SIEMENS
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Siemens IK PI · 2015
PROFIBUS
PROFIBUS Components
PROFIBUS DP ASICs
3
■
Overview
•
Easy connection of field devices to PROFIBUS
•
Integrated low power management
•
Different ASICs for the different functional requirements and
application areas
■
Application
The PROFIBUS DP ASICs allow equipment manufacturers to
connect their devices to PROFIBUS easily.
They can be implemented at transmission rates of up to
12 Mbit/s.
The following blocks are available for different functional require-
ments and fields of application:
•
Master applications:
ASPC 2
•
Intelligent slaves:
SPC 3 and SPC3LV for PROFIBUS DP, with hardware-
controlled bus access;
DPC 31 with integral 8031 core;
SPC 4-2.
•
Connection in intrinsically safe systems:
SIM 1-2 for physical connection in intrinsically safe fieldbus
systems as a Medium Attachment Unit for IEC 61158-2 at
31.25 Kbit/s. Especially for combining with the SPC 4-2 and
DPC 31.
•
Simple slaves:
LSPM 2 with 32 input/output bits for confined spaces
•
Connection to fiber-optic conductors:
FOCSI
module for electrical conditioning of signals already received
or to be sent. The module ensures that the optically trans-
mitted signals are properly electrically restored (retiming/
retriggering)
For initial development, order quantities of 5/6 ASICs are
possible (not suitable for batch assembly because the pins of
the ASIC can be bent due to the packaging; packing units larger
than 5/6 units must be used)
The number of ASICs per packing unit depends on the ASIC
type (see ordering data).
The ASICS ASPC 2, SPC3, SPC3LV, DPC31, LSPM2 and FOCSI
can also be supplied in a lead-free design.
■
Design
ASPC 2
The ASPC 2 is a preprocessing communications chip for master
applications with a maximum transmission rate of 12 Mbit/s. The
ASIC has not been disclosed. The brief user manual describes
the pins and the electrical properties of the ASPC 2. A separate
microprocessor and the appropriate firmware are required for
operation. The firmware is tuned to the 80C165 processor and
can be obtained by purchasing a license.
SPC 3
The SPC 3 is a preprocessing communications chip with a
processor interface. The SPC 3 processes message frame iden-
tification, address identification, execution of the data back-up
sequences and protocol processing for PROFIBUS DP.
Firmware is offered for the Siemens SPC 3 (see ordering data).
SPC 3LV
The product portfolio for intelligent PROFIBUS slave applica-
tions was expanded by a 3.3 V version. The SPC3LV is 100%
compatible in terms of functions and pins to the 5 V version
(SPC3).
DPC 31
The DPC 31 is a preprocessing communications module with
a processor interface and an integrated processor core
(C31 core).
It supports the connection of intelligent field devices as slaves
on PROFIBUS DP and PROFIBUS PA.
The DPC 31 autonomously processes all communications tasks
and has, in addition, an integral C31 core for further applica-
tions. It combines the communication properties of the ASICs
SPC 3 and SPC 4-2 in one chip. The integrated C31 core can
also be programmed as required. Firmware is offered for the
Siemens ASIC DPC 31 (see ordering data).
SPC 4-2
The SPC 4-2 is a preprocessing communications chip with a
processor interface. It is designed for combined applications
and due to the Low Power Management function, it is ideally
suited to use in intrinsically safe applications. Firmware is offered
for the SPC 4-2 by the company TMG itec
1)
. The signals are
converted for PROFIBUS PA using the SIM 1-2 module.
1)
Order from:
TMG itec
76137 Karlsruhe
Tel. +49 (0)721 82 80 60
© Siemens AG 2014