Chapter 6 Deployment PtP communication Manual VIPA System 300S SPEED7
6-8 HB140E - CPU SC - RE_313-6CF03 - Rev. 07/45
Deployment RS485 interface
The RS485 interface X3 of the CPU 313SC/DPM may be set to PtP
communication (point-to-point) by means of a hardware configuration.
Parameterization and communication happens by means of SFCs. The
following characteristics distinguish the RS485 interface:
• Logical states represented by voltage differences between the two cores
of a twisted pair cable
• Serial bus connection in two-wire technology using half duplex mode
• Data communications up to a max. distance of 500m
• Data communication rate up to 115.2kBaud
9pin SubD jack
Pin RS485
1 n.c.
2 M24V
3 RxD/TxD-P (Line B)
4 RTS
5 M5V
6 P5V
7 P24V
8 RxD/TxD-N (Line A)
5
4
3
2
1
9
8
7
6
9 n.c.
RxD/TxD-P (B)
RxD/TxD-N (A)
shield
CPU - RS485
Periphery
3
8
Periphery
Periphery
RxD/TxD-P (B)
RxD/TxD-N (A)
RxD/TxD-P (B)
RxD/TxD-N (A)
RxD/TxD-P (B)
RxD/TxD-N (A)
Properties RS485
Connection RS485
Connection