CLIVET WSAN-XEE Series Installation And Use Manual page 20

SERIALE
TTL / RS485
1 2 3 4 5 6 7 8 9 10 11 12
Below the indications for the serial connection ; refer anyway to the CLIVET "RS 485 NETWORKS – GUIDELINES"
document and ask for the COMMUNICATION PROTOCOL about the COMPACT-MEDIUM electronics
- The total length of each single serial line, don't
have to be over 1000 metres
- The potential difference between the "ground" of
two RS485 switches must be less of 7 V
TYPE OF NETWORK
The serial lines must be connected in bus typology, i.e. nodes to more points are not admitted
SHIELD
- It must be connected to a ground without
disturbances
- Connected to round in only one point
- Provide to the shield continuity during all the serial
cable extension.
M6G240F7-02
SERIAL CONVERTER TTL/RS485
OPTIONAL - code PE2N0002
Plugged-in in the main module on the electric board (see lay in the wiring diagram). It is
possible to connect up to 127 units with a single supervision system.
The connection with a PC must use a RS485/232 converter; the serial line RS232 can
be max. 10-m long.
CONNECTIONS:
make reference to the electrical panel and to the SIGNALS AND DATA LINES
paragraph
OK
-
+
TTL /
gnd
N 1
RS485
C
1
2
0
2
9
1
8
1
-
+
TTL /
gnd
1
RS485
N
C
1
2
0
2
9
1
8
1
- Couple of conductors twisted and shielded
- Section of conductor 0.22mm
- Nominal capacity between conductors < 50
pF/m nominal impedance 120 Ω
Recommended cable BELDEN 3105 A
-
Supervisor
12 V AC RS-232
- +
gnd
RS-485
12 V AC
TO THE OTHER
UNITS
14/03/08
2 2
...0,35mm
NO !
Sistema di supervisione
pag 20