_ML
5.2. PRELIMINARY OPERATIONS
In order to operate the unit correctly within the local LAN network, it is necessary to perform the following operations.
5.2.1.
Network cabling
For the purposes of setting a local LAN network among the units, it is necessary for the installer to lay an electrical connection among the same by means
of a screened cable (not included in the supply).
INFORMATION
it is recommended to use twisted couple of AWG24 cabling (2 wires in total) + Belden 8723 or 8102 type sheath.
ATTENTION
the electrical connections must be installed when the units are off and not fed. The LAN serial low safety voltage (SELV)
cabling must be kept safely far from the power cables.
ATTENTION
The electrical connections must be installed by qualified staff, when the unit is off and not fed.
ATTENTION
The connections must be made directly on the unit main terminal board: the RX/TX+, RX/TX-, and GND connection terminals
do NOT vary from unit to unit and are clearly indicated on the electrical diagram on board the unit.
All control boards being part of the local network are connected according to a bus arrangement.
The following image shows the type of connection to be made:
5.2.2.
Network configuration
The configuration requires the following assignments.
Unit adddress
1
2
3
4
5
The control board is supplied with LAN address = 1.
The address may be checked directly on the control board or by means of the user terminal.
USER MANUAL
Cable shield
Unit 1 controller
Figure 5-1: Example of local network (LAN) electrical connection
Managed terminals
11 (private)
32 (shared)
12 (private)
32 (shared)
13 (private)
32 (shared)
14 (private)
32 (shared)
15 (private)
32 (shared)
Unit n controller
Unit adddress
6
7
8
9
10
TRANSLATION OF THE ORIGINAL INSTRUCTIONS
47
Last Unit controller
Managed terminals
16 (private)
32 (shared)
17 (private)
32 (shared)
18 (private)
32 (shared)
19 (private)
32 (shared)
20 (private)
32 (shared)