ETIC AFO485, Руководство пользователя, Страница: 31 / 36

AFO485 and RFO485 USER MANUAL ref 9011509-01 Page 31
5.4. Fuse
The circuit board is equipped with an automatically rearming fuse.
5.5. Connection of RS485 or RS422 interfaces
This section concerns only the models equipped with a RS485 and RS422
interface : AFO485-10, –20, –30 or –40 and RFO485-11, –22, –33 or –44
.
The A and B signals of the RS485 / RS422 interfaces are polarised by the
2.2 Kohm resistors on the circuit board.
When the data rate is high or the length of the RS485 / RS422 bus justifies it, a 120
Ohm matching resistor should be attached to both ends of the network.
(B) Conn.4 / pin 5
2.2 KOhm
+5v
RS485
TERMINAL
PC, PLC...)
2.2 KOhm
(A) Conn.4 / pin 6
Distance < 5 m
AFO485 - RFO485
2.2 KOhm
+5v
RS422
2.2 KOhm
(A) Conn.4 / pin 6
Distance < 5 m
2.2 KOhm
+5v
2.2 KOhm
TERMINAL
(PC, PLC...)
(B) Conn.4 / pin 5
(B') Conn.4 / pin 3
(A') Conn.4 / pin 4
RS422
AFO485
RFO485