User Manual

VEGACOM 557 Siemens 11
Pin Description I/ O
1 CTS clear to send I
2 RxD receive data I
3 TxD transmit data O
4 RTS request to send O
5 G ND ground –
Note:
• VEGACOM 557 operates without hardware
handshake, i.e. RTS and CTS are not
wired.
P1 P2
P4
P3
2
2 / 5
3 … 5
4
Mounting and electrical connection
2. 2 Potential stages and galvanic separation
2.3 Electrical connection
Multiple plug (rear)
DISBUS not used with
VEGALOG)
2
N (-)
d b z
2
L1 (+)
16
18
18
20
20
22
24
28
30
30
32
32
+
–
Supply voltage
D-SUB plug (front plate)
Power supply unit
DISBUS /
LOGBUS
RS
232C
Microcontroller
Field bus controller
Siemens S5
P1 … P4: Potential stages
R+ RxD
T+ TxD
TTY RS 232 RS 485 RS 422
GND GND GND GND
DATA RX
TX
TTY RS 232 RS 485 RS 422
GND GND GND GND
1
2
3
6
7
8
9
5
4
R–
T–
/DATA /RX
/TX
RS 232
CTS
RxD
TxD
RTS
GND