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Vers. 2015-3
14
INSTALLATION, OPERATION
AND MAINTENANCE MANUAL
water cassette
SOFT / SOFT-ECM
RS485 COMMUNICATION NETWORK MAC ADDRESS TABLE SW2
Cable definition
Utilizzare cavo schermato e intrecciato per rete RS485 costituito da una o due
coppie intrecciate e schermate aventi le seguenti caratteristiche:
- Impedenza 120 ohm a 1 MHZ
- Capacità max 50pF/m
Esempi:
- Belden 3106A
- Belden 9841
Wiring scheme
Connect all devices by “daisy chain” topology.
Network limitations
The network should not be longer than 700 meters. The maximum amount of
units per network should not be more than 60 units.
Note: longer distance and higher capacity can be achieved using repeaters
Installation remarks
- When pulling the cable, do not use force that may stretch the cable and
distort its insulation and transmission properties.
- Do not allow the cable to kink, knot, snag, or fray when rolling it out or se
-
curing it.
- Do not splice cable segments. Use continuous runs of cable from one device
to another.
- Do not cinch cables ties too tightly. Do not crush cables when securing them
with staples or supports. Staple by hand or use staples with depth stops.
- Maintain the color-coding of all cabling throughout your system.
- Maintain wire twisting and run the cable jacket as closely as possible to the
termination point.
- Install cables and controllers to minimize the possibility of accidental contact
with other, potentially hazardous and disruptive power and SOFTing cables.
Do not run communication cables in the same conduit of electrical cables and
if you cross an electrical cable, cross at a 90° angle.
- Do not place communication cables near other bare power cables, SOFTning
rods, antennas, transformers, steam or hot water pipes, in any conduit, box,
channel, duct or other enclosure containing power or SOFTing circuits of any
type. Keep communication cables and controllers at least 2 meters from large
inductive loads (power distribution panels, SOFTing ballasts, motors, etc.).
Addressing
Use the attached MAC Address table to define the network addresses of the
devices.
Termination
First and last devices in the communication line should be terminated with
a 120 resistor to prevent signal reflection. When applicable, use the “End of
Line” jumpers for this purpose.
Grounding
Connect one end of the shield (at the end of the communication line) to a
tested ground (earth). Leave the other end of the shield not connected (on
the air).
MAC...Switches ON
0….Not in use
1….1
2….2
3….1,2
4….3
5….1,3
6….2,3
7….1,2,3
8….4
9….1,4
10….2,4
11….1,2,4
12….3,4
13….1,3,4
14….2,3,4
15….1,2,3,4
16….5
17….1,5
18….2,5
19….1,2,5
20….3,5
21….1,3,5
22….2,3,5
23….1,2,3,5
24….4,5
25….1,4,5
26….2,4,5
27….1,2,4,5
28….3,4,5
29….1,3,4,5
30….2,3,4,5
31….1,2,3,4,5
32….6
33….1,6
34….2,6
35….1,2,6
36….3,6
37….1,3,6
38….2,3,6
39….1,2,3,6
40….4,6
41….1,4,6
42….2,4,6
43….1,2,4,6
44….3,4,6
45….1,3,4,6
46….2,3,4,6
47….1,2,3,4,6
48….5,6
49….1,5,6
50….2,5,6
51….1,2,5,6
52….3,5,6
53….1,3,5,6
54….2,3,5,6
55….1,2,3,5,6
56….4,5,6
57….1,4,5,6
58….2,4,5,6
59….1,2,4,5,6
60….3,4,5,6