GPC150 ETC [List of Unclassifed Manufacturers], GPC150 Datasheet - Page 29
GPC150
Manufacturer Part Number
GPC150
Description
General Purpose Controller Z84C15
Manufacturer
ETC [List of Unclassifed Manufacturers]
Datasheet
1.GPC150.pdf
(103 pages)
- Current page: 29 of 103
- Download datasheet (2Mb)
Da notare che in una rete RS 485, devono essere presenti due resistenze di forzatura lungo la linea
e due resitenze di terminazione (120 ), alle estremità della stessa, rispettivamente vicino all'unità
Master ed all'ultima unità Slave.
A bordo della GPC
o disinserita, tramite appositi jumpers, come illutrato in seguito.
In merito alla resistenza di terminazione dell'unità Master, provvedere a collegarla solo se questa non
é già presente al suo interno (ad esempio molti convertitori RS232-RS485 ne sono già provvisti).
Per maggiori informazioni consultare il Data-Book TEXAS INSTRUMENTS, "RS 422 and RS 485
Interface Cicuits", nella parte introduttiva riguardante le reti RS 422-485.
Pagina 22
Master
TXRX
GND
®
F
+
150 è presente la circuiteria di terminazione e forzatura, che può essere inserita
-
IGURA
17: E
120
SEMPIO DI COLLEGAMENTO IN RETE IN
grifo
®
4
4
5
3
4
5
5
3
3
RS 485
+
+
GPC
-
GND
-
GND
+
-
GND
+5V
TXRXB
TXRXB
®
ITALIAN TECHNOLOGY
150
Slave n
TXRXB
Slave 1
Slave 2
CN2
CN2
CN2
Rel. 3.00
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