Hardware Manual for the PCD2.M5 Series│Document 26/856; Version EN 12│2014-07-24
Saia-Burgess Controls AG
Communication interfaces
5
5-1
5
PCD2.M5xx0 Communication interfaces
Using the SBC S-Bus
The proprietary SBC S-Bus has been designed essentially for
communication with the engineering and debugging tools, and for
connecting the management level/process control systems.
It is neither suitable nor approved for the connection of field devices from
diverse manufacturers. An open, vendor-neutral fieldbus will be more
effective in achieving this end.
SBC S-Net, the networking concept from Saia-Burgess Controls AG, is based on
the RS-485, Profibus and Ethernet open standards. Ethernet covers layers 1 and 2
of the ISO
/
OSI layer model. Based on layer 2, a variety of different protocols and
applications can be run in parallel on the same network.
Layer 2 (Field Data Link-FDL) from Profibus also allows parallel running of different
application protocols such as DP, FMS and others. The use of this facility allows Profi
S-Net to be used to create a "Private Control Network (PCN)". This makes all SBC
units into active network components.
Profibus Layer 2 (FDL) is integrated into the operating system of the PCD2.M5_
CPUs, giving these units a Profi S-Net connection with transmission speeds up to
1.5 Mbp
/
s.
The devices support Profibus DP and S-Net on the same port. This allows Profibus-
based networks to be constructed cheaply and flexibly.
The PCD2.M5_ type controls have a Saia
PCD
®
COSinus operating system with
which higher transfer speeds (SBC
S-Bus up to 115 kBit
/
s) can be achieved; how
-
ever, lower baud rates (300 and 600 Baud
/
sec.) are no longer supported.
A2
A1
E/A-Slot
C
PCD2.M5540
0
3
2
1
7
4
5
6
x3,Port 2
x4,Port 1
Port 8
