ABB AC 31 - Page 125

Programming
Page 5-16 ABB Control - AC 31
1SBC 260400 R1001-b 06.99
PLC TX
o
RX
o
GND
o
RTS +
o
RTS -
o
o
TX MODEM
o
RX
o
GND
o
Input Modem
o
V + Power
Supply
o
V –
*
Generally V- is connected to GND of
power supply
General cabling between PLC / Modem
RTS with 40 serie:
RTS +
*
RTS – is not connected
Active on low level – 10
+ 10 V (stand-by level)
RTS with 50 serie:
1) Active on high level:
Modem
Power supply (
V+/V-
max = 30V )
I max = 2mA
V+
47 K
Ω
4,7 K
Ω
V-
PLC
5
8
RTS+
(white colour)
RTS-
(blue colour)
Frame sent
Delay
TX signal
0,9 *
V +
RTS signal
V -
2) Active on low level:
Modem
47K
Ω
V-
R1
PLC
Power supply (
V+/V-
max = 30V )
I max = 2mA
V+
RTS-
(blue colour)
RTS+
(white colour)
5
8
V -
+ (
V +
* 4,7/(R1 +4 ,7))
Frame sent
Delay
TX signal
V +
RTS signal